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 BlackRock Strategic Global Bond Fund, Inc.
Entity Central Index Key 0000835620
Entity Investment Company Type N-1A
Document Period End Date Jun. 30, 2026
C000162768 [Member]  
Shareholder Report [Line Items]  
Fund Name BlackRock Strategic Global Bond Fund, Inc.
Class Name Class K Shares
Trading Symbol MKWIX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about BlackRock Strategic Global Bond Fund, Inc. (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 blackrock.com/fundreports. You can also request this information by contacting us at (800) 441‑7762.
Additional Information Phone Number (800) 441‑7762
Additional Information Website blackrock.com/fundreports
Expenses [Text Block]
What were the Fund costs for the last six months ?
(based on a hypothetical $10,000 investment)
Class name Costs of a $10,000
investment
Costs paid as a percentage of a
$10,000 investment
Class K Shares $24 0.48%(a)
(a)
Annualized.
Expenses Paid, Amount $ 24
Expense Ratio, Percent 0.48% [1]
Net Assets $ 929,595,959
Holdings Count | Holding 3,173
Investment Company Portfolio Turnover 176.00%
Additional Fund Statistics [Text Block]
Key Fund statistics
Net Assets $929,595,959
Number of Portfolio Holdings 3,173
Portfolio Turnover Rate 176%
Holdings [Text Block]
What did the Fund invest in?
(as of June 30, 2026)
Portfolio composition
Investment Type Percent of Total
Investments(a)
Foreign Agency Obligations 27.3 %
U.S. Government Sponsored Agency Securities 20.5 %
Corporate Bonds 15.3 %
Non-Agency Mortgage-Backed Securities 13.5 %
Asset-Backed Securities 9.0 %
Investment Companies 7.2 %
Floating Rate Loan Interests 2.4 %
Common Stocks 2.2 %
Capital Trusts 1.6 %
Preferred Stocks 0.7 %
Other* 0.3 %
Geographic allocation
Country/Geographic Region Percent of Total
Investments(a)
United States 54.9 %
Spain 5.8 %
China 4.2 %
United Kingdom 4.0 %
Italy 3.3 %
Cayman Islands 2.5 %
Mexico 2.1 %
France 2.0 %
Germany 1.5 %
South Africa 1.5 %
Other# 18.2 %
(a)
Excludes short-term securities, short investments and options, if any.
*
Ten largest investment types are presented. Additional investment types are found in Other.
#
Ten largest countries/geographic regions are presented. Additional countries/geographic regions are found in Other.
C000038980 [Member]  
Shareholder Report [Line Items]  
Fund Name BlackRock Strategic Global Bond Fund, Inc.
Class Name Investor C Shares
Trading Symbol MHWIX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about BlackRock Strategic Global Bond Fund, Inc. (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 blackrock.com/fundreports. You can also request this information by contacting us at (800) 441‑7762.
Additional Information Phone Number (800) 441‑7762
Additional Information Website blackrock.com/fundreports
Expenses [Text Block]
What were the Fund costs for the last six months ?
(based on a hypothetical $10,000 investment)
Class name Costs of a $10,000
investment
Costs paid as a percentage of a
$10,000 investment
Investor C Shares $76 1.53%(a)
(a)
Annualized.
Expenses Paid, Amount $ 76
Expense Ratio, Percent 1.53% [2]
Net Assets $ 929,595,959
Holdings Count | Holding 3,173
Investment Company Portfolio Turnover 176.00%
Additional Fund Statistics [Text Block]
Key Fund statistics
Net Assets $929,595,959
Number of Portfolio Holdings 3,173
Portfolio Turnover Rate 176%
Holdings [Text Block]
What did the Fund invest in?
(as of June 30, 2026)
Portfolio composition
Investment Type Percent of Total
Investments(a)
Foreign Agency Obligations 27.3 %
U.S. Government Sponsored Agency Securities 20.5 %
Corporate Bonds 15.3 %
Non-Agency Mortgage-Backed Securities 13.5 %
Asset-Backed Securities 9.0 %
Investment Companies 7.2 %
Floating Rate Loan Interests 2.4 %
Common Stocks 2.2 %
Capital Trusts 1.6 %
Preferred Stocks 0.7 %
Other* 0.3 %
Geographic allocation
Country/Geographic Region Percent of Total
Investments(a)
United States 54.9 %
Spain 5.8 %
China 4.2 %
United Kingdom 4.0 %
Italy 3.3 %
Cayman Islands 2.5 %
Mexico 2.1 %
France 2.0 %
Germany 1.5 %
South Africa 1.5 %
Other# 18.2 %
(a)
Excludes short-term securities, short investments and options, if any.
*
Ten largest investment types are presented. Additional investment types are found in Other.
#
Ten largest countries/geographic regions are presented. Additional countries/geographic regions are found in Other.
