v3.26.1
Annual Fund Operating Expenses - American Century Government Income Trust
Aug. 01, 2026
CAPITAL PRESERVATION FUND | CAPITAL PRESERVATION FUND INVESTOR CLASS  
Prospectus [Line Items]  
Management Fees (as a percentage of Assets) 0.47%
Distribution and Service (12b-1) Fees 0.00%
Other Expenses (as a percentage of Assets): 0.00%
Expenses (as a percentage of Assets) 0.47%
GINNIE MAE FUND | GINNIE MAE FUND INVESTOR CLASS  
Prospectus [Line Items]  
Management Fees (as a percentage of Assets) 0.54%
Distribution and Service (12b-1) Fees 0.00%
Other Expenses (as a percentage of Assets): 0.01%
Expenses (as a percentage of Assets) 0.55%
GINNIE MAE FUND | GINNIE MAE FUND I CLASS  
Prospectus [Line Items]  
Management Fees (as a percentage of Assets) 0.44%
Distribution and Service (12b-1) Fees 0.00%
Other Expenses (as a percentage of Assets): 0.01%
Expenses (as a percentage of Assets) 0.45%
GINNIE MAE FUND | GINNIE MAE FUND A CLASS  
Prospectus [Line Items]  
Management Fees (as a percentage of Assets) 0.54%
Distribution and Service (12b-1) Fees 0.25%
Other Expenses (as a percentage of Assets): 0.01%
Expenses (as a percentage of Assets) 0.80%
GINNIE MAE FUND | GINNIE MAE FUND C CLASS  
Prospectus [Line Items]  
Management Fees (as a percentage of Assets) 0.54%
Distribution and Service (12b-1) Fees 1.00%
Other Expenses (as a percentage of Assets): 0.01%
Expenses (as a percentage of Assets) 1.55%
GINNIE MAE FUND | GINNIE MAE FUND R CLASS  
Prospectus [Line Items]  
Management Fees (as a percentage of Assets) 0.54%
Distribution and Service (12b-1) Fees 0.50%
Other Expenses (as a percentage of Assets): 0.01%
Expenses (as a percentage of Assets) 1.05%
GINNIE MAE FUND | GINNIE MAE FUND R5 CLASS  
Prospectus [Line Items]  
Management Fees (as a percentage of Assets) 0.34%
Distribution and Service (12b-1) Fees 0.00%
Other Expenses (as a percentage of Assets): 0.01%
Expenses (as a percentage of Assets) 0.35%
GOVERNMENT BOND FUND | GOVERNMENT BOND FUND INVESTOR CLASS  
Prospectus [Line Items]  
Management Fees (as a percentage of Assets) 0.46%
Distribution and Service (12b-1) Fees 0.00%
Other Expenses (as a percentage of Assets): 0.01%
Expenses (as a percentage of Assets) 0.47%
GOVERNMENT BOND FUND | GOVERNMENT BOND FUND I CLASS  
Prospectus [Line Items]  
Management Fees (as a percentage of Assets) 0.36%
Distribution and Service (12b-1) Fees 0.00%
Other Expenses (as a percentage of Assets): 0.01%
Expenses (as a percentage of Assets) 0.37%
GOVERNMENT BOND FUND | GOVERNMENT BOND FUND A CLASS  
Prospectus [Line Items]  
Management Fees (as a percentage of Assets) 0.46%
Distribution and Service (12b-1) Fees 0.25%
Other Expenses (as a percentage of Assets): 0.01%
Expenses (as a percentage of Assets) 0.72%
GOVERNMENT BOND FUND | GOVERNMENT BOND FUND C CLASS  
Prospectus [Line Items]  
Management Fees (as a percentage of Assets) 0.46%
Distribution and Service (12b-1) Fees 1.00%
Other Expenses (as a percentage of Assets): 0.01%
Expenses (as a percentage of Assets) 1.47%
GOVERNMENT BOND FUND | GOVERNMENT BOND FUND R CLASS  
Prospectus [Line Items]  
Management Fees (as a percentage of Assets) 0.46%
Distribution and Service (12b-1) Fees 0.50%
Other Expenses (as a percentage of Assets): 0.01%
Expenses (as a percentage of Assets) 0.97%
GOVERNMENT BOND FUND | GOVERNMENT BOND FUND R5 CLASS  
Prospectus [Line Items]  
Management Fees (as a percentage of Assets) 0.26%
Distribution and Service (12b-1) Fees 0.00%
Other Expenses (as a percentage of Assets): 0.01%
Expenses (as a percentage of Assets) 0.27%
