v3.26.1
Shareholder Report
6 Months Ended
Jun. 30, 2026
USD ($)
Holding
Shareholder Report [Line Items]  
Document Type N-CSRS
Amendment Flag false
Registrant Name JOHN HANCOCK VARIABLE INSURANCE TRUST
Entity Central Index Key 0000756913
Entity Investment Company Type N-1A
Document Period End Date Jun. 30, 2026
C000022342 [Member]  
Shareholder Report [Line Items]  
Fund Name Total Bond Market Trust
Class Name Series NAV
Trading Symbol JAGUX
Annual or Semi-Annual Statement [Text Block] This semiannual shareholder report contains important information about the Total Bond Market Trust (the fund) for the period of January 1, 2026 to June 30, 2026.
Shareholder Report Annual or Semi-Annual semi-annual shareholder report
Additional Information [Text Block] You can find additional information about the fund at dfinview.com/johnhancock?site=funds. You can also request this information by contacting us at 800-344-1029 for John Hancock Variable Annuities and 800-732-5543 for John Hancock Variable Life Insurance.
Additional Information Phone Number 800-344-1029800-732-5543
Additional Information Website dfinview.com/johnhancock?site=funds
Expenses [Text Block]
What were the fund costs during the last six months ?
(Based on a hypothetical $10,000 investment)
Fund (Class) Costs of a $10,000 investment Costs paid as a percentage
of a $10,000 investment
Total Bond Market Trust
(Series NAV/JAGUX)
$12 0.25%
Expenses Paid, Amount $ 12
Expense Ratio, Percent 0.25%
Net Assets $ 1,062,180,596
Holdings Count | Holding 1,131
Investment Company Portfolio Turnover 16.00%
Additional Fund Statistics [Text Block]
Fund Statistics
Fund net assets $1,062,180,596
Total number of portfolio holdings 1,131
Portfolio turnover rate 16%
Holdings [Text Block]
Graphical Representation of Holdings
The tables below show the investment makeup of the fund, representing a percentage of the total net assets of the fund.
Portfolio Composition
U.S. Government 47.4%
Corporate bonds 24.3%
U.S. Government Agency 24.0%
Collateralized mortgage obligations – Commercial and residential 1.1%
Foreign government obligations 0.7%
Asset-backed securities 0.4%
Municipal bonds 0.3%
Short-term investments and other 1.8%
Quality Composition
Graphical Representation - Allocation 1 Chart
Ratings are from Moody’s Investors Service, Inc. If not available, we have used S&P Global Ratings. In the absence of ratings from these agencies, we have used Fitch Ratings, Inc. “Not rated” securities are those with no ratings available from these agencies. All ratings are as of 6-30-26 and do not reflect subsequent downgrades or upgrades, if any.
Holdings may not have been held by the fund for the entire period and are subject to change without notice. Portfolio composition is subject to review in accordance with the fund’s investment strategy and may vary in the future. Current and future portfolio holdings are subject to risk and may change at any time.
Credit Quality Explanation [Text Block]
Ratings are from Moody’s Investors Service, Inc. If not available, we have used S&P Global Ratings. In the absence of ratings from these agencies, we have used Fitch Ratings, Inc. “Not rated” securities are those with no ratings available from these agencies. All ratings are as of 6-30-26 and do not reflect subsequent downgrades or upgrades, if any.
Credit Ratings Selection [Text Block] Ratings are from Moody’s Investors Service, Inc. If not available, we have used S&P Global Ratings. In the absence of ratings from these agencies, we have used Fitch Ratings, Inc.
C000117966 [Member]  
Shareholder Report [Line Items]  
Fund Name Total Bond Market Trust
Class Name Series II
Trading Symbol JAGVX
Annual or Semi-Annual Statement [Text Block] This semiannual shareholder report contains important information about the Total Bond Market Trust (the fund) for the period of January 1, 2026 to June 30, 2026.
Shareholder Report Annual or Semi-Annual semi-annual shareholder report
Additional Information [Text Block] You can find additional information about the fund at dfinview.com/johnhancock?site=funds. You can also request this information by contacting us at 800-344-1029 for John Hancock Variable Annuities and 800-732-5543 for John Hancock Variable Life Insurance.
Additional Information Phone Number 800-344-1029800-732-5543
Additional Information Website dfinview.com/johnhancock?site=funds
Expenses [Text Block]
What were the fund costs during the last six months ?
(Based on a hypothetical $10,000 investment)
Fund (Class) Costs of a $10,000 investment Costs paid as a percentage
of a $10,000 investment
Total Bond Market Trust
(Series II/JAGVX)
$25 0.50%
Expenses Paid, Amount $ 25
Expense Ratio, Percent 0.50%
Net Assets $ 1,062,180,596
Holdings Count | Holding 1,131
Investment Company Portfolio Turnover 16.00%
Additional Fund Statistics [Text Block]
Fund Statistics
Fund net assets $1,062,180,596
Total number of portfolio holdings 1,131
Portfolio turnover rate 16%
Holdings [Text Block]
Graphical Representation of Holdings
The tables below show the investment makeup of the fund, representing a percentage of the total net assets of the fund.
Portfolio Composition
U.S. Government 47.4%
Corporate bonds 24.3%
U.S. Government Agency 24.0%
Collateralized mortgage obligations – Commercial and residential 1.1%
Foreign government obligations 0.7%
Asset-backed securities 0.4%
Municipal bonds 0.3%
Short-term investments and other 1.8%
Quality Composition
Graphical Representation - Allocation 1 Chart
Ratings are from Moody’s Investors Service, Inc. If not available, we have used S&P Global Ratings. In the absence of ratings from these agencies, we have used Fitch Ratings, Inc. “Not rated” securities are those with no ratings available from these agencies. All ratings are as of 6-30-26 and do not reflect subsequent downgrades or upgrades, if any.
Holdings may not have been held by the fund for the entire period and are subject to change without notice. Portfolio composition is subject to review in accordance with the fund’s investment strategy and may vary in the future. Current and future portfolio holdings are subject to risk and may change at any time.
Credit Quality Explanation [Text Block]
Ratings are from Moody’s Investors Service, Inc. If not available, we have used S&P Global Ratings. In the absence of ratings from these agencies, we have used Fitch Ratings, Inc. “Not rated” securities are those with no ratings available from these agencies. All ratings are as of 6-30-26 and do not reflect subsequent downgrades or upgrades, if any.
Credit Ratings Selection [Text Block] Ratings are from Moody’s Investors Service, Inc. If not available, we have used S&P Global Ratings. In the absence of ratings from these agencies, we have used Fitch Ratings, Inc.
C000117965 [Member]  
Shareholder Report [Line Items]  
Fund Name Total Bond Market Trust
Class Name Series I
Trading Symbol JTBMX
Annual or Semi-Annual Statement [Text Block] This semiannual shareholder report contains important information about the Total Bond Market Trust (the fund) for the period of January 1, 2026 to June 30, 2026.
Shareholder Report Annual or Semi-Annual semi-annual shareholder report
Additional Information [Text Block] You can find additional information about the fund at dfinview.com/johnhancock?site=funds. You can also request this information by contacting us at 800-344-1029 for John Hancock Variable Annuities and 800-732-5543 for John Hancock Variable Life Insurance.
Additional Information Phone Number 800-344-1029800-732-5543
Additional Information Website dfinview.com/johnhancock?site=funds
Expenses [Text Block]
What were the fund costs during the last six months ?
(Based on a hypothetical $10,000 investment)
Fund (Class) Costs of a $10,000 investment Costs paid as a percentage
of a $10,000 investment
Total Bond Market Trust
(Series I/JTBMX)
$15 0.30%
Expenses Paid, Amount $ 15
Expense Ratio, Percent 0.30%
Net Assets $ 1,062,180,596
Holdings Count | Holding 1,131
Investment Company Portfolio Turnover 16.00%
Additional Fund Statistics [Text Block]
Fund Statistics
Fund net assets $1,062,180,596
Total number of portfolio holdings 1,131
Portfolio turnover rate 16%
Holdings [Text Block]
Graphical Representation of Holdings
The tables below show the investment makeup of the fund, representing a percentage of the total net assets of the fund.
Portfolio Composition
U.S. Government 47.4%
Corporate bonds 24.3%
U.S. Government Agency 24.0%
Collateralized mortgage obligations – Commercial and residential 1.1%
Foreign government obligations 0.7%
Asset-backed securities 0.4%
Municipal bonds 0.3%
Short-term investments and other 1.8%
Quality Composition
Graphical Representation - Allocation 1 Chart
Ratings are from Moody’s Investors Service, Inc. If not available, we have used S&P Global Ratings. In the absence of ratings from these agencies, we have used Fitch Ratings, Inc. “Not rated” securities are those with no ratings available from these agencies. All ratings are as of 6-30-26 and do not reflect subsequent downgrades or upgrades, if any.
Holdings may not have been held by the fund for the entire period and are subject to change without notice. Portfolio composition is subject to review in accordance with the fund’s investment strategy and may vary in the future. Current and future portfolio holdings are subject to risk and may change at any time.
Credit Quality Explanation [Text Block]
Ratings are from Moody’s Investors Service, Inc. If not available, we have used S&P Global Ratings. In the absence of ratings from these agencies, we have used Fitch Ratings, Inc. “Not rated” securities are those with no ratings available from these agencies. All ratings are as of 6-30-26 and do not reflect subsequent downgrades or upgrades, if any.
Credit Ratings Selection [Text Block] Ratings are from Moody’s Investors Service, Inc. If not available, we have used S&P Global Ratings. In the absence of ratings from these agencies, we have used Fitch Ratings, Inc.
C000022375 [Member]  
Shareholder Report [Line Items]  
Fund Name Core Bond Trust
Class Name Series I
Trading Symbol JADKX
Annual or Semi-Annual Statement [Text Block] This semiannual shareholder report contains important information about the Core Bond Trust (the fund) for the period of January 1, 2026 to June 30, 2026.
Shareholder Report Annual or Semi-Annual semi-annual shareholder report
Additional Information [Text Block] You can find additional information about the fund at dfinview.com/johnhancock?site=funds. You can also request this information by contacting us at 800-344-1029 for John Hancock Variable Annuities and 800-732-5543 for John Hancock Variable Life Insurance.
Additional Information Phone Number 800-344-1029800-732-5543
Additional Information Website dfinview.com/johnhancock?site=funds
Expenses [Text Block]
What were the fund costs during the last six months ?
(Based on a hypothetical $10,000 investment)
Fund (Class) Costs of a $10,000 investment Costs paid as a percentage
of a $10,000 investment
Core Bond Trust
(Series I/JADKX)
$33 0.67%
Expenses Paid, Amount $ 33
Expense Ratio, Percent 0.67%
Net Assets $ 660,562,487
Holdings Count | Holding 928
Investment Company Portfolio Turnover 171.00%
Additional Fund Statistics [Text Block]
Fund Statistics
Fund net assets $660,562,487
Total number of portfolio holdings 928
Portfolio turnover rate 171%
Holdings [Text Block]
Graphical Representation of Holdings
The tables below show the investment makeup of the fund, representing a percentage of the total investments of the fund.
Portfolio Composition
U.S. Government Agency 28.0%
U.S. Government 27.3%
Corporate bonds 26.8%
Collateralized mortgage obligations – U.S. Government Agency 7.7%
Asset-backed securities 5.6%
Collateralized mortgage obligations – Commercial and residential 1.8%
Foreign government obligations 0.8%
Municipal bonds 0.1%
Short-term investments 1.9%
Quality Composition
Graphical Representation - Allocation 1 Chart
Ratings are from Moody’s Investors Service, Inc. If not available, we have used S&P Global Ratings. In the absence of ratings from these agencies, we have used Fitch Ratings, Inc. “Not rated” securities are those with no ratings available from these agencies. All ratings are as of 6-30-26 and do not reflect subsequent downgrades or upgrades, if any.
Holdings may not have been held by the fund for the entire period and are subject to change without notice. Portfolio composition is subject to review in accordance with the fund’s investment strategy and may vary in the future. Current and future portfolio holdings are subject to risk and may change at any time.
Credit Quality Explanation [Text Block]
Ratings are from Moody’s Investors Service, Inc. If not available, we have used S&P Global Ratings. In the absence of ratings from these agencies, we have used Fitch Ratings, Inc. “Not rated” securities are those with no ratings available from these agencies. All ratings are as of 6-30-26 and do not reflect subsequent downgrades or upgrades, if any.
