v3.26.1
Shareholder Report
6 Months Ended
Mar. 31, 2026
USD ($)
Holding
Shareholder Report [Line Items]  
Document Type N-CSRS
Amendment Flag false
Registrant Name AB GLOBAL BOND FUND, INC.
Entity Central Index Key 0000883676
Entity Investment Company Type N-1A
Document Period End Date Mar. 31, 2026
C000028113  
Shareholder Report [Line Items]  
Fund Name AB Global Bond Fund
Class Name Class A
Trading Symbol ANAGX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about the AB Global Bond Fund (the “Fund”) for the period of October 1, 2025 to March 31, 2026.
Shareholder Report Annual or Semi-Annual Semi-Annual Shareholder Report
Additional Information [Text Block] You can find additional information about the Fund at https://www.abfunds.com/link/AB/ANAGX-S. You can also request this information by contacting us at (800) 227 4618.
Additional Information Phone Number (800) 227 4618
Additional Information Website https://www.abfunds.com/link/AB/ANAGX-S
Expenses [Text Block]

What were the Fund costs for the last six months?

(Based on a hypothetical $10,000 investment)

Table Summary
Class Name
Cost of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
Class A
$38
0.77%Footnote Reference*
Footnote Description
Footnote*
Annualized
Expenses Paid, Amount $ 38
Expense Ratio, Percent 0.77% [1]
AssetsNet $ 6,700,116,964
Holdings Count | Holding 1,719
Advisory Fees Paid, Amount $ 14,961,332
InvestmentCompanyPortfolioTurnover 134.00%
Additional Fund Statistics [Text Block]

Key Fund Statistics

Table Summary
Net Assets
$6,700,116,964
# of Portfolio Holdings
1,719
Portfolio Turnover Rate
134%
Total Advisory Fees Paid (Net)
$14,961,332
Holdings [Text Block]

Security Type Breakdown (% of Net Assets)

Table Summary
Governments - Treasuries
44.7%
Corporates - Investment Grade
25.5%
Mortgage Pass-Throughs
13.8%
Collateralized Mortgage Obligations
4.0%
Collateralized Loan Obligations
3.5%
Commercial Mortgage-Backed Securities
3.2%
Asset-Backed Securities
2.7%
Covered Bonds
2.4%
Corporates - Non-Investment Grade
1.9%
Emerging Markets - Treasuries
1.5%
Governments - Sovereign Bonds
1.4%
Governments - Sovereign Agencies
1.1%
Others
4.0%
Short-Term Investments
1.0%
Other assets less liabilities
-10.7%
Total
100.0%

Country Breakdown (% of Net Assets)

Table Summary
United States
49.0%
United Kingdom
12.5%
Canada
8.8%
Japan
7.5%
France
5.3%
Italy
3.5%
Germany
3.3%
China
2.3%
Australia
1.7%
South Africa
1.3%
Brazil
1.2%
Indonesia
1.1%
Mexico
1.0%
Others
11.2%
Short-Term Investments
1.0%
Other assets less liabilities
-10.7%
Total
100.0%
C000057412  
Shareholder Report [Line Items]  
Fund Name AB Global Bond Fund
Class Name Advisor Class
Trading Symbol ANAYX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about the AB Global Bond Fund (the “Fund”) for the period of October 1, 2025 to March 31, 2026.
Shareholder Report Annual or Semi-Annual Semi-Annual Shareholder Report
Additional Information [Text Block] You can find additional information about the Fund at https://www.abfunds.com/link/AB/ANAYX-S. You can also request this information by contacting us at (800) 227 4618.
Additional Information Phone Number (800) 227 4618
Additional Information Website https://www.abfunds.com/link/AB/ANAYX-S
Expenses [Text Block]

What were the Fund costs for the last six months?

(Based on a hypothetical $10,000 investment)

Table Summary
Class Name
Cost of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
Advisor Class
$26
0.52%Footnote Reference*
Footnote Description
Footnote*
Annualized
Expenses Paid, Amount $ 26
Expense Ratio, Percent 0.52% [2]
AssetsNet $ 6,700,116,964
Holdings Count | Holding 1,719
Advisory Fees Paid, Amount $ 14,961,332
InvestmentCompanyPortfolioTurnover 134.00%
Additional Fund Statistics [Text Block]

Key Fund Statistics

Table Summary
Net Assets
$6,700,116,964
# of Portfolio Holdings
1,719
Portfolio Turnover Rate
134%
Total Advisory Fees Paid (Net)
$14,961,332
Holdings [Text Block]

Security Type Breakdown (% of Net Assets)