SHORT-TERM GOVERNMENT FUND | SHORT-TERM GOVERNMENT FUND INVESTOR CLASS  
Prospectus [Line Items]  
Management Fees (as a percentage of Assets) 0.54%
Distribution and Service (12b-1) Fees 0.00%
Other Expenses (as a percentage of Assets): 0.01%
Expenses (as a percentage of Assets) 0.55%
SHORT-TERM GOVERNMENT FUND | SHORT-TERM GOVERNMENT FUND I CLASS  
Prospectus [Line Items]  
Management Fees (as a percentage of Assets) 0.44%
Distribution and Service (12b-1) Fees 0.00%
Other Expenses (as a percentage of Assets): 0.01%
Expenses (as a percentage of Assets) 0.45%
SHORT-TERM GOVERNMENT FUND | SHORT-TERM GOVERNMENT FUND A CLASS  
Prospectus [Line Items]  
Management Fees (as a percentage of Assets) 0.54%
Distribution and Service (12b-1) Fees 0.25%
Other Expenses (as a percentage of Assets): 0.01%
Expenses (as a percentage of Assets) 0.80%
SHORT-TERM GOVERNMENT FUND | SHORT-TERM GOVERNMENT FUND C CLASS  
Prospectus [Line Items]  
Management Fees (as a percentage of Assets) 0.54%
Distribution and Service (12b-1) Fees 1.00%
Other Expenses (as a percentage of Assets): 0.01%
Expenses (as a percentage of Assets) 1.55%
SHORT-TERM GOVERNMENT FUND | SHORT-TERM GOVERNMENT FUND R CLASS  
Prospectus [Line Items]  
Management Fees (as a percentage of Assets) 0.54%
Distribution and Service (12b-1) Fees 0.50%
Other Expenses (as a percentage of Assets): 0.01%
Expenses (as a percentage of Assets) 1.05%
SHORT-TERM GOVERNMENT FUND | SHORT-TERM GOVERNMENT FUND R5 CLASS  
Prospectus [Line Items]  
Management Fees (as a percentage of Assets) 0.34%
Distribution and Service (12b-1) Fees 0.00%
Other Expenses (as a percentage of Assets): 0.01%
Expenses (as a percentage of Assets) 0.35%
INFLATION-ADJUSTED BOND FUND | INFLATION-ADJUSTED BOND FUND INVESTOR CLASS  
Prospectus [Line Items]  
Management Fees (as a percentage of Assets) 0.46%
Distribution and Service (12b-1) Fees 0.00%
Component1 Other Expenses 0.04%
Component2 Other Expenses 0.01%
Other Expenses (as a percentage of Assets): 0.05%
Acquired Fund Fees and Expenses 0.01%
Expenses (as a percentage of Assets) 0.52%
Fee Waiver or Reimbursement 0.00%
Net Expenses (as a percentage of Assets) 0.52%
INFLATION-ADJUSTED BOND FUND | INFLATION-ADJUSTED BOND FUND I CLASS  
Prospectus [Line Items]  
Management Fees (as a percentage of Assets) 0.36%
Distribution and Service (12b-1) Fees 0.00%
Component1 Other Expenses 0.04%
Component2 Other Expenses 0.01%
Other Expenses (as a percentage of Assets): 0.05%
Acquired Fund Fees and Expenses 0.01%
Expenses (as a percentage of Assets) 0.42%
Fee Waiver or Reimbursement 0.00%
Net Expenses (as a percentage of Assets) 0.42%
INFLATION-ADJUSTED BOND FUND | INFLATION-ADJUSTED BOND FUND Y CLASS  
Prospectus [Line Items]  
Management Fees (as a percentage of Assets) 0.26%
Distribution and Service (12b-1) Fees 0.00%
Component1 Other Expenses 0.04%
Component2 Other Expenses 0.01%
Other Expenses (as a percentage of Assets): 0.05%
Acquired Fund Fees and Expenses 0.01%
Expenses (as a percentage of Assets) 0.32%
Fee Waiver or Reimbursement 0.00%
Net Expenses (as a percentage of Assets) 0.32%
INFLATION-ADJUSTED BOND FUND | INFLATION-ADJUSTED BOND FUND A CLASS  
Prospectus [Line Items]  
Management Fees (as a percentage of Assets) 0.46%
Distribution and Service (12b-1) Fees 0.25%
Component1 Other Expenses 0.04%
Component2 Other Expenses 0.01%
Other Expenses (as a percentage of Assets): 0.05%
Acquired Fund Fees and Expenses 0.01%
Expenses (as a percentage of Assets) 0.77%
Fee Waiver or Reimbursement 0.00%
Net Expenses (as a percentage of Assets) 0.77%
INFLATION-