Credit Ratings Selection [Text Block] Ratings are from Moody’s Investors Service, Inc. If not available, we have used S&P Global Ratings. In the absence of ratings from these agencies, we have used Fitch Ratings, Inc.
C000022376 [Member]  
Shareholder Report [Line Items]  
Fund Name Core Bond Trust
Class Name Series II
Trading Symbol JAAEX
Annual or Semi-Annual Statement [Text Block] This semiannual shareholder report contains important information about the Core Bond Trust (the fund) for the period of January 1, 2026 to June 30, 2026.
Shareholder Report Annual or Semi-Annual semi-annual shareholder report
Additional Information [Text Block] You can find additional information about the fund at dfinview.com/johnhancock?site=funds. You can also request this information by contacting us at 800-344-1029 for John Hancock Variable Annuities and 800-732-5543 for John Hancock Variable Life Insurance.
Additional Information Phone Number 800-344-1029800-732-5543
Additional Information Website dfinview.com/johnhancock?site=funds
Expenses [Text Block]
What were the fund costs during the last six months ?
(Based on a hypothetical $10,000 investment)
Fund (Class) Costs of a $10,000 investment Costs paid as a percentage
of a $10,000 investment
Core Bond Trust
(Series II/JAAEX)
$43 0.87%
Expenses Paid, Amount $ 43
Expense Ratio, Percent 0.87%
Net Assets $ 660,562,487
Holdings Count | Holding 928
Investment Company Portfolio Turnover 171.00%
Additional Fund Statistics [Text Block]
Fund Statistics
Fund net assets $660,562,487
Total number of portfolio holdings 928
Portfolio turnover rate 171%
Holdings [Text Block]
Graphical Representation of Holdings
The tables below show the investment makeup of the fund, representing a percentage of the total investments of the fund.
Portfolio Composition
U.S. Government Agency 28.0%
U.S. Government 27.3%
Corporate bonds 26.8%
Collateralized mortgage obligations – U.S. Government Agency 7.7%
Asset-backed securities 5.6%
Collateralized mortgage obligations – Commercial and residential 1.8%
Foreign government obligations 0.8%
Municipal bonds 0.1%
Short-term investments 1.9%
Quality Composition
Graphical Representation - Allocation 1 Chart
Ratings are from Moody’s Investors Service, Inc. If not available, we have used S&P Global Ratings. In the absence of ratings from these agencies, we have used Fitch Ratings, Inc. “Not rated” securities are those with no ratings available from these agencies. All ratings are as of 6-30-26 and do not reflect subsequent downgrades or upgrades, if any.
Holdings may not have been held by the fund for the entire period and are subject to change without notice. Portfolio composition is subject to review in accordance with the fund’s investment strategy and may vary in the future. Current and future portfolio holdings are subject to risk and may change at any time.
Credit Quality Explanation [Text Block]
Ratings are from Moody’s Investors Service, Inc. If not available, we have used S&P Global Ratings. In the absence of ratings from these agencies, we have used Fitch Ratings, Inc. “Not rated” securities are those with no ratings available from these agencies. All ratings are as of 6-30-26 and do not reflect subsequent downgrades or upgrades, if any.
Credit Ratings Selection [Text Block] Ratings are from Moody’s Investors Service, Inc. If not available, we have used S&P Global Ratings. In the absence of ratings from these agencies, we have used Fitch Ratings, Inc.
C000022374 [Member]  
Shareholder Report [Line Items]  
Fund Name Core Bond Trust
Class Name Series NAV
Trading Symbol JVCNX
Annual or Semi-Annual Statement [Text Block] This semiannual shareholder report contains important information about the Core Bond Trust (the fund) for the period of January 1, 2026 to June 30, 2026.
Shareholder Report Annual or Semi-Annual semi-annual shareholder report
Additional Information [Text Block] You can find additional information about the fund at dfinview.com/johnhancock?site=funds. You can also request this information by contacting us at 800-344-1029 for John Hancock Variable Annuities and 800-732-5543 for John Hancock Variable Life Insurance.
Additional Information Phone Number 800-344-1029800-732-5543
Additional Information Website dfinview.com/johnhancock?site=funds
Expenses [Text Block]
What were the fund costs during the last six months ?
(Based on a hypothetical $10,000 investment)
Fund (Class) Costs of a $10,000 investment Costs paid as a percentage
of a $10,000 investment
Core Bond Trust
(Series NAV/JVCNX)
$31 0.62%
Expenses Paid, Amount $ 31
Expense Ratio, Percent 0.62%
Net Assets $ 660,562,487
Holdings Count | Holding 928
Investment Company Portfolio Turnover 171.00%
Additional Fund Statistics [Text Block]
Fund Statistics
Fund net assets $660,562,487
Total number of portfolio holdings 928
Portfolio turnover rate 171%
Holdings [Text Block]
Graphical Representation of Holdings
The tables below show the investment makeup of the fund, representing a percentage of the total investments of the fund.
Portfolio Composition
U.S. Government Agency 28.0%
U.S. Government 27.3%
Corporate bonds 26.8%
Collateralized mortgage obligations – U.S. Government Agency 7.7%
Asset-backed securities 5.6%
Collateralized mortgage obligations – Commercial and residential 1.8%
Foreign government obligations 0.8%
Municipal bonds 0.1%
Short-term investments 1.9%
Quality Composition
Graphical Representation - Allocation 1 Chart
Ratings are from Moody’s Investors Service, Inc. If not available, we have used S&P Global Ratings. In the absence of ratings from these agencies, we have used Fitch Ratings, Inc. “Not rated” securities are those with no ratings available from these agencies. All ratings are as of 6-30-26 and do not reflect subsequent downgrades or upgrades, if any.
Holdings may not have been held by the fund for the entire period and are subject to change without notice. Portfolio composition is subject to review in accordance with the fund’s investment strategy and may vary in the future. Current and future portfolio holdings are subject to risk and may change at any time.
Credit Quality Explanation [Text Block]
Ratings are from Moody’s Investors Service, Inc. If not available, we have used S&P Global Ratings. In the absence of ratings from these agencies, we have used Fitch Ratings, Inc. “Not rated” securities are those with no ratings available from these agencies. All ratings are as of 6-30-26 and do not reflect subsequent downgrades or upgrades, if any.
Credit Ratings Selection [Text Block] Ratings are from Moody’s Investors Service, Inc. If not available, we have used S&P Global Ratings. In the absence of ratings from these agencies, we have used Fitch Ratings, Inc.
C000022418 [Member]  
Shareholder Report [Line Items]  
Fund Name Opportunistic Fixed Income Trust
Class Name Series NAV
Trading Symbol JAEKX
Annual or Semi-Annual Statement [Text Block] This semiannual shareholder report contains important information about the Opportunistic Fixed Income Trust (the fund) for the period of January 1, 2026 to June 30, 2026.
Shareholder Report Annual or Semi-Annual semi-annual shareholder report
Additional Information [Text Block] You can find additional information about the fund at dfinview.com/johnhancock?site=funds. You can also request this information by contacting us at 800-344-1029 for John Hancock Variable Annuities and 800-732-5543 for John Hancock Variable Life Insurance.
Additional Information Phone Number 800-344-1029800-732-5543
Additional Information Website dfinview.com/johnhancock?site=funds
Expenses [Text Block]
What were the fund costs during the last six months ?
(Based on a hypothetical $10,000 investment)
Fund (Class) Costs of a $10,000 investment Costs paid as a percentage
of a $10,000 investment
Opportunistic Fixed Income Trust
(Series NAV/JAEKX)
$39 0.77%
Expenses Paid, Amount $ 39
Expense Ratio, Percent 0.77%
Net Assets $ 143,922,886
Holdings Count | Holding 1,248
Investment Company Portfolio Turnover 131.00%
Additional Fund Statistics [Text Block]
Fund Statistics
Fund net assets $143,922,886
Total number of portfolio holdings 1,248
Portfolio turnover rate 131%
Holdings [Text Block]
Graphical Representation of Holdings
The tables below show the investment makeup of the fund, representing a percentage of the total investments of the fund.
Portfolio Composition
Foreign government obligations 35.3%
U.S. Government Agency 20.2%
Corporate bonds 12.3%
U.S. Government 9.3%
Convertible bonds 7.7%
Asset-backed securities 2.8%
Term loans 2.8%
Collateralized mortgage obligations – Commercial and residential 2.7%
Collateralized mortgage obligations – U.S. Government Agency 2.0%
Preferred securities 1.8%
Exchange-traded funds 0.1%
Short-term investments 3.0%
Country Composition
United States 58.6%
Brazil 6.6%
Colombia 4.0%
South Korea 4.0%
Japan 2.8%
Czech Republic 2.6%
Mexico 2.5%
Indonesia 2.0%
United Kingdom 1.5%
New Zealand 1.5%
Other countries 13.9%
Quality Composition
Graphical Representation - Allocation 2 Chart
Ratings are from Moody’s Investors Service, Inc. If not available, we have used S&P Global Ratings. In the absence of ratings from these agencies, we have used Fitch Ratings, Inc. “Not rated” securities are those with no ratings available from these agencies. All ratings are as of 6-30-26 and do not reflect subsequent downgrades or upgrades, if any.
Holdings may not have been held by the fund for the entire period and are subject to change without notice. Portfolio composition is subject to review in accordance with the fund’s investment strategy and may vary in the future. Current and future portfolio holdings are subject to risk and may change at any time.
Credit Quality Explanation [Text Block]
Ratings are from Moody’s Investors Service, Inc. If not available, we have used S&P Global Ratings. In the absence of ratings from these agencies, we have used Fitch Ratings, Inc. “Not rated” securities are those with no ratings available from these agencies. All ratings are as of 6-30-26 and do not reflect subsequent downgrades or upgrades, if any.
Credit Ratings Selection [Text Block] Ratings are from Moody’s Investors Service, Inc. If not available, we have used S&P Global Ratings. In the absence of ratings from these agencies, we have used Fitch Ratings, Inc.
C000022420 [Member]  
Shareholder Report [Line Items]  
Fund Name Opportunistic Fixed Income Trust
Class Name Series II
Trading Symbol JAEHX
Annual or Semi-Annual Statement [Text Block] This semiannual shareholder report contains important information about the Opportunistic Fixed Income Trust (the fund) for the period of January 1, 2026 to June 30, 2026.
Shareholder Report Annual or Semi-Annual semi-annual shareholder report
Additional Information [Text Block] You can find additional information about the fund at dfinview.com/johnhancock?site=funds. You can also request this information by contacting us at 800-344-1029 for John Hancock Variable Annuities and 800-732-5543 for John Hancock Variable Life Insurance.
Additional Information Phone Number 800-344-1029800-732-5543
Additional Information Website dfinview.com/johnhancock?site=funds
Expenses [Text Block]
What were the fund costs during the last six months ?
(Based on a hypothetical $10,000 investment)
Fund (Class) Costs of a $10,000 investment Costs paid as a percentage
of a $10,000 investment
Opportunistic Fixed Income Trust
(Series II/JAEHX)
$51 1.02%
Expenses Paid, Amount $ 51
Expense Ratio, Percent 1.02%
Net Assets $ 143,922,886
Holdings Count | Holding 1,248
Investment Company Portfolio Turnover 131.00%
Additional Fund Statistics [Text Block]
Fund Statistics
Fund net assets $143,922,886
Total number of portfolio holdings 1,248
Portfolio turnover rate 131%
Holdings [Text Block]
Graphical Representation of Holdings
The tables below show the investment makeup of the fund, representing a percentage of the total investments of the fund.
Portfolio Composition
Foreign government obligations 35.3%
U.S. Government Agency 20.2%
Corporate bonds 12.3%
U.S. Government 9.3%
Convertible bonds 7.7%
Asset-backed securities 2.8%
Term loans 2.8%
Collateralized mortgage obligations – Commercial and residential 2.7%
Collateralized mortgage obligations – U.S. Government Agency 2.0%
Preferred securities 1.8%
Exchange-traded funds 0.1%
Short-term investments 3.0%
Country Composition
United States 58.6%
Brazil 6.6%
Colombia 4.0%
South Korea 4.0%
Japan 2.8%
Czech Republic 2.6%
Mexico 2.5%
Indonesia 2.0%
United Kingdom 1.5%
New Zealand 1.5%
Other countries 13.9%
Quality Composition
Graphical Representation - Allocation 2 Chart
Ratings are from Moody’s Investors Service, Inc. If not available, we have used S&P Global Ratings. In the absence of ratings from these agencies, we have used Fitch Ratings, Inc. “Not rated” securities are those with no ratings available from these agencies. All ratings are as of 6-30-26 and do not reflect subsequent downgrades or upgrades, if any.