Table Summary
Governments - Treasuries
44.7%
Corporates - Investment Grade
25.5%
Mortgage Pass-Throughs
13.8%
Collateralized Mortgage Obligations
4.0%
Collateralized Loan Obligations
3.5%
Commercial Mortgage-Backed Securities
3.2%
Asset-Backed Securities
2.7%
Covered Bonds
2.4%
Corporates - Non-Investment Grade
1.9%
Emerging Markets - Treasuries
1.5%
Governments - Sovereign Bonds
1.4%
Governments - Sovereign Agencies
1.1%
Others
4.0%
Short-Term Investments
1.0%
Other assets less liabilities
-10.7%
Total
100.0%

Country Breakdown (% of Net Assets)

Table Summary
United States
49.0%
United Kingdom
12.5%
Canada
8.8%
Japan
7.5%
France
5.3%
Italy
3.5%
Germany
3.3%
China
2.3%
Australia
1.7%
South Africa
1.3%
Brazil
1.2%
Indonesia
1.1%
Mexico
1.0%
Others
11.2%
Short-Term Investments
1.0%
Other assets less liabilities
-10.7%
Total
100.0%
C000028115  
Shareholder Report [Line Items]  
Fund Name AB Global Bond Fund
Class Name Class C
Trading Symbol ANACX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about the AB Global Bond Fund (the “Fund”) for the period of October 1, 2025 to March 31, 2026.
Shareholder Report Annual or Semi-Annual Semi-Annual Shareholder Report
Additional Information [Text Block] You can find additional information about the Fund at https://www.abfunds.com/link/AB/ANACX-S. You can also request this information by contacting us at (800) 227 4618.
Additional Information Phone Number (800) 227 4618
Additional Information Website https://www.abfunds.com/link/AB/ANACX-S
Expenses [Text Block]

What were the Fund costs for the last six months?

(Based on a hypothetical $10,000 investment)

Table Summary
Class Name
Cost of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
Class C
$76
1.52%Footnote Reference*
Footnote Description
Footnote*
Annualized
Expenses Paid, Amount $ 76
Expense Ratio, Percent 1.52% [3]
AssetsNet $ 6,700,116,964
Holdings Count | Holding 1,719
Advisory Fees Paid, Amount $ 14,961,332
InvestmentCompanyPortfolioTurnover 134.00%
Additional Fund Statistics [Text Block]

Key Fund Statistics

Table Summary
Net Assets
$6,700,116,964
# of Portfolio Holdings
1,719
Portfolio Turnover Rate
134%
Total Advisory Fees Paid (Net)
$14,961,332
Holdings [Text Block]

Security Type Breakdown (% of Net Assets)

Table Summary
Governments - Treasuries
44.7%
Corporates - Investment Grade
25.5%
Mortgage Pass-Throughs
13.8%
Collateralized Mortgage Obligations
4.0%
Collateralized Loan Obligations
3.5%
Commercial Mortgage-Backed Securities
3.2%
Asset-Backed Securities
2.7%
Covered Bonds
2.4%
Corporates - Non-Investment Grade
1.9%
Emerging Markets - Treasuries
1.5%
Governments - Sovereign Bonds
1.4%
Governments - Sovereign Agencies
1.1%
Others
4.0%
Short-Term Investments
1.0%
Other assets less liabilities
-10.7%
Total
100.0%

Country Breakdown (% of Net Assets)

Table Summary
United States
49.0%
United Kingdom
12.5%
Canada
8.8%
Japan
7.5%
France
5.3%
Italy
3.5%
Germany
3.3%
China
2.3%
Australia
1.7%
South Africa
1.3%
Brazil
1.2%
Indonesia
1.1%
Mexico
1.0%
Others
11.2%
Short-Term Investments
1.0%
Other assets less liabilities
-10.7%
Total
100.0%
C000057411  
Shareholder Report [Line Items]  
Fund Name AB Global Bond Fund
Class Name Class I
Trading Symbol ANAIX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about the AB Global Bond Fund (the “Fund”) for the period of October 1, 2025 to March 31, 2026.
Shareholder Report Annual or Semi-Annual Semi-Annual Shareholder Report
Additional Information [Text Block] You can find additional information about the Fund at https://www.abfunds.com/link/AB/ANAIX-S. You can also request this information by contacting us at (800) 227 4618.
Additional Information Phone Number (800) 227 4618
Additional Information Website https://www.abfunds.com/link/AB/ANAIX-S
Expenses [Text Block]

What were the Fund costs for the last six months?

