v3.25.4
Expense Example - American Century International Bond Fund
Mar. 01, 2026
USD ($)
EMERGING MARKETS DEBT FUND | EMERGING MARKETS DEBT FUND, INVESTOR CLASS  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year $ 93
Expense Example, with Redemption, 3 Years 308
Expense Example, with Redemption, 5 Years 540
Expense Example, with Redemption, 10 Years 1,206
EMERGING MARKETS DEBT FUND | EMERGING MARKETS DEBT FUND, I CLASS  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 83
Expense Example, with Redemption, 3 Years 276
Expense Example, with Redemption, 5 Years 486
Expense Example, with Redemption, 10 Years 1,089
EMERGING MARKETS DEBT FUND | EMERGING MARKETS DEBT FUND, Y CLASS  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 73
Expense Example, with Redemption, 3 Years 245
Expense Example, with Redemption, 5 Years 431
Expense Example, with Redemption, 10 Years 971
EMERGING MARKETS DEBT FUND | EMERGING MARKETS DEBT FUND, A CLASS  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 563
Expense Example, with Redemption, 3 Years 819
Expense Example, with Redemption, 5 Years 1,094
Expense Example, with Redemption, 10 Years 1,875
EMERGING MARKETS DEBT FUND | EMERGING MARKETS DEBT FUND, C CLASS  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 194
Expense Example, with Redemption, 3 Years 618
Expense Example, with Redemption, 5 Years 1,066
Expense Example, with Redemption, 10 Years 2,114
EMERGING MARKETS DEBT FUND | EMERGING MARKETS DEBT FUND, R CLASS  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 144
Expense Example, with Redemption, 3 Years 464
Expense Example, with Redemption, 5 Years 806
Expense Example, with Redemption, 10 Years 1,771
EMERGING MARKETS DEBT FUND | EMERGING MARKETS DEBT FUND, R5 CLASS  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 73
Expense Example, with Redemption, 3 Years 245
Expense Example, with Redemption, 5 Years 431
Expense Example, with Redemption, 10 Years 971
EMERGING MARKETS DEBT FUND | EMERGING MARKETS DEBT FUND, R6 CLASS  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 68
Expense Example, with Redemption, 3 Years 229
Expense Example, with Redemption, 5 Years 404
Expense Example, with Redemption, 10 Years 911
EMERGING MARKETS DEBT FUND | EMERGING MARKETS DEBT FUND, G CLASS  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 3
Expense Example, with Redemption, 3 Years 10
Expense Example, with Redemption, 5 Years 17
Expense Example, with Redemption, 10 Years 39
GLOBAL BOND FUND | GLOBAL BOND FUND, INVESTOR CLASS  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 87
Expense Example, with Redemption, 3 Years 272
Expense Example, with Redemption, 5 Years 472
Expense Example, with Redemption, 10 Years 1,049
GLOBAL BOND FUND | GLOBAL BOND FUND, I CLASS  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 77
Expense Example, with Redemption, 3 Years 240
Expense Example, with Redemption, 5 Years 417
Expense Example, with Redemption, 10 Years 931
GLOBAL BOND FUND | GLOBAL BOND FUND, Y CLASS  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 67
Expense Example, with Redemption, 3 Years 208
Expense Example, with Redemption, 5 Years 363
Expense Example, with Redemption, 10 Years 811
GLOBAL BOND FUND | GLOBAL BOND FUND, A CLASS  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 557
Expense Example, with Redemption, 3 Years 785
Expense Example, with Redemption, 5 Years 1,030
Expense Example, with Redemption, 10 Years 1,730
GLOBAL BOND FUND | GLOBAL BOND FUND, C CLASS  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 188
Expense Example, with Redemption, 3 Years 583
Expense Example, with Redemption, 5 Years 1,001
Expense Example, with Redemption, 10 Years 1,971
GLOBAL BOND FUND | GLOBAL BOND FUND, R CLASS  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 138
Expense Example, with Redemption, 3 Years 428
Expense Example, with Redemption, 5 Years 740
Expense Example, with Redemption, 10 Years 1,623
GLOBAL BOND FUND | GLOBAL BOND FUND, R5 CLASS  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 67
Expense Example, with Redemption, 3 Years 208
Expense Example, with Redemption, 5 Years 363
Expense Example, with Redemption, 10 Years 811
GLOBAL BOND FUND | GLOBAL BOND FUND, R6 CLASS  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 61
Expense Example, with Redemption, 3 Years 193
Expense Example, with Redemption, 5 Years 335
Expense Example, with Redemption, 10 Years 751
GLOBAL BOND FUND | GLOBAL BOND FUND, G CLASS  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 2
Expense Example, with Redemption, 3 Years 6
Expense Example, with Redemption, 5 Years 11
Expense Example, with Redemption, 10 Years $ 26