Holdings may not have been held by the fund for the entire period and are subject to change without notice. Portfolio composition is subject to review in accordance with the fund’s investment strategy and may vary in the future. Current and future portfolio holdings are subject to risk and may change at any time.
Credit Quality Explanation [Text Block]
Ratings are from Moody’s Investors Service, Inc. If not available, we have used S&P Global Ratings. In the absence of ratings from these agencies, we have used Fitch Ratings, Inc. “Not rated” securities are those with no ratings available from these agencies. All ratings are as of 6-30-26 and do not reflect subsequent downgrades or upgrades, if any.
Credit Ratings Selection [Text Block] Ratings are from Moody’s Investors Service, Inc. If not available, we have used S&P Global Ratings. In the absence of ratings from these agencies, we have used Fitch Ratings, Inc.
C000022419 [Member]  
Shareholder Report [Line Items]  
Fund Name Opportunistic Fixed Income Trust
Class Name Series I
Trading Symbol JAEJX
Annual or Semi-Annual Statement [Text Block] This semiannual shareholder report contains important information about the Opportunistic Fixed Income Trust (the fund) for the period of January 1, 2026 to June 30, 2026.
Shareholder Report Annual or Semi-Annual semi-annual shareholder report
Additional Information [Text Block] You can find additional information about the fund at dfinview.com/johnhancock?site=funds. You can also request this information by contacting us at 800-344-1029 for John Hancock Variable Annuities and 800-732-5543 for John Hancock Variable Life Insurance.
Additional Information Phone Number 800-344-1029800-732-5543
Additional Information Website dfinview.com/johnhancock?site=funds
Expenses [Text Block]
What were the fund costs during the last six months ?
(Based on a hypothetical $10,000 investment)
Fund (Class) Costs of a $10,000 investment Costs paid as a percentage
of a $10,000 investment
Opportunistic Fixed Income Trust
(Series I/JAEJX)
$41 0.82%
Expenses Paid, Amount $ 41
Expense Ratio, Percent 0.82%
Net Assets $ 143,922,886
Holdings Count | Holding 1,248
Investment Company Portfolio Turnover 131.00%
Additional Fund Statistics [Text Block]
Fund Statistics
Fund net assets $143,922,886
Total number of portfolio holdings 1,248
Portfolio turnover rate 131%
Holdings [Text Block]
Graphical Representation of Holdings
The tables below show the investment makeup of the fund, representing a percentage of the total investments of the fund.
Portfolio Composition
Foreign government obligations 35.3%
U.S. Government Agency 20.2%
Corporate bonds 12.3%
U.S. Government 9.3%
Convertible bonds 7.7%
Asset-backed securities 2.8%
Term loans 2.8%
Collateralized mortgage obligations – Commercial and residential 2.7%
Collateralized mortgage obligations – U.S. Government Agency 2.0%
Preferred securities 1.8%
Exchange-traded funds 0.1%
Short-term investments 3.0%
Country Composition
United States 58.6%
Brazil 6.6%
Colombia 4.0%
South Korea 4.0%
Japan 2.8%
Czech Republic 2.6%
Mexico 2.5%
Indonesia 2.0%
United Kingdom 1.5%
New Zealand 1.5%
Other countries 13.9%
Quality Composition
Graphical Representation - Allocation 2 Chart
Ratings are from Moody’s Investors Service, Inc. If not available, we have used S&P Global Ratings. In the absence of ratings from these agencies, we have used Fitch Ratings, Inc. “Not rated” securities are those with no ratings available from these agencies. All ratings are as of 6-30-26 and do not reflect subsequent downgrades or upgrades, if any.
Holdings may not have been held by the fund for the entire period and are subject to change without notice. Portfolio composition is subject to review in accordance with the fund’s investment strategy and may vary in the future. Current and future portfolio holdings are subject to risk and may change at any time.
Credit Quality Explanation [Text Block]
Ratings are from Moody’s Investors Service, Inc. If not available, we have used S&P Global Ratings. In the absence of ratings from these agencies, we have used Fitch Ratings, Inc. “Not rated” securities are those with no ratings available from these agencies. All ratings are as of 6-30-26 and do not reflect subsequent downgrades or upgrades, if any.
Credit Ratings Selection [Text Block] Ratings are from Moody’s Investors Service, Inc. If not available, we have used S&P Global Ratings. In the absence of ratings from these agencies, we have used Fitch Ratings, Inc.
C000022431 [Member]  
Shareholder Report [Line Items]  
Fund Name Active Bond Trust
Class Name Series I
Trading Symbol JAHFX
Annual or Semi-Annual Statement [Text Block] This semiannual shareholder report contains important information about the Active Bond Trust (the fund) for the period of January 1, 2026 to June 30, 2026.
Shareholder Report Annual or Semi-Annual semi-annual shareholder report
Additional Information [Text Block] You can find additional information about the fund at dfinview.com/johnhancock?site=funds. You can also request this information by contacting us at 800-344-1029 for John Hancock Variable Annuities and 800-732-5543 for John Hancock Variable Life Insurance.
Additional Information Phone Number 800-344-1029800-732-5543
Additional Information Website dfinview.com/johnhancock?site=funds
Expenses [Text Block]
What were the fund costs during the last six months ?
(Based on a hypothetical $10,000 investment)
Fund (Class) Costs of a $10,000 investment Costs paid as a percentage
of a $10,000 investment
Active Bond Trust
(Series I/JAHFX)
$35 0.70%
Expenses Paid, Amount $ 35
Expense Ratio, Percent 0.70%
Net Assets $ 559,715,250
Holdings Count | Holding 1,115
Investment Company Portfolio Turnover 49.00%
Additional Fund Statistics [Text Block]
Fund Statistics
Fund net assets $559,715,250
Total number of portfolio holdings 1,115
Portfolio turnover rate 49%
Holdings [Text Block]
Graphical Representation of Holdings
The tables below show the investment makeup of the fund, representing a percentage of the total net assets of the fund.
Portfolio Composition
Corporate bonds 41.0%
U.S. Government Agency 30.7%
U.S. Government 12.7%
Asset-backed securities 6.3%
Collateralized mortgage obligations – Commercial and residential 5.5%
Collateralized mortgage obligations – U.S. Government Agency 1.0%
Term loans 0.4%
Preferred securities 0.2%
Foreign government obligations 0.2%
Short-term investments and other 2.0%
Quality Composition
Graphical Representation - Allocation 1 Chart
Ratings are from Moody’s Investors Service, Inc. If not available, we have used S&P Global Ratings. In the absence of ratings from these agencies, we have used Fitch Ratings, Inc. “Not rated” securities are those with no ratings available from these agencies. All ratings are as of 6-30-26 and do not reflect subsequent downgrades or upgrades, if any.
Holdings may not have been held by the fund for the entire period and are subject to change without notice. Portfolio composition is subject to review in accordance with the fund’s investment strategy and may vary in the future. Current and future portfolio holdings are subject to risk and may change at any time.
Credit Quality Explanation [Text Block]
Ratings are from Moody’s Investors Service, Inc. If not available, we have used S&P Global Ratings. In the absence of ratings from these agencies, we have used Fitch Ratings, Inc. “Not rated” securities are those with no ratings available from these agencies. All ratings are as of 6-30-26 and do not reflect subsequent downgrades or upgrades, if any.
Credit Ratings Selection [Text Block] Ratings are from Moody’s Investors Service, Inc. If not available, we have used S&P Global Ratings. In the absence of ratings from these agencies, we have used Fitch Ratings, Inc.
C000022432 [Member]  
Shareholder Report [Line Items]  
Fund Name Active Bond Trust
Class Name Series II
Trading Symbol JAHEX
Annual or Semi-Annual Statement [Text Block] This semiannual shareholder report contains important information about the Active Bond Trust (the fund) for the period of January 1, 2026 to June 30, 2026.
Shareholder Report Annual or Semi-Annual semi-annual shareholder report
Additional Information [Text Block] You can find additional information about the fund at dfinview.com/johnhancock?site=funds. You can also request this information by contacting us at 800-344-1029 for John Hancock Variable Annuities and 800-732-5543 for John Hancock Variable Life Insurance.
Additional Information Phone Number 800-344-1029800-732-5543
Additional Information Website dfinview.com/johnhancock?site=funds
Expenses [Text Block]
What were the fund costs during the last six months ?
(Based on a hypothetical $10,000 investment)
Fund (Class) Costs of a $10,000 investment Costs paid as a percentage
of a $10,000 investment
Active Bond Trust
(Series II/JAHEX)
$45 0.90%
Expenses Paid, Amount $ 45
Expense Ratio, Percent 0.90%
Net Assets $ 559,715,250
Holdings Count | Holding 1,115
Investment Company Portfolio Turnover 49.00%
Additional Fund Statistics [Text Block]
Fund Statistics
Fund net assets $559,715,250
Total number of portfolio holdings 1,115
Portfolio turnover rate 49%
Holdings [Text Block]
Graphical Representation of Holdings
The tables below show the investment makeup of the fund, representing a percentage of the total net assets of the fund.
Portfolio Composition
Corporate bonds 41.0%
U.S. Government Agency 30.7%
U.S. Government 12.7%
Asset-backed securities 6.3%
Collateralized mortgage obligations – Commercial and residential 5.5%
Collateralized mortgage obligations – U.S. Government Agency 1.0%
Term loans 0.4%
Preferred securities 0.2%
Foreign government obligations 0.2%
Short-term investments and other 2.0%
Quality Composition
Graphical Representation - Allocation 1 Chart
Ratings are from Moody’s Investors Service, Inc. If not available, we have used S&P Global Ratings. In the absence of ratings from these agencies, we have used Fitch Ratings, Inc. “Not rated” securities are those with no ratings available from these agencies. All ratings are as of 6-30-26 and do not reflect subsequent downgrades or upgrades, if any.
Holdings may not have been held by the fund for the entire period and are subject to change without notice. Portfolio composition is subject to review in accordance with the fund’s investment strategy and may vary in the future. Current and future portfolio holdings are subject to risk and may change at any time.
Credit Quality Explanation [Text Block]
Ratings are from Moody’s Investors Service, Inc. If not available, we have used S&P Global Ratings. In the absence of ratings from these agencies, we have used Fitch Ratings, Inc. “Not rated” securities are those with no ratings available from these agencies. All ratings are as of 6-30-26 and do not reflect subsequent downgrades or upgrades, if any.
Credit Ratings Selection [Text Block] Ratings are from Moody’s Investors Service, Inc. If not available, we have used S&P Global Ratings. In the absence of ratings from these agencies, we have used Fitch Ratings, Inc.
C000022430 [Member]  
Shareholder Report [Line Items]  
Fund Name Active Bond Trust
Class Name Series NAV
Trading Symbol JAHDX
Annual or Semi-Annual Statement [Text Block] This semiannual shareholder report contains important information about the Active Bond Trust (the fund) for the period of January 1, 2026 to June 30, 2026.
Shareholder Report Annual or Semi-Annual semi-annual shareholder report
Additional Information [Text Block] You can find additional information about the fund at dfinview.com/johnhancock?site=funds. You can also request this information by contacting us at 800-344-1029 for John Hancock Variable Annuities and 800-732-5543 for John Hancock Variable Life Insurance.
Additional Information Phone Number 800-344-1029800-732-5543
Additional Information Website dfinview.com/johnhancock?site=funds
Expenses [Text Block]
What were the fund costs during the last six months ?
(Based on a hypothetical $10,000 investment)
Fund (Class) Costs of a $10,000 investment Costs paid as a percentage
of a $10,000 investment
Active Bond Trust
(Series NAV/JAHDX)
$32 0.65%
Expenses Paid, Amount $ 32
Expense Ratio, Percent 0.65%
Net Assets $ 559,715,250
Holdings Count | Holding 1,115
Investment Company Portfolio Turnover 49.00%
Additional Fund Statistics [Text Block]
Fund Statistics
Fund net assets $559,715,250
Total number of portfolio holdings 1,115
Portfolio turnover rate 49%
Holdings [Text Block]
Graphical Representation of Holdings
The tables below show the investment makeup of the fund, representing a percentage of the total net assets of the fund.
Portfolio Composition
Corporate bonds 41.0%
U.S. Government Agency 30.7%
U.S. Government 12.7%
Asset-backed securities 6.3%
Collateralized mortgage obligations – Commercial and residential 5.5%
Collateralized mortgage obligations – U.S. Government Agency 1.0%
Term loans 0.4%
Preferred securities 0.2%
Foreign government obligations 0.2%
Short-term investments and other 2.0%
Quality Composition
Graphical Representation - Allocation 1 Chart
Ratings are from Moody’s Investors Service, Inc. If not available, we have used S&P Global Ratings. In the absence of ratings from these agencies, we have used Fitch Ratings, Inc. “Not rated” securities are those with no ratings available from these agencies. All ratings are as of 6-30-26 and do not reflect subsequent downgrades or upgrades, if any.
Holdings may not have been held by the fund for the entire period and are subject to change without notice. Portfolio composition is subject to review in accordance with the fund’s investment strategy and may vary in the future. Current and future portfolio holdings are subject to risk and may change at any time.
Credit Quality Explanation [Text Block]
Ratings are from Moody’s Investors Service, Inc. If not available, we have used S&P Global Ratings. In the absence of ratings from these agencies, we have used Fitch Ratings, Inc. “Not rated” securities are those with no ratings available from these agencies. All ratings are as of 6-30-26 and do not reflect subsequent downgrades or upgrades, if any.
Credit Ratings Selection [Text Block] Ratings are from Moody’s Investors Service, Inc. If not available, we have used S&P Global Ratings. In the absence of ratings from these agencies, we have used Fitch Ratings, Inc.
C000022446 [Member]  
Shareholder Report [Line Items]  
Fund Name High Yield Trust
Class Name Series NAV
Trading Symbol JAEMX
Annual or Semi-Annual Statement [Text Block] This semiannual shareholder report contains important information about the High Yield Trust (the fund) for the period of January 1, 2026 to June 30, 2026.
Shareholder Report Annual or Semi-Annual semi-annual shareholder report
Additional Information [Text Block] You can find additional information about the fund at dfinview.com/johnhancock?site=funds. You can also request this information by contacting us at 800-344-1029 for John Hancock Variable Annuities and 800-732-5543 for John Hancock Variable Life Insurance.
Additional Information Phone Number 800-344-1029800-732-5543
Additional Information Website dfinview.com/johnhancock?site=funds
Expenses [Text Block]
What were the fund costs during the last six months ?
(Based on a hypothetical $10,000 investment)
Fund (Class) Costs of a $10,000 investment Costs paid as a percentage
of a $10,000 investment
High Yield Trust
(Series NAV/JAEMX)
$30 0.59%
Expenses Paid, Amount $ 30
Expense Ratio, Percent 0.59%
Net Assets $ 180,379,004
Holdings Count | Holding 610
Investment Company Portfolio Turnover 15.00%
Additional Fund Statistics [Text Block]
Fund Statistics
Fund net assets $180,379,004
Total number of portfolio holdings 610
Portfolio turnover rate 15%
Holdings [Text Block]
Graphical Representation of Holdings
The tables below show the investment makeup of the fund, representing a percentage of the total net assets of the fund.
Portfolio Composition
Corporate bonds 94.8%
Term loans 0.8%
Preferred securities 0.3%
Short-term investments and other 4.1%
Quality Composition
Graphical Representation - Allocation 1 Chart
Ratings are from Moody’s Investors Service, Inc. If not available, we have used S&P Global Ratings. In the absence of ratings from these agencies, we have used Fitch Ratings, Inc. “Not rated” securities are those with no ratings available from these agencies. All ratings are as of 6-30-26 and do not reflect subsequent downgrades or upgrades, if any.
Holdings may not have been held by the fund for the entire period and are subject to change without notice. Portfolio composition is subject to review in accordance with the fund’s investment strategy and may vary in the future. Current and future portfolio holdings are subject to risk and may change at any time.
Credit Quality Explanation [Text Block]
Ratings are from Moody’s Investors Service, Inc. If not available, we have used S&P Global Ratings. In the absence of ratings from these agencies, we have used Fitch Ratings, Inc. “Not rated” securities are those with no ratings available from these agencies. All ratings are as of 6-30-26 and do not reflect subsequent downgrades or upgrades, if any.
Credit Ratings Selection [Text Block] Ratings are from Moody’s Investors Service, Inc. If not available, we have used S&P Global Ratings. In the absence of ratings from these agencies, we have used Fitch Ratings, Inc.
C000022448 [Member]  
Shareholder Report [Line Items]  
Fund Name High Yield Trust
Class Name Series II
Trading Symbol JAEOX
Annual or Semi-Annual Statement [Text Block] This semiannual shareholder report contains important information about the High Yield Trust (the fund) for the period of January 1, 2026 to June 30, 2026.
Shareholder Report Annual or Semi-Annual semi-annual shareholder report
Additional Information [Text Block] You can find additional information about the fund at dfinview.com/johnhancock?site=funds. You can also request this information by contacting us at 800-344-1029 for John Hancock Variable Annuities and 800-732-5543 for John Hancock Variable Life Insurance.
Additional Information Phone Number 800-344-1029800-732-5543
Additional Information Website dfinview.com/johnhancock?site=funds
Expenses [Text Block]
What were the fund costs during the last six months ?
(Based on a hypothetical $10,000 investment)
Fund (Class) Costs of a $10,000 investment Costs paid as a percentage
of a $10,000 investment
High Yield Trust
(Series II/JAEOX)
$42 0.84%
Expenses Paid, Amount $ 42
Expense Ratio, Percent 0.84%
Net Assets $ 180,379,004
Holdings Count | Holding 610
Investment Company Portfolio Turnover 15.00%
Additional Fund Statistics [Text Block]
Fund Statistics
Fund net assets $180,379,004
Total number of portfolio holdings 610
Portfolio turnover rate 15%
Holdings [Text Block]
Graphical Representation of Holdings
The tables below show the investment makeup of the fund, representing a percentage of the total net assets of the fund.
Portfolio Composition
Corporate bonds 94.8%
Term loans 0.8%
Preferred securities 0.3%
Short-term investments and other 4.1%
Quality Composition
Graphical Representation - Allocation 1 Chart
Ratings are from Moody’s Investors Service, Inc. If not available, we have used S&P Global Ratings. In the absence of ratings from these agencies, we have used Fitch Ratings, Inc. “Not rated” securities are those with no ratings available from these agencies. All ratings are as of 6-30-26 and do not reflect subsequent downgrades or upgrades, if any.
Holdings may not have been held by the fund for the entire period and are subject to change without notice. Portfolio composition is subject to review in accordance with the fund’s investment strategy and may vary in the future. Current and future portfolio holdings are subject to risk and may change at any time.
Credit Quality Explanation [Text Block]
Ratings are from Moody’s Investors Service, Inc. If not available, we have used S&P Global Ratings. In the absence of ratings from these agencies, we have used Fitch Ratings, Inc. “Not rated” securities are those with no ratings available from these agencies. All ratings are as of 6-30-26 and do not reflect subsequent downgrades or upgrades, if any.
Credit Ratings Selection [Text Block] Ratings are from Moody’s Investors Service, Inc. If not available, we have used S&P Global Ratings. In the absence of ratings from these agencies, we have used Fitch Ratings, Inc.
C000022447 [Member]  
Shareholder Report [Line Items]  
Fund Name High Yield Trust
Class Name Series I
Trading Symbol JAELX
Annual or Semi-Annual Statement [Text Block] This semiannual shareholder report contains important information about the High Yield Trust (the fund) for the period of January 1, 2026 to June 30, 2026.
Shareholder Report Annual or Semi-Annual semi-annual shareholder report
Additional Information [Text Block] You can find additional information about the fund at dfinview.com/johnhancock?site=funds. You can also request this information by contacting us at 800-344-1029 for John Hancock Variable Annuities and 800-732-5543 for John Hancock Variable Life Insurance.
Additional Information Phone Number 800-344-1029800-732-5543
Additional Information Website dfinview.com/johnhancock?site=funds
Expenses [Text Block]
What were the fund costs during the last six months ?
(Based on a hypothetical $10,000 investment)
Fund (Class) Costs of a $10,000 investment Costs paid as a percentage
of a $10,000 investment
High Yield Trust
(Series I/JAELX)
$32 0.64%
Expenses Paid, Amount $ 32
Expense Ratio, Percent 0.64%
Net Assets $ 180,379,004
Holdings Count | Holding 610
Investment Company Portfolio Turnover 15.00%
Additional Fund Statistics [Text Block]
Fund Statistics
Fund net assets $180,379,004
Total number of portfolio holdings 610
Portfolio turnover rate 15%
Holdings [Text Block]
Graphical Representation of Holdings
The tables below show the investment makeup of the fund, representing a percentage of the total net assets of the fund.
Portfolio Composition
Corporate bonds 94.8%
Term loans 0.8%
Preferred securities 0.3%
Short-term investments and other 4.1%
Quality Composition
Graphical Representation - Allocation 1 Chart
Ratings are from Moody’s Investors Service, Inc. If not available, we have used S&P Global Ratings. In the absence of ratings from these agencies, we have used Fitch Ratings, Inc. “Not rated” securities are those with no ratings available from these agencies. All ratings are as of 6-30-26 and do not reflect subsequent downgrades or upgrades, if any.
Holdings may not have been held by the fund for the entire period and are subject to change without notice. Portfolio composition is subject to review in accordance with the fund’s investment strategy and may vary in the future. Current and future portfolio holdings are subject to risk and may change at any time.
Credit Quality Explanation [Text Block]
Ratings are from Moody’s Investors Service, Inc. If not available, we have used S&P Global Ratings. In the absence of ratings from these agencies, we have used Fitch Ratings, Inc. “Not rated” securities are those with no ratings available from these agencies. All ratings are as of 6-30-26 and do not reflect subsequent downgrades or upgrades, if any.
Credit Ratings Selection [Text Block] Ratings are from Moody’s Investors Service, Inc. If not available, we have used S&P Global Ratings. In the absence of ratings from these agencies, we have used Fitch Ratings, Inc.
C000022568 [Member]  
Shareholder Report [Line Items]  
Fund Name Investment Quality Bond Trust
Class Name Series I
Trading Symbol JADUX
Annual or Semi-Annual Statement [Text Block] This semiannual shareholder report contains important information about the Investment Quality Bond Trust (the fund) for the period of January 1, 2026 to June 30, 2026.
Shareholder Report Annual or Semi-Annual semi-annual shareholder report
Additional Information [Text Block] You can find additional information about the fund at dfinview.com/johnhancock?site=funds. You can also request this information by contacting us at 800-344-1029 for John Hancock Variable Annuities and 800-732-5543 for John Hancock Variable Life Insurance.
Additional Information Phone Number 800-344-1029800-732-5543
Additional Information Website dfinview.com/johnhancock?site=funds
Expenses [Text Block]
What were the fund costs during the last six months ?
(Based on a hypothetical $10,000 investment)
Fund (Class) Costs of a $10,000 investment Costs paid as a percentage
of a $10,000 investment
Investment Quality Bond Trust
(Series I/JADUX)
$38 0.76%
Expenses Paid, Amount $ 38
Expense Ratio, Percent 0.76%
Net Assets $ 210,536,558
Holdings Count | Holding 841
Investment Company Portfolio Turnover 45.00%
Additional Fund Statistics [Text Block]
Fund Statistics
Fund net assets $210,536,558
Total number of portfolio holdings 841
Portfolio turnover rate 45%
Holdings [Text Block]
Graphical Representation of Holdings
The tables below show the investment makeup of the fund, representing a percentage of the total investments of the fund.
Portfolio Composition
U.S. Government Agency 33.1%
U.S. Government 28.2%
Corporate bonds 14.3%
Collateralized mortgage obligations – Commercial and residential 11.4%
Asset-backed securities 6.3%
Collateralized mortgage obligations – U.S. Government Agency 3.4%
Foreign government obligations 1.1%
Term loans 0.7%
Municipal bonds 0.1%
Short-term investments 1.4%
Quality Composition
Graphical Representation - Allocation 1 Chart
Ratings are from Moody’s Investors Service, Inc. If not available, we have used S&P Global Ratings. In the absence of ratings from these agencies, we have used Fitch Ratings, Inc. “Not rated” securities are those with no ratings available from these agencies. All ratings are as of 6-30-26 and do not reflect subsequent downgrades or upgrades, if any.
Holdings may not have been held by the fund for the entire period and are subject to change without notice. Portfolio composition is subject to review in accordance with the fund’s investment strategy and may vary in the future. Current and future portfolio holdings are subject to risk and may change at any time.
Credit Quality Explanation [Text Block]
Ratings are from Moody’s Investors Service, Inc. If not available, we have used S&P Global Ratings. In the absence of ratings from these agencies, we have used Fitch Ratings, Inc. “Not rated” securities are those with no ratings available from these agencies. All ratings are as of 6-30-26 and do not reflect subsequent downgrades or upgrades, if any.
Credit Ratings Selection [Text Block] Ratings are from Moody’s Investors Service, Inc. If not available, we have used S&P Global Ratings. In the absence of ratings from these agencies, we have used Fitch Ratings, Inc.
C000022569 [Member]  
Shareholder Report [Line Items]  
Fund Name Investment Quality Bond Trust
Class Name Series II
Trading Symbol JADSX
Annual or Semi-Annual Statement [Text Block] This semiannual shareholder report contains important information about the Investment Quality Bond Trust (the fund) for the period of January 1, 2026 to June 30, 2026.
Shareholder Report Annual or Semi-Annual semi-annual shareholder report
Additional Information [Text Block] You can find additional information about the fund at dfinview.com/johnhancock?site=funds. You can also request this information by contacting us at 800-344-1029 for John Hancock Variable Annuities and 800-732-5543 for John Hancock Variable Life Insurance.
Additional Information Phone Number 800-344-1029800-732-5543
Additional Information Website dfinview.com/johnhancock?site=funds
Expenses [Text Block]
What were the fund costs during the last six months ?
(Based on a hypothetical $10,000 investment)
Fund (Class) Costs of a $10,000 investment Costs paid as a percentage
of a $10,000 investment
Investment Quality Bond Trust
(Series II/JADSX)
$48 0.96%
Expenses Paid, Amount $ 48
Expense Ratio, Percent 0.96%
Net Assets $ 210,536,558
Holdings Count | Holding 841
Investment Company Portfolio Turnover 45.00%
Additional Fund Statistics [Text Block]
Fund Statistics
Fund net assets $210,536,558
Total number of portfolio holdings 841
Portfolio turnover rate 45%
Holdings [Text Block]
Graphical Representation of Holdings
The tables below show the investment makeup of the fund, representing a percentage of the total investments of the fund.
Portfolio Composition
U.S. Government Agency 33.1%
U.S. Government 28.2%
Corporate bonds 14.3%
Collateralized mortgage obligations – Commercial and residential 11.4%
Asset-backed securities 6.3%
Collateralized mortgage obligations – U.S. Government Agency 3.4%
Foreign government obligations 1.1%
Term loans 0.7%
Municipal bonds 0.1%
Short-term investments 1.4%
Quality Composition
Graphical Representation - Allocation 1 Chart
Ratings are from Moody’s Investors Service, Inc. If not available, we have used S&P Global Ratings. In the absence of ratings from these agencies, we have used Fitch Ratings, Inc. “Not rated” securities are those with no ratings available from these agencies. All ratings are as of 6-30-26 and do not reflect subsequent downgrades or upgrades, if any.
Holdings may not have been held by the fund for the entire period and are subject to change without notice. Portfolio composition is subject to review in accordance with the fund’s investment strategy and may vary in the future. Current and future portfolio holdings are subject to risk and may change at any time.
Credit Quality Explanation [Text Block]
Ratings are from Moody’s Investors Service, Inc. If not available, we have used S&P Global Ratings. In the absence of ratings from these agencies, we have used Fitch Ratings, Inc. “Not rated” securities are those with no ratings available from these agencies. All ratings are as of 6-30-26 and do not reflect subsequent downgrades or upgrades, if any.
Credit Ratings Selection [Text Block] Ratings are from Moody’s Investors Service, Inc. If not available, we have used S&P Global Ratings. In the absence of ratings from these agencies, we have used Fitch Ratings, Inc.
C000022567 [Member]  
Shareholder Report [Line Items]  
Fund Name Investment Quality Bond Trust
Class Name Series NAV
Trading Symbol JAJNX
Annual or Semi-Annual Statement [Text Block] This semiannual shareholder report contains important information about the Investment Quality Bond Trust (the fund) for the period of January 1, 2026 to June 30, 2026.
Shareholder Report Annual or Semi-Annual semi-annual shareholder report
Additional Information [Text Block] You can find additional information about the fund at dfinview.com/johnhancock?site=funds. You can also request this information by contacting us at 800-344-1029 for John Hancock Variable Annuities and 800-732-5543 for John Hancock Variable Life Insurance.
Additional Information Phone Number 800-344-1029800-732-5543
Additional Information Website dfinview.com/johnhancock?site=funds
Expenses [Text Block]
What were the fund costs during the last six months ?
(Based on a hypothetical $10,000 investment)
Fund (Class) Costs of a $10,000 investment Costs paid as a percentage
of a $10,000 investment
Investment Quality Bond Trust
(Series NAV/JAJNX)
$35 0.71%
Expenses Paid, Amount $ 35
Expense Ratio, Percent 0.71%
Net Assets $ 210,536,558
Holdings Count | Holding 841
Investment Company Portfolio Turnover 45.00%
Additional Fund Statistics [Text Block]
Fund Statistics
Fund net assets $210,536,558
Total number of portfolio holdings 841
Portfolio turnover rate 45%
Holdings [Text Block]
Graphical Representation of Holdings
The tables below show the investment makeup of the fund, representing a percentage of the total investments of the fund.
Portfolio Composition
U.S. Government Agency 33.1%
U.S. Government 28.2%
Corporate bonds 14.3%
Collateralized mortgage obligations – Commercial and residential 11.4%
Asset-backed securities 6.3%
Collateralized mortgage obligations – U.S. Government Agency 3.4%
Foreign government obligations 1.1%
Term loans 0.7%
Municipal bonds 0.1%
Short-term investments 1.4%
Quality Composition
Graphical Representation - Allocation 1 Chart
Ratings are from Moody’s Investors Service, Inc. If not available, we have used S&P Global Ratings. In the absence of ratings from these agencies, we have used Fitch Ratings, Inc. “Not rated” securities are those with no ratings available from these agencies. All ratings are as of 6-30-26 and do not reflect subsequent downgrades or upgrades, if any.
Holdings may not have been held by the fund for the entire period and are subject to change without notice. Portfolio composition is subject to review in accordance with the fund’s investment strategy and may vary in the future. Current and future portfolio holdings are subject to risk and may change at any time.
Credit Quality Explanation [Text Block]
Ratings are from Moody’s Investors Service, Inc. If not available, we have used S&P Global Ratings. In the absence of ratings from these agencies, we have used Fitch Ratings, Inc. “Not rated” securities are those with no ratings available from these agencies. All ratings are as of 6-30-26 and do not reflect subsequent downgrades or upgrades, if any.
Credit Ratings Selection [Text Block] Ratings are from Moody’s Investors Service, Inc. If not available, we have used S&P Global Ratings. In the absence of ratings from these agencies, we have used Fitch Ratings, Inc.
C000022640 [Member]  
Shareholder Report [Line Items]  
Fund Name Money Market Trust
Class Name Series NAV
Trading Symbol JABXX
Annual or Semi-Annual Statement [Text Block] This semiannual shareholder report contains important information about the Money Market Trust (the fund) for the period of January 1, 2026 to June 30, 2026.
Shareholder Report Annual or Semi-Annual semi-annual shareholder report
Additional Information [Text Block] You can find additional information about the fund at dfinview.com/johnhancock?site=funds. You can also request this information by contacting us at 800-344-1029 for John Hancock Variable Annuities and 800-732-5543 for John Hancock Variable Life Insurance.
Additional Information Phone Number 800-344-1029800-732-5543
Additional Information Website dfinview.com/johnhancock?site=funds
Expenses [Text Block]
What were the fund costs during the last six months ?
(Based on a hypothetical $10,000 investment)
Fund (Class) Costs of a $10,000 investment Costs paid as a percentage
of a $10,000 investment
Money Market Trust
(Series NAV/JABXX)
$14 0.28%
Expenses Paid, Amount $ 14
Expense Ratio, Percent 0.28%
Net Assets $ 2,074,185,352
Holdings Count | Holding 108
Additional Fund Statistics [Text Block]
Fund Statistics
Fund net assets $2,074,185,352
Total number of portfolio holdings 108
Weighted Average Maturity 51 Days
Holdings [Text Block]
Graphical Representation of Holdings
The tables below show the investment makeup of the fund, representing a percentage of the total investments of the fund.
Portfolio Composition
U.S. Government Agency 49.1%
Repurchase agreement 41.6%
U.S. Government 9.3%
Maturity Composition
Graphical Representation - Allocation 1 Chart
Holdings may not have been held by the fund for the entire period and are subject to change without notice. Portfolio composition is subject to review in accordance with the fund’s investment strategy and may vary in the future. Current and future portfolio holdings are subject to risk and may change at any time.
C000022642 [Member]  
Shareholder Report [Line Items]  
Fund Name Money Market Trust
Class Name Series II
Trading Symbol JAAXX
Annual or Semi-Annual Statement [Text Block] This semiannual shareholder report contains important information about the Money Market Trust (the fund) for the period of January 1, 2026 to June 30, 2026.
Shareholder Report Annual or Semi-Annual semi-annual shareholder report
Additional Information [Text Block] You can find additional information about the fund at dfinview.com/johnhancock?site=funds. You can also request this information by contacting us at 800-344-1029 for John Hancock Variable Annuities and 800-732-5543 for John Hancock Variable Life Insurance.
Additional Information Phone Number 800-344-1029800-732-5543
Additional Information Website dfinview.com/johnhancock?site=funds
Expenses [Text Block]
What were the fund costs during the last six months ?
(Based on a hypothetical $10,000 investment)
Fund (Class) Costs of a $10,000 investment Costs paid as a percentage
of a $10,000 investment
Money Market Trust
(Series II/JAAXX)
$26 0.53%
Expenses Paid, Amount $ 26
Expense Ratio, Percent 0.53%
Net Assets $ 2,074,185,352
Holdings Count | Holding 108
Additional Fund Statistics [Text Block]
Fund Statistics
Fund net assets $2,074,185,352
Total number of portfolio holdings 108
Weighted Average Maturity 51 Days
Holdings [Text Block]
Graphical Representation of Holdings
The tables below show the investment makeup of the fund, representing a percentage of the total investments of the fund.
Portfolio Composition
U.S. Government Agency 49.1%
Repurchase agreement 41.6%
U.S. Government 9.3%
Maturity Composition
Graphical Representation - Allocation 1 Chart
Holdings may not have been held by the fund for the entire period and are subject to change without notice. Portfolio composition is subject to review in accordance with the fund’s investment strategy and may vary in the future. Current and future portfolio holdings are subject to risk and may change at any time.
C000022641 [Member]  
Shareholder Report [Line Items]  
Fund Name Money Market Trust
Class Name Series I
Trading Symbol JHOXX
Annual or Semi-Annual Statement [Text Block] This semiannual shareholder report contains important information about the Money Market Trust (the fund) for the period of January 1, 2026 to June 30, 2026.
Shareholder Report Annual or Semi-Annual semi-annual shareholder report
Additional Information [Text Block] You can find additional information about the fund at dfinview.com/johnhancock?site=funds. You can also request this information by contacting us at 800-344-1029 for John Hancock Variable Annuities and 800-732-5543 for John Hancock Variable Life Insurance.
Additional Information Phone Number 800-344-1029800-732-5543
Additional Information Website dfinview.com/johnhancock?site=funds
Expenses [Text Block]
What were the fund costs during the last six months ?
(Based on a hypothetical $10,000 investment)
Fund (Class) Costs of a $10,000 investment Costs paid as a percentage
of a $10,000 investment
Money Market Trust
(Series I/JHOXX)
$17 0.33%
Expenses Paid, Amount $ 17
Expense Ratio, Percent 0.33%
Net Assets $ 2,074,185,352
Holdings Count | Holding 108
Additional Fund Statistics [Text Block]
Fund Statistics
Fund net assets $2,074,185,352
Total number of portfolio holdings 108
Weighted Average Maturity 51 Days
Holdings [Text Block]
Graphical Representation of Holdings
The tables below show the investment makeup of the fund, representing a percentage of the total investments of the fund.