(Based on a hypothetical $10,000 investment)

Table Summary
Class Name
Cost of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
Class I
$27
0.54%Footnote Reference*
Footnote Description
Footnote*
Annualized
Expenses Paid, Amount $ 27
Expense Ratio, Percent 0.54% [4]
AssetsNet $ 6,700,116,964
Holdings Count | Holding 1,719
Advisory Fees Paid, Amount $ 14,961,332
InvestmentCompanyPortfolioTurnover 134.00%
Additional Fund Statistics [Text Block]

Key Fund Statistics

Table Summary
Net Assets
$6,700,116,964
# of Portfolio Holdings
1,719
Portfolio Turnover Rate
134%
Total Advisory Fees Paid (Net)
$14,961,332
Holdings [Text Block]

Security Type Breakdown (% of Net Assets)

Table Summary
Governments - Treasuries
44.7%
Corporates - Investment Grade
25.5%
Mortgage Pass-Throughs
13.8%
Collateralized Mortgage Obligations
4.0%
Collateralized Loan Obligations
3.5%
Commercial Mortgage-Backed Securities
3.2%
Asset-Backed Securities
2.7%
Covered Bonds
2.4%
Corporates - Non-Investment Grade
1.9%
Emerging Markets - Treasuries
1.5%
Governments - Sovereign Bonds
1.4%
Governments - Sovereign Agencies
1.1%
Others
4.0%
Short-Term Investments
1.0%
Other assets less liabilities
-10.7%
Total
100.0%

Country Breakdown (% of Net Assets)

Table Summary
United States
49.0%
United Kingdom
12.5%
Canada
8.8%
Japan
7.5%
France
5.3%
Italy
3.5%
Germany
3.3%
China
2.3%
Australia
1.7%
South Africa
1.3%
Brazil
1.2%
Indonesia
1.1%
Mexico
1.0%
Others
11.2%
Short-Term Investments
1.0%
Other assets less liabilities
-10.7%
Total
100.0%
C000135460  
Shareholder Report [Line Items]  
Fund Name AB Global Bond Fund
Class Name Class Z
Trading Symbol ANAZX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about the AB Global Bond Fund (the “Fund”) for the period of October 1, 2025 to March 31, 2026.
Shareholder Report Annual or Semi-Annual Semi-Annual Shareholder Report
Additional Information [Text Block] You can find additional information about the Fund at https://www.abfunds.com/link/AB/ANAZX-S. You can also request this information by contacting us at (800) 227 4618.
Additional Information Phone Number (800) 227 4618
Additional Information Website https://www.abfunds.com/link/AB/ANAZX-S
Expenses [Text Block]

What were the Fund costs for the last six months?

(Based on a hypothetical $10,000 investment)

Table Summary
Class Name
Cost of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
Class Z
$25
0.50%Footnote Reference*
Footnote Description
Footnote*
Annualized
Expenses Paid, Amount $ 25
Expense Ratio, Percent 0.50% [5]
AssetsNet $ 6,700,116,964
Holdings Count | Holding 1,719
Advisory Fees Paid, Amount $ 14,961,332
InvestmentCompanyPortfolioTurnover 134.00%
Additional Fund Statistics [Text Block]

Key Fund Statistics

Table Summary
Net Assets
$6,700,116,964
# of Portfolio Holdings
1,719
Portfolio Turnover Rate
134%
Total Advisory Fees Paid (Net)
$14,961,332
Holdings [Text Block]

Security Type Breakdown (% of Net Assets)

Table Summary
Governments - Treasuries
44.7%
Corporates - Investment Grade
25.5%
Mortgage Pass-Throughs
13.8%
Collateralized Mortgage Obligations
4.0%
Collateralized Loan Obligations
3.5%
Commercial Mortgage-Backed Securities
3.2%
Asset-Backed Securities
2.7%
Covered Bonds
2.4%
Corporates - Non-Investment Grade
1.9%
Emerging Markets - Treasuries
1.5%
Governments - Sovereign Bonds
1.4%
Governments - Sovereign Agencies
1.1%
Others
4.0%
Short-Term Investments
1.0%
Other assets less liabilities
-10.7%
Total
100.0%

Country Breakdown (% of Net Assets)

Table Summary
United States
49.0%
United Kingdom
12.5%
Canada
8.8%
Japan
7.5%
France
5.3%
Italy
3.5%
Germany
3.3%
China
2.3%
Australia
1.7%
South Africa
1.3%
Brazil
1.2%
Indonesia
1.1%
Mexico
1.0%
Others
11.2%
Short-Term Investments
1.0%
Other assets less liabilities
-10.7%
Total
100.0%
[1] Annualized
[2] Annualized
[3] Annualized
[4] Annualized
[5] Annualized