C000007879 [Member]  
Shareholder Report [Line Items]  
Fund Name BlackRock Strategic Global Bond Fund, Inc.
Class Name Investor A Shares
Trading Symbol MDWIX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about BlackRock Strategic Global Bond Fund, Inc. (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 blackrock.com/fundreports. You can also request this information by contacting us at (800) 441‑7762.
Additional Information Phone Number (800) 441‑7762
Additional Information Website blackrock.com/fundreports
Expenses [Text Block]
What were the Fund costs for the last six months ?
(based on a hypothetical $10,000 investment)
Class name Costs of a $10,000
investment
Costs paid as a percentage of a
$10,000 investment
Investor A Shares $39 0.78%(a)
(a)
Annualized.
Expenses Paid, Amount $ 39
Expense Ratio, Percent 0.78% [3]
Net Assets $ 929,595,959
Holdings Count | Holding 3,173
Investment Company Portfolio Turnover 176.00%
Additional Fund Statistics [Text Block]
Key Fund statistics
Net Assets $929,595,959
Number of Portfolio Holdings 3,173
Portfolio Turnover Rate 176%
Holdings [Text Block]
What did the Fund invest in?
(as of June 30, 2026)
Portfolio composition
Investment Type Percent of Total
Investments(a)
Foreign Agency Obligations 27.3 %
U.S. Government Sponsored Agency Securities 20.5 %
Corporate Bonds 15.3 %
Non-Agency Mortgage-Backed Securities 13.5 %
Asset-Backed Securities 9.0 %
Investment Companies 7.2 %
Floating Rate Loan Interests 2.4 %
Common Stocks 2.2 %
Capital Trusts 1.6 %
Preferred Stocks 0.7 %
Other* 0.3 %
Geographic allocation
Country/Geographic Region Percent of Total
Investments(a)
United States 54.9 %
Spain 5.8 %
China 4.2 %
United Kingdom 4.0 %
Italy 3.3 %
Cayman Islands 2.5 %
Mexico 2.1 %
France 2.0 %
Germany 1.5 %
South Africa 1.5 %
Other# 18.2 %
(a)
Excludes short-term securities, short investments and options, if any.
*
Ten largest investment types are presented. Additional investment types are found in Other.
#
Ten largest countries/geographic regions are presented. Additional countries/geographic regions are found in Other.
C000007882 [Member]  
Shareholder Report [Line Items]  
Fund Name BlackRock Strategic Global Bond Fund, Inc.
Class Name Institutional Shares
Trading Symbol MAWIX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about BlackRock Strategic Global Bond Fund, Inc. (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 blackrock.com/fundreports. You can also request this information by contacting us at (800) 441‑7762.
Additional Information Phone Number (800) 441‑7762
Additional Information Website blackrock.com/fundreports
Expenses [Text Block]
What were the Fund costs for the last six months ?
(based on a hypothetical $10,000 investment)
Class name Costs of a $10,000
investment
Costs paid as a percentage of a
$10,000 investment
Institutional Shares $26 0.53%(a)
(a)
Annualized.
Expenses Paid, Amount $ 26
Expense Ratio, Percent 0.53% [4]
Net Assets $ 929,595,959
Holdings Count | Holding 3,173
Investment Company Portfolio Turnover 176.00%
Additional Fund Statistics [Text Block]
Key Fund statistics
Net Assets $929,595,959
Number of Portfolio Holdings 3,173
Portfolio Turnover Rate 176%
Holdings [Text Block]
What did the Fund invest in?
(as of June 30, 2026)
Portfolio composition
Investment Type Percent of Total
Investments(a)
Foreign Agency Obligations 27.3 %
U.S. Government Sponsored Agency Securities 20.5 %
Corporate Bonds 15.3 %
Non-Agency Mortgage-Backed Securities 13.5 %
Asset-Backed Securities 9.0 %
Investment Companies 7.2 %
Floating Rate Loan Interests 2.4 %
Common Stocks 2.2 %
Capital Trusts 1.6 %
Preferred Stocks 0.7 %
Other* 0.3 %
Geographic allocation
Country/Geographic Region Percent of Total
Investments(a)
United States 54.9 %
Spain 5.8 %
China 4.2 %
United Kingdom 4.0 %
Italy 3.3 %
Cayman Islands 2.5 %
Mexico 2.1 %
France 2.0 %
Germany 1.5 %
South Africa 1.5 %
Other# 18.2 %
(a)
Excludes short-term securities, short investments and options, if any.
*
Ten largest investment types are presented. Additional investment types are found in Other.
#
Ten largest countries/geographic regions are presented. Additional countries/geographic regions are found in Other.
[1]
Annualized.
[2]
Annualized.
[3]
Annualized.
[4]
Annualized.