Portfolio Composition
U.S. Government Agency 49.1%
Repurchase agreement 41.6%
U.S. Government 9.3%
Maturity Composition
Graphical Representation - Allocation 1 Chart
Holdings may not have been held by the fund for the entire period and are subject to change without notice. Portfolio composition is subject to review in accordance with the fund’s investment strategy and may vary in the future. Current and future portfolio holdings are subject to risk and may change at any time.
C000022740 [Member]  
Shareholder Report [Line Items]  
Fund Name Strategic Income Opportunities Trust
Class Name Series I
Trading Symbol JESNX
Annual or Semi-Annual Statement [Text Block] This semiannual shareholder report contains important information about the Strategic Income Opportunities Trust (the fund) for the period of January 1, 2026 to June 30, 2026.
Shareholder Report Annual or Semi-Annual semi-annual shareholder report
Additional Information [Text Block] You can find additional information about the fund at dfinview.com/johnhancock?site=funds. You can also request this information by contacting us at 800-344-1029 for John Hancock Variable Annuities and 800-732-5543 for John Hancock Variable Life Insurance.
Additional Information Phone Number 800-344-1029800-732-5543
Additional Information Website dfinview.com/johnhancock?site=funds
Expenses [Text Block]
What were the fund costs during the last six months ?
(Based on a hypothetical $10,000 investment)
Fund (Class) Costs of a $10,000 investment Costs paid as a percentage
of a $10,000 investment
Strategic Income Opportunities Trust
(Series I/JESNX)
$39 0.78%
Expenses Paid, Amount $ 39
Expense Ratio, Percent 0.78%
Net Assets $ 300,355,856
Holdings Count | Holding 502
Investment Company Portfolio Turnover 24.00%
Additional Fund Statistics [Text Block]
Fund Statistics
Fund net assets $300,355,856
Total number of portfolio holdings 502
Portfolio turnover rate 24%
Holdings [Text Block]
Graphical Representation of Holdings
The tables below show the investment makeup of the fund, representing a percentage of the total net assets of the fund.
Portfolio Composition
Corporate bonds 43.1%
Foreign government obligations 16.6%
Term loans 12.1%
Preferred securities 5.7%
U.S. Government Agency 4.7%
U.S. Government 3.7%
Collateralized mortgage obligations – Commercial and residential 3.6%
Asset-backed securities 2.9%
Convertible bonds 1.7%
Collateralized mortgage obligations – U.S. Government Agency 1.6%
Short-term investments and other 4.3%
Quality Composition
Graphical Representation - Allocation 1 Chart
Ratings are from Moody’s Investors Service, Inc. If not available, we have used S&P Global Ratings. In the absence of ratings from these agencies, we have used Fitch Ratings, Inc. “Not rated” securities are those with no ratings available from these agencies. All ratings are as of 6-30-26 and do not reflect subsequent downgrades or upgrades, if any.
Holdings may not have been held by the fund for the entire period and are subject to change without notice. Portfolio composition is subject to review in accordance with the fund’s investment strategy and may vary in the future. Current and future portfolio holdings are subject to risk and may change at any time.
Credit Quality Explanation [Text Block]
Ratings are from Moody’s Investors Service, Inc. If not available, we have used S&P Global Ratings. In the absence of ratings from these agencies, we have used Fitch Ratings, Inc. “Not rated” securities are those with no ratings available from these agencies. All ratings are as of 6-30-26 and do not reflect subsequent downgrades or upgrades, if any.
Credit Ratings Selection [Text Block] Ratings are from Moody’s Investors Service, Inc. If not available, we have used S&P Global Ratings. In the absence of ratings from these agencies, we have used Fitch Ratings, Inc.
C000022741 [Member]  
Shareholder Report [Line Items]  
Fund Name Strategic Income Opportunities Trust
Class Name Series II
Trading Symbol JESPX
Annual or Semi-Annual Statement [Text Block] This semiannual shareholder report contains important information about the Strategic Income Opportunities Trust (the fund) for the period of January 1, 2026 to June 30, 2026.
Shareholder Report Annual or Semi-Annual semi-annual shareholder report
Additional Information [Text Block] You can find additional information about the fund at dfinview.com/johnhancock?site=funds. You can also request this information by contacting us at 800-344-1029 for John Hancock Variable Annuities and 800-732-5543 for John Hancock Variable Life Insurance.
Additional Information Phone Number 800-344-1029800-732-5543
Additional Information Website dfinview.com/johnhancock?site=funds
Expenses [Text Block]
What were the fund costs during the last six months ?
(Based on a hypothetical $10,000 investment)
Fund (Class) Costs of a $10,000 investment Costs paid as a percentage
of a $10,000 investment
Strategic Income Opportunities Trust
(Series II/JESPX)
$49 0.98%
Expenses Paid, Amount $ 49
Expense Ratio, Percent 0.98%
Net Assets $ 300,355,856
Holdings Count | Holding 502
Investment Company Portfolio Turnover 24.00%
Additional Fund Statistics [Text Block]
Fund Statistics
Fund net assets $300,355,856
Total number of portfolio holdings 502
Portfolio turnover rate 24%
Holdings [Text Block]
Graphical Representation of Holdings
The tables below show the investment makeup of the fund, representing a percentage of the total net assets of the fund.
Portfolio Composition
Corporate bonds 43.1%
Foreign government obligations 16.6%
Term loans 12.1%
Preferred securities 5.7%
U.S. Government Agency 4.7%
U.S. Government 3.7%
Collateralized mortgage obligations – Commercial and residential 3.6%
Asset-backed securities 2.9%
Convertible bonds 1.7%
Collateralized mortgage obligations – U.S. Government Agency 1.6%
Short-term investments and other 4.3%
Quality Composition
Graphical Representation - Allocation 1 Chart
Ratings are from Moody’s Investors Service, Inc. If not available, we have used S&P Global Ratings. In the absence of ratings from these agencies, we have used Fitch Ratings, Inc. “Not rated” securities are those with no ratings available from these agencies. All ratings are as of 6-30-26 and do not reflect subsequent downgrades or upgrades, if any.
Holdings may not have been held by the fund for the entire period and are subject to change without notice. Portfolio composition is subject to review in accordance with the fund’s investment strategy and may vary in the future. Current and future portfolio holdings are subject to risk and may change at any time.
Credit Quality Explanation [Text Block]
Ratings are from Moody’s Investors Service, Inc. If not available, we have used S&P Global Ratings. In the absence of ratings from these agencies, we have used Fitch Ratings, Inc. “Not rated” securities are those with no ratings available from these agencies. All ratings are as of 6-30-26 and do not reflect subsequent downgrades or upgrades, if any.
Credit Ratings Selection [Text Block] Ratings are from Moody’s Investors Service, Inc. If not available, we have used S&P Global Ratings. In the absence of ratings from these agencies, we have used Fitch Ratings, Inc.
C000022739 [Member]  
Shareholder Report [Line Items]  
Fund Name Strategic Income Opportunities Trust
Class Name Series NAV
Trading Symbol JVRNX
Annual or Semi-Annual Statement [Text Block] This semiannual shareholder report contains important information about the Strategic Income Opportunities Trust (the fund) for the period of January 1, 2026 to June 30, 2026.
Shareholder Report Annual or Semi-Annual semi-annual shareholder report
Additional Information [Text Block] You can find additional information about the fund at dfinview.com/johnhancock?site=funds. You can also request this information by contacting us at 800-344-1029 for John Hancock Variable Annuities and 800-732-5543 for John Hancock Variable Life Insurance.
Additional Information Phone Number 800-344-1029800-732-5543
Additional Information Website dfinview.com/johnhancock?site=funds
Expenses [Text Block]
What were the fund costs during the last six months ?
(Based on a hypothetical $10,000 investment)
Fund (Class) Costs of a $10,000 investment Costs paid as a percentage
of a $10,000 investment
Strategic Income Opportunities Trust
(Series NAV/JVRNX)
$36 0.73%
Expenses Paid, Amount $ 36
Expense Ratio, Percent 0.73%
Net Assets $ 300,355,856
Holdings Count | Holding 502
Investment Company Portfolio Turnover 24.00%
Additional Fund Statistics [Text Block]
Fund Statistics
Fund net assets $300,355,856
Total number of portfolio holdings 502
Portfolio turnover rate 24%
Holdings [Text Block]
Graphical Representation of Holdings
The tables below show the investment makeup of the fund, representing a percentage of the total net assets of the fund.
Portfolio Composition
Corporate bonds 43.1%
Foreign government obligations 16.6%
Term loans 12.1%
Preferred securities 5.7%
U.S. Government Agency 4.7%
U.S. Government 3.7%
Collateralized mortgage obligations – Commercial and residential 3.6%
Asset-backed securities 2.9%
Convertible bonds 1.7%
Collateralized mortgage obligations – U.S. Government Agency 1.6%
Short-term investments and other 4.3%
Quality Composition
Graphical Representation - Allocation 1 Chart
Ratings are from Moody’s Investors Service, Inc. If not available, we have used S&P Global Ratings. In the absence of ratings from these agencies, we have used Fitch Ratings, Inc. “Not rated” securities are those with no ratings available from these agencies. All ratings are as of 6-30-26 and do not reflect subsequent downgrades or upgrades, if any.
Holdings may not have been held by the fund for the entire period and are subject to change without notice. Portfolio composition is subject to review in accordance with the fund’s investment strategy and may vary in the future. Current and future portfolio holdings are subject to risk and may change at any time.
Credit Quality Explanation [Text Block]
Ratings are from Moody’s Investors Service, Inc. If not available, we have used S&P Global Ratings. In the absence of ratings from these agencies, we have used Fitch Ratings, Inc. “Not rated” securities are those with no ratings available from these agencies. All ratings are as of 6-30-26 and do not reflect subsequent downgrades or upgrades, if any.
Credit Ratings Selection [Text Block] Ratings are from Moody’s Investors Service, Inc. If not available, we have used S&P Global Ratings. In the absence of ratings from these agencies, we have used Fitch Ratings, Inc.
C000073237 [Member]  
Shareholder Report [Line Items]  
Fund Name Short Term Government Income Trust
Class Name Series NAV
Trading Symbol JAFYX
Annual or Semi-Annual Statement [Text Block] This semiannual shareholder report contains important information about the Short Term Government Income Trust (the fund) for the period of January 1, 2026 to June 30, 2026.
Shareholder Report Annual or Semi-Annual semi-annual shareholder report
Additional Information [Text Block] You can find additional information about the fund at dfinview.com/johnhancock?site=funds. You can also request this information by contacting us at 800-344-1029 for John Hancock Variable Annuities and 800-732-5543 for John Hancock Variable Life Insurance.
Additional Information Phone Number 800-344-1029800-732-5543
Additional Information Website dfinview.com/johnhancock?site=funds
Expenses [Text Block]
What were the fund costs during the last six months ?
(Based on a hypothetical $10,000 investment)
Fund (Class) Costs of a $10,000 investment Costs paid as a percentage
of a $10,000 investment
Short Term Government Income Trust
(Series NAV/JAFYX)
$32 0.64%
Expenses Paid, Amount $ 32
Expense Ratio, Percent 0.64%
Net Assets $ 247,741,609
Holdings Count | Holding 102
Investment Company Portfolio Turnover 241.00%
Additional Fund Statistics [Text Block]
Fund Statistics
Fund net assets $247,741,609
Total number of portfolio holdings 102
Portfolio turnover rate 241%
Holdings [Text Block]
Graphical Representation of Holdings
The tables below show the investment makeup of the fund, representing a percentage of the total net assets of the fund.
Portfolio Composition
U.S. Government Agency 50.9%
U.S. Government 46.7%
Municipal bonds 1.2%
Collateralized mortgage obligations – U.S. Government Agency 0.3%
Short-term investments and other 0.9%
Quality Composition
Graphical Representation - Allocation 1 Chart
Ratings are from Moody’s Investors Service, Inc. If not available, we have used S&P Global Ratings. In the absence of ratings from these agencies, we have used Fitch Ratings, Inc. “Not rated” securities are those with no ratings available from these agencies. All ratings are as of 6-30-26 and do not reflect subsequent downgrades or upgrades, if any.
Holdings may not have been held by the fund for the entire period and are subject to change without notice. Portfolio composition is subject to review in accordance with the fund’s investment strategy and may vary in the future. Current and future portfolio holdings are subject to risk and may change at any time.
