v3.25.4
Shareholder Fees - American Century International Bond Fund
Mar. 01, 2026
USD ($)
EMERGING MARKETS DEBT FUND | EMERGING MARKETS DEBT FUND, INVESTOR CLASS  
Prospectus [Line Items]  
Maximum Sales Charge Imposed on Purchases (as a percentage of Offering Price) 0.00%
Maximum Deferred Sales Charge (as a percentage of Offering Price) 0.00%
Maximum Account Fee $ 25
EMERGING MARKETS DEBT FUND | EMERGING MARKETS DEBT FUND, I CLASS  
Prospectus [Line Items]  
Maximum Sales Charge Imposed on Purchases (as a percentage of Offering Price) 0.00%
Maximum Deferred Sales Charge (as a percentage of Offering Price) 0.00%
Maximum Account Fee $ 0
EMERGING MARKETS DEBT FUND | EMERGING MARKETS DEBT FUND, Y CLASS  
Prospectus [Line Items]  
Maximum Sales Charge Imposed on Purchases (as a percentage of Offering Price) 0.00%
Maximum Deferred Sales Charge (as a percentage of Offering Price) 0.00%
Maximum Account Fee $ 0
EMERGING MARKETS DEBT FUND | EMERGING MARKETS DEBT FUND, A CLASS  
Prospectus [Line Items]  
Maximum Sales Charge Imposed on Purchases (as a percentage of Offering Price) 4.50%
Maximum Deferred Sales Charge (as a percentage of Offering Price) 0.00% [1]
Maximum Account Fee $ 0
EMERGING MARKETS DEBT FUND | EMERGING MARKETS DEBT FUND, C CLASS  
Prospectus [Line Items]  
Maximum Sales Charge Imposed on Purchases (as a percentage of Offering Price) 0.00%
Maximum Deferred Sales Charge (as a percentage of Offering Price) 1.00%
Maximum Account Fee $ 0
EMERGING MARKETS DEBT FUND | EMERGING MARKETS DEBT FUND, R CLASS  
Prospectus [Line Items]  
Maximum Sales Charge Imposed on Purchases (as a percentage of Offering Price) 0.00%
Maximum Deferred Sales Charge (as a percentage of Offering Price) 0.00%
Maximum Account Fee $ 0
EMERGING MARKETS DEBT FUND | EMERGING MARKETS DEBT FUND, R5 CLASS  
Prospectus [Line Items]  
Maximum Sales Charge Imposed on Purchases (as a percentage of Offering Price) 0.00%
Maximum Deferred Sales Charge (as a percentage of Offering Price) 0.00%
Maximum Account Fee $ 0
EMERGING MARKETS DEBT FUND | EMERGING MARKETS DEBT FUND, R6 CLASS  
Prospectus [Line Items]  
Maximum Sales Charge Imposed on Purchases (as a percentage of Offering Price) 0.00%
Maximum Deferred Sales Charge (as a percentage of Offering Price) 0.00%
Maximum Account Fee $ 0
EMERGING MARKETS DEBT FUND | EMERGING MARKETS DEBT FUND, G CLASS  
Prospectus [Line Items]  
Maximum Sales Charge Imposed on Purchases (as a percentage of Offering Price) 0.00%
Maximum Deferred Sales Charge (as a percentage of Offering Price) 0.00%
Maximum Account Fee $ 0
GLOBAL BOND FUND | GLOBAL BOND FUND, INVESTOR CLASS  
Prospectus [Line Items]  
Maximum Sales Charge Imposed on Purchases (as a percentage of Offering Price) 0.00%
Maximum Deferred Sales Charge (as a percentage of Offering Price) 0.00%
Maximum Account Fee $ 25
GLOBAL BOND FUND | GLOBAL BOND FUND, I CLASS  
Prospectus [Line Items]  
Maximum Sales Charge Imposed on Purchases (as a percentage of Offering Price) 0.00%
Maximum Deferred Sales Charge (as a percentage of Offering Price) 0.00%
Maximum Account Fee $ 0
GLOBAL BOND FUND | GLOBAL BOND FUND, Y CLASS  
Prospectus [Line Items]  
Maximum Sales Charge Imposed on Purchases (as a percentage of Offering Price) 0.00%
Maximum Deferred Sales Charge (as a percentage of Offering Price) 0.00%
Maximum Account Fee $ 0
GLOBAL BOND FUND | GLOBAL BOND FUND, A CLASS  
Prospectus [Line Items]  
Maximum Sales Charge Imposed on Purchases (as a percentage of Offering Price) 4.50%
Maximum Deferred Sales Charge (as a percentage of Offering Price) 0.00% [2]
Maximum Account Fee $ 0
GLOBAL BOND FUND | GLOBAL BOND FUND, C CLASS  
Prospectus [Line Items]  
Maximum Sales Charge Imposed on Purchases (as a percentage of Offering Price) 0.00%
Maximum Deferred Sales Charge (as a percentage of Offering Price) 1.00%
Maximum Account Fee $ 0
GLOBAL BOND FUND | GLOBAL BOND FUND, R CLASS  
Prospectus [Line Items]  
Maximum Sales Charge Imposed on Purchases (as a percentage of Offering Price) 0.00%
Maximum Deferred Sales Charge (as a percentage of Offering Price) 0.00%
Maximum Account Fee $ 0
GLOBAL BOND FUND | GLOBAL BOND FUND, R5 CLASS  
Prospectus [Line Items]  
Maximum Sales Charge Imposed on Purchases (as a percentage of Offering Price) 0.00%
Maximum Deferred Sales Charge (as a percentage of Offering Price) 0.00%
Maximum Account Fee $ 0
GLOBAL BOND FUND | GLOBAL BOND FUND, R6 CLASS  
Prospectus [Line Items]  
Maximum Sales Charge Imposed on Purchases (as a percentage of Offering Price) 0.00%
Maximum Deferred Sales Charge (as a percentage of Offering Price) 0.00%
Maximum Account Fee $ 0
GLOBAL BOND FUND | GLOBAL BOND FUND, G CLASS  
Prospectus [Line Items]  
Maximum Sales Charge Imposed on Purchases (as a percentage of Offering Price) 0.00%
Maximum Deferred Sales Charge (as a percentage of Offering Price) 0.00%
Maximum Account Fee $ 0
[1] Purchases of $1 million or more may be subject to a contingent deferred sales charge of 1.00% if the shares are redeemed within one year of the date of purchase.
[2] Purchases of $1 million or more may be subject to a contingent deferred sales charge of 1.00% if the shares are redeemed within one year of the date of purchase.