Credit Quality Explanation [Text Block]
Ratings are from Moody’s Investors Service, Inc. If not available, we have used S&P Global Ratings. In the absence of ratings from these agencies, we have used Fitch Ratings, Inc. “Not rated” securities are those with no ratings available from these agencies. All ratings are as of 6-30-26 and do not reflect subsequent downgrades or upgrades, if any.
Credit Ratings Selection [Text Block] Ratings are from Moody’s Investors Service, Inc. If not available, we have used S&P Global Ratings. In the absence of ratings from these agencies, we have used Fitch Ratings, Inc.
C000073239 [Member]  
Shareholder Report [Line Items]  
Fund Name Short Term Government Income Trust
Class Name Series II
Trading Symbol JAFWX
Annual or Semi-Annual Statement [Text Block] This semiannual shareholder report contains important information about the Short Term Government Income Trust (the fund) for the period of January 1, 2026 to June 30, 2026.
Shareholder Report Annual or Semi-Annual semi-annual shareholder report
Additional Information [Text Block] You can find additional information about the fund at dfinview.com/johnhancock?site=funds. You can also request this information by contacting us at 800-344-1029 for John Hancock Variable Annuities and 800-732-5543 for John Hancock Variable Life Insurance.
Additional Information Phone Number 800-344-1029800-732-5543
Additional Information Website dfinview.com/johnhancock?site=funds
Expenses [Text Block]
What were the fund costs during the last six months ?
(Based on a hypothetical $10,000 investment)
Fund (Class) Costs of a $10,000 investment Costs paid as a percentage
of a $10,000 investment
Short Term Government Income Trust
(Series II/JAFWX)
$44 0.89%
Expenses Paid, Amount $ 44
Expense Ratio, Percent 0.89%
Net Assets $ 247,741,609
Holdings Count | Holding 102
Investment Company Portfolio Turnover 241.00%
Additional Fund Statistics [Text Block]
Fund Statistics
Fund net assets $247,741,609
Total number of portfolio holdings 102
Portfolio turnover rate 241%
Holdings [Text Block]
Graphical Representation of Holdings
The tables below show the investment makeup of the fund, representing a percentage of the total net assets of the fund.
Portfolio Composition
U.S. Government Agency 50.9%
U.S. Government 46.7%
Municipal bonds 1.2%
Collateralized mortgage obligations – U.S. Government Agency 0.3%
Short-term investments and other 0.9%
Quality Composition
Graphical Representation - Allocation 1 Chart
Ratings are from Moody’s Investors Service, Inc. If not available, we have used S&P Global Ratings. In the absence of ratings from these agencies, we have used Fitch Ratings, Inc. “Not rated” securities are those with no ratings available from these agencies. All ratings are as of 6-30-26 and do not reflect subsequent downgrades or upgrades, if any.
Holdings may not have been held by the fund for the entire period and are subject to change without notice. Portfolio composition is subject to review in accordance with the fund’s investment strategy and may vary in the future. Current and future portfolio holdings are subject to risk and may change at any time.
Credit Quality Explanation [Text Block]
Ratings are from Moody’s Investors Service, Inc. If not available, we have used S&P Global Ratings. In the absence of ratings from these agencies, we have used Fitch Ratings, Inc. “Not rated” securities are those with no ratings available from these agencies. All ratings are as of 6-30-26 and do not reflect subsequent downgrades or upgrades, if any.
Credit Ratings Selection [Text Block] Ratings are from Moody’s Investors Service, Inc. If not available, we have used S&P Global Ratings. In the absence of ratings from these agencies, we have used Fitch Ratings, Inc.
C000073238 [Member]  
Shareholder Report [Line Items]  
Fund Name Short Term Government Income Trust
Class Name Series I
Trading Symbol JAJPX
Annual or Semi-Annual Statement [Text Block] This semiannual shareholder report contains important information about the Short Term Government Income Trust (the fund) for the period of January 1, 2026 to June 30, 2026.
Shareholder Report Annual or Semi-Annual semi-annual shareholder report
Additional Information [Text Block] You can find additional information about the fund at dfinview.com/johnhancock?site=funds. You can also request this information by contacting us at 800-344-1029 for John Hancock Variable Annuities and 800-732-5543 for John Hancock Variable Life Insurance.
Additional Information Phone Number 800-344-1029800-732-5543
Additional Information Website dfinview.com/johnhancock?site=funds
Expenses [Text Block]
What were the fund costs during the last six months ?
(Based on a hypothetical $10,000 investment)
Fund (Class) Costs of a $10,000 investment Costs paid as a percentage
of a $10,000 investment
Short Term Government Income Trust
(Series I/JAJPX)
$34 0.69%
Expenses Paid, Amount $ 34
Expense Ratio, Percent 0.69%
Net Assets $ 247,741,609
Holdings Count | Holding 102
Investment Company Portfolio Turnover 241.00%
Additional Fund Statistics [Text Block]
Fund Statistics
Fund net assets $247,741,609
Total number of portfolio holdings 102
Portfolio turnover rate 241%
Holdings [Text Block]
Graphical Representation of Holdings
The tables below show the investment makeup of the fund, representing a percentage of the total net assets of the fund.
Portfolio Composition
U.S. Government Agency 50.9%
U.S. Government 46.7%
Municipal bonds 1.2%
Collateralized mortgage obligations – U.S. Government Agency 0.3%
Short-term investments and other 0.9%
Quality Composition
Graphical Representation - Allocation 1 Chart
Ratings are from Moody’s Investors Service, Inc. If not available, we have used S&P Global Ratings. In the absence of ratings from these agencies, we have used Fitch Ratings, Inc. “Not rated” securities are those with no ratings available from these agencies. All ratings are as of 6-30-26 and do not reflect subsequent downgrades or upgrades, if any.
Holdings may not have been held by the fund for the entire period and are subject to change without notice. Portfolio composition is subject to review in accordance with the fund’s investment strategy and may vary in the future. Current and future portfolio holdings are subject to risk and may change at any time.
Credit Quality Explanation [Text Block]
Ratings are from Moody’s Investors Service, Inc. If not available, we have used S&P Global Ratings. In the absence of ratings from these agencies, we have used Fitch Ratings, Inc. “Not rated” securities are those with no ratings available from these agencies. All ratings are as of 6-30-26 and do not reflect subsequent downgrades or upgrades, if any.
Credit Ratings Selection [Text Block] Ratings are from Moody’s Investors Service, Inc. If not available, we have used S&P Global Ratings. In the absence of ratings from these agencies, we have used Fitch Ratings, Inc.
C000078286 [Member]  
Shareholder Report [Line Items]  
Fund Name Select Bond Trust
Class Name Series I
Trading Symbol JAFZX
Annual or Semi-Annual Statement [Text Block] This semiannual shareholder report contains important information about the Select Bond Trust (the fund) for the period of January 1, 2026 to June 30, 2026.
Shareholder Report Annual or Semi-Annual semi-annual shareholder report
Additional Information [Text Block] You can find additional information about the fund at dfinview.com/johnhancock?site=funds. You can also request this information by contacting us at 800-344-1029 for John Hancock Variable Annuities and 800-732-5543 for John Hancock Variable Life Insurance.
Additional Information Phone Number 800-344-1029800-732-5543
Additional Information Website dfinview.com/johnhancock?site=funds
Expenses [Text Block]
What were the fund costs during the last six months ?
(Based on a hypothetical $10,000 investment)
Fund (Class) Costs of a $10,000 investment Costs paid as a percentage
of a $10,000 investment
Select Bond Trust
(Series I/JAFZX)
$33 0.66%
Expenses Paid, Amount $ 33
Expense Ratio, Percent 0.66%
Net Assets $ 503,715,682
Holdings Count | Holding 829
Investment Company Portfolio Turnover 83.00%
Additional Fund Statistics [Text Block]
Fund Statistics
Fund net assets $503,715,682
Total number of portfolio holdings 829
Portfolio turnover rate 83%
Holdings [Text Block]
Graphical Representation of Holdings
The tables below show the investment makeup of the fund, representing a percentage of the total net assets of the fund.
Portfolio Composition
Corporate bonds 32.3%
U.S. Government Agency 31.8%
U.S. Government 14.8%
Asset-backed securities 7.8%
Collateralized mortgage obligations – Commercial and residential 5.8%
Collateralized mortgage obligations – U.S. Government Agency 0.9%
Foreign government obligations 0.1%
Municipal bonds 0.1%
Short-term investments and other 6.4%
Quality Composition
Graphical Representation - Allocation 1 Chart
Ratings are from Moody’s Investors Service, Inc. If not available, we have used S&P Global Ratings. In the absence of ratings from these agencies, we have used Fitch Ratings, Inc. “Not rated” securities are those with no ratings available from these agencies. All ratings are as of 6-30-26 and do not reflect subsequent downgrades or upgrades, if any.
Holdings may not have been held by the fund for the entire period and are subject to change without notice. Portfolio composition is subject to review in accordance with the fund’s investment strategy and may vary in the future. Current and future portfolio holdings are subject to risk and may change at any time.
Credit Quality Explanation [Text Block]
Ratings are from Moody’s Investors Service, Inc. If not available, we have used S&P Global Ratings. In the absence of ratings from these agencies, we have used Fitch Ratings, Inc. “Not rated” securities are those with no ratings available from these agencies. All ratings are as of 6-30-26 and do not reflect subsequent downgrades or upgrades, if any.
Credit Ratings Selection [Text Block] Ratings are from Moody’s Investors Service, Inc. If not available, we have used S&P Global Ratings. In the absence of ratings from these agencies, we have used Fitch Ratings, Inc.
C000078287 [Member]  
Shareholder Report [Line Items]  
Fund Name Select Bond Trust
Class Name Series II
Trading Symbol JHBDX
Annual or Semi-Annual Statement [Text Block] This semiannual shareholder report contains important information about the Select Bond Trust (the fund) for the period of January 1, 2026 to June 30, 2026.
Shareholder Report Annual or Semi-Annual semi-annual shareholder report
Additional Information [Text Block] You can find additional information about the fund at dfinview.com/johnhancock?site=funds. You can also request this information by contacting us at 800-344-1029 for John Hancock Variable Annuities and 800-732-5543 for John Hancock Variable Life Insurance.
Additional Information Phone Number 800-344-1029800-732-5543
Additional Information Website dfinview.com/johnhancock?site=funds
Expenses [Text Block]
What were the fund costs during the last six months ?
(Based on a hypothetical $10,000 investment)
Fund (Class) Costs of a $10,000 investment Costs paid as a percentage
of a $10,000 investment
Select Bond Trust
(Series II/JHBDX)
$43 0.86%
Expenses Paid, Amount $ 43
Expense Ratio, Percent 0.86%
Net Assets $ 503,715,682
Holdings Count | Holding 829
Investment Company Portfolio Turnover 83.00%
Additional Fund Statistics [Text Block]
Fund Statistics
Fund net assets $503,715,682
Total number of portfolio holdings 829
Portfolio turnover rate 83%
Holdings [Text Block]
Graphical Representation of Holdings
The tables below show the investment makeup of the fund, representing a percentage of the total net assets of the fund.
Portfolio Composition
Corporate bonds 32.3%
U.S. Government Agency 31.8%
U.S. Government 14.8%
Asset-backed securities 7.8%
Collateralized mortgage obligations – Commercial and residential 5.8%
Collateralized mortgage obligations – U.S. Government Agency 0.9%
Foreign government obligations 0.1%
Municipal bonds 0.1%
Short-term investments and other 6.4%
Quality Composition
Graphical Representation - Allocation 1 Chart
Ratings are from Moody’s Investors Service, Inc. If not available, we have used S&P Global Ratings. In the absence of ratings from these agencies, we have used Fitch Ratings, Inc. “Not rated” securities are those with no ratings available from these agencies. All ratings are as of 6-30-26 and do not reflect subsequent downgrades or upgrades, if any.
Holdings may not have been held by the fund for the entire period and are subject to change without notice. Portfolio composition is subject to review in accordance with the fund’s investment strategy and may vary in the future. Current and future portfolio holdings are subject to risk and may change at any time.
Credit Quality Explanation [Text Block]
Ratings are from Moody’s Investors Service, Inc. If not available, we have used S&P Global Ratings. In the absence of ratings from these agencies, we have used Fitch Ratings, Inc. “Not rated” securities are those with no ratings available from these agencies. All ratings are as of 6-30-26 and do not reflect subsequent downgrades or upgrades, if any.
Credit Ratings Selection [Text Block] Ratings are from Moody’s Investors Service, Inc. If not available, we have used S&P Global Ratings. In the absence of ratings from these agencies, we have used Fitch Ratings, Inc.
C000078285 [Member]  
Shareholder Report [Line Items]  
Fund Name Select Bond Trust
Class Name Series NAV
Trading Symbol JAGBX
Annual or Semi-Annual Statement [Text Block] This semiannual shareholder report contains important information about the Select Bond Trust (the fund) for the period of January 1, 2026 to June 30, 2026.
Shareholder Report Annual or Semi-Annual semi-annual shareholder report
Additional Information [Text Block] You can find additional information about the fund at dfinview.com/johnhancock?site=funds. You can also request this information by contacting us at 800-344-1029 for John Hancock Variable Annuities and 800-732-5543 for John Hancock Variable Life Insurance.
Additional Information Phone Number 800-344-1029800-732-5543
Additional Information Website dfinview.com/johnhancock?site=funds
Expenses [Text Block]
What were the fund costs during the last six months ?
(Based on a hypothetical $10,000 investment)
Fund (Class) Costs of a $10,000 investment Costs paid as a percentage
of a $10,000 investment
Select Bond Trust
(Series NAV/JAGBX)
$31 0.62%
Expenses Paid, Amount $ 31
Expense Ratio, Percent 0.62%
Net Assets $ 503,715,682
Holdings Count | Holding 829
Investment Company Portfolio Turnover 83.00%
Additional Fund Statistics [Text Block]
Fund Statistics
Fund net assets $503,715,682
Total number of portfolio holdings 829
Portfolio turnover rate 83%
Holdings [Text Block]
Graphical Representation of Holdings
The tables below show the investment makeup of the fund, representing a percentage of the total net assets of the fund.
Portfolio Composition
Corporate bonds 32.3%
U.S. Government Agency 31.8%
U.S. Government 14.8%
Asset-backed securities 7.8%
Collateralized mortgage obligations – Commercial and residential 5.8%
Collateralized mortgage obligations – U.S. Government Agency 0.9%
Foreign government obligations 0.1%
Municipal bonds 0.1%
Short-term investments and other 6.4%
Quality Composition
Graphical Representation - Allocation 1 Chart
Ratings are from Moody’s Investors Service, Inc. If not available, we have used S&P Global Ratings. In the absence of ratings from these agencies, we have used Fitch Ratings, Inc. “Not rated” securities are those with no ratings available from these agencies. All ratings are as of 6-30-26 and do not reflect subsequent downgrades or upgrades, if any.
Holdings may not have been held by the fund for the entire period and are subject to change without notice. Portfolio composition is subject to review in accordance with the fund’s investment strategy and may vary in the future. Current and future portfolio holdings are subject to risk and may change at any time.
Credit Quality Explanation [Text Block]
Ratings are from Moody’s Investors Service, Inc. If not available, we have used S&P Global Ratings. In the absence of ratings from these agencies, we have used Fitch Ratings, Inc. “Not rated” securities are those with no ratings available from these agencies. All ratings are as of 6-30-26 and do not reflect subsequent downgrades or upgrades, if any.
Credit Ratings Selection [Text Block] Ratings are from Moody’s Investors Service, Inc. If not available, we have used S&P Global Ratings. In the absence of ratings from these agencies, we have used Fitch Ratings, Inc.
C000090651 [Member]  
Shareholder Report [Line Items]  
Fund Name Ultra Short Term Bond Trust
Class Name Series NAV
Trading Symbol JAGFX
Annual or Semi-Annual Statement [Text Block] This semiannual shareholder report contains important information about the Ultra Short Term Bond Trust (the fund) for the period of January 1, 2026 to June 30, 2026.
Shareholder Report Annual or Semi-Annual semi-annual shareholder report
Additional Information [Text Block] You can find additional information about the fund at dfinview.com/johnhancock?site=funds. You can also request this information by contacting us at 800-344-1029 for John Hancock Variable Annuities and 800-732-5543 for John Hancock Variable Life Insurance.
Additional Information Phone Number 800-344-1029800-732-5543
Additional Information Website dfinview.com/johnhancock?site=funds
Expenses [Text Block]
What were the fund costs during the last six months ?
(Based on a hypothetical $10,000 investment)
Fund (Class) Costs of a $10,000 investment Costs paid as a percentage
of a $10,000 investment
Ultra Short Term Bond Trust
(Series NAV/JAGFX)
$28 0.56%
Expenses Paid, Amount $ 28
Expense Ratio, Percent 0.56%
Net Assets $ 205,432,435
Holdings Count | Holding 211
Investment Company Portfolio Turnover 41.00%
Additional Fund Statistics [Text Block]
Fund Statistics
Fund net assets $205,432,435
Total number of portfolio holdings 211
Portfolio turnover rate 41%
Holdings [Text Block]
Graphical Representation of Holdings
The tables below show the investment makeup of the fund, representing a percentage of the total net assets of the fund.
Portfolio Composition
Corporate bonds 55.3%
Asset-backed securities 22.7%
U.S. Government Agency 0.4%
Collateralized mortgage obligations – U.S. Government Agency 0.2%
Short-term investments and other 21.4%
Quality Composition
Graphical Representation - Allocation 1 Chart
Ratings are from Moody’s Investors Service, Inc. If not available, we have used S&P Global Ratings. In the absence of ratings from these agencies, we have used Fitch Ratings, Inc. “Not rated” securities are those with no ratings available from these agencies. All ratings are as of 6-30-26 and do not reflect subsequent downgrades or upgrades, if any.
Holdings may not have been held by the fund for the entire period and are subject to change without notice. Portfolio composition is subject to review in accordance with the fund’s investment strategy and may vary in the future. Current and future portfolio holdings are subject to risk and may change at any time.
Credit Quality Explanation [Text Block]
Ratings are from Moody’s Investors Service, Inc. If not available, we have used S&P Global Ratings. In the absence of ratings from these agencies, we have used Fitch Ratings, Inc. “Not rated” securities are those with no ratings available from these agencies. All ratings are as of 6-30-26 and do not reflect subsequent downgrades or upgrades, if any.
Credit Ratings Selection [Text Block] Ratings are from Moody’s Investors Service, Inc. If not available, we have used S&P Global Ratings. In the absence of ratings from these agencies, we have used Fitch Ratings, Inc.
C000090650 [Member]  
Shareholder Report [Line Items]  
Fund Name Ultra Short Term Bond Trust
Class Name Series II
Trading Symbol JAGEX
Annual or Semi-Annual Statement [Text Block] This semiannual shareholder report contains important information about the Ultra Short Term Bond Trust (the fund) for the period of January 1, 2026 to June 30, 2026.
Shareholder Report Annual or Semi-Annual semi-annual shareholder report
Additional Information [Text Block] You can find additional information about the fund at dfinview.com/johnhancock?site=funds. You can also request this information by contacting us at 800-344-1029 for John Hancock Variable Annuities and 800-732-5543 for John Hancock Variable Life Insurance.
Additional Information Phone Number 800-344-1029800-732-5543
Additional Information Website dfinview.com/johnhancock?site=funds
Expenses [Text Block]
What were the fund costs during the last six months ?
(Based on a hypothetical $10,000 investment)
Fund (Class) Costs of a $10,000 investment Costs paid as a percentage
of a $10,000 investment
Ultra Short Term Bond Trust
(Series II/JAGEX)
$40 0.81%
Expenses Paid, Amount $ 40
Expense Ratio, Percent 0.81%
Net Assets $ 205,432,435
Holdings Count | Holding 211
Investment Company Portfolio Turnover 41.00%
Additional Fund Statistics [Text Block]
Fund Statistics
Fund net assets $205,432,435
Total number of portfolio holdings 211
Portfolio turnover rate 41%
Holdings [Text Block]
Graphical Representation of Holdings
The tables below show the investment makeup of the fund, representing a percentage of the total net assets of the fund.
Portfolio Composition
Corporate bonds 55.3%
Asset-backed securities 22.7%
U.S. Government Agency 0.4%
Collateralized mortgage obligations – U.S. Government Agency 0.2%
Short-term investments and other 21.4%
Quality Composition
Graphical Representation - Allocation 1 Chart
Ratings are from Moody’s Investors Service, Inc. If not available, we have used S&P Global Ratings. In the absence of ratings from these agencies, we have used Fitch Ratings, Inc. “Not rated” securities are those with no ratings available from these agencies. All ratings are as of 6-30-26 and do not reflect subsequent downgrades or upgrades, if any.
Holdings may not have been held by the fund for the entire period and are subject to change without notice. Portfolio composition is subject to review in accordance with the fund’s investment strategy and may vary in the future. Current and future portfolio holdings are subject to risk and may change at any time.
Credit Quality Explanation [Text Block]
Ratings are from Moody’s Investors Service, Inc. If not available, we have used S&P Global Ratings. In the absence of ratings from these agencies, we have used Fitch Ratings, Inc. “Not rated” securities are those with no ratings available from these agencies. All ratings are as of 6-30-26 and do not reflect subsequent downgrades or upgrades, if any.
Credit Ratings Selection [Text Block] Ratings are from Moody’s Investors Service, Inc. If not available, we have used S&P Global Ratings. In the absence of ratings from these agencies, we have used Fitch Ratings, Inc.
C000090649 [Member]  
Shareholder Report [Line Items]  
Fund Name Ultra Short Term Bond Trust
Class Name Series I
Trading Symbol JAGJX
Annual or Semi-Annual Statement [Text Block] This semiannual shareholder report contains important information about the Ultra Short Term Bond Trust (the fund) for the period of January 1, 2026 to June 30, 2026.
Shareholder Report Annual or Semi-Annual semi-annual shareholder report
Additional Information [Text Block] You can find additional information about the fund at dfinview.com/johnhancock?site=funds. You can also request this information by contacting us at 800-344-1029 for John Hancock Variable Annuities and 800-732-5543 for John Hancock Variable Life Insurance.
Additional Information Phone Number 800-344-1029800-732-5543
Additional Information Website dfinview.com/johnhancock?site=funds
Expenses [Text Block]
What were the fund costs during the last six months ?
(Based on a hypothetical $10,000 investment)
Fund (Class) Costs of a $10,000 investment Costs paid as a percentage
of a $10,000 investment
Ultra Short Term Bond Trust
(Series I/JAGJX)
$30 0.61%
Expenses Paid, Amount $ 30
Expense Ratio, Percent 0.61%
Net Assets $ 205,432,435
Holdings Count | Holding 211
Investment Company Portfolio Turnover 41.00%
Additional Fund Statistics [Text Block]
Fund Statistics
Fund net assets $205,432,435
Total number of portfolio holdings 211
Portfolio turnover rate 41%
Holdings [Text Block]
Graphical Representation of Holdings
The tables below show the investment makeup of the fund, representing a percentage of the total net assets of the fund.
Portfolio Composition
Corporate bonds 55.3%
Asset-backed securities 22.7%
U.S. Government Agency 0.4%
Collateralized mortgage obligations – U.S. Government Agency 0.2%
Short-term investments and other 21.4%
Quality Composition
Graphical Representation - Allocation 1 Chart
Ratings are from Moody’s Investors Service, Inc. If not available, we have used S&P Global Ratings. In the absence of ratings from these agencies, we have used Fitch Ratings, Inc. “Not rated” securities are those with no ratings available from these agencies. All ratings are as of 6-30-26 and do not reflect subsequent downgrades or upgrades, if any.
Holdings may not have been held by the fund for the entire period and are subject to change without notice. Portfolio composition is subject to review in accordance with the fund’s investment strategy and may vary in the future. Current and future portfolio holdings are subject to risk and may change at any time.
Credit Quality Explanation [Text Block]
Ratings are from Moody’s Investors Service, Inc. If not available, we have used S&P Global Ratings. In the absence of ratings from these agencies, we have used Fitch Ratings, Inc. “Not rated” securities are those with no ratings available from these agencies. All ratings are as of 6-30-26 and do not reflect subsequent downgrades or upgrades, if any.
Credit Ratings Selection [Text Block] Ratings are from Moody’s Investors Service, Inc. If not available, we have used S&P Global Ratings. In the absence of ratings from these agencies, we have used Fitch Ratings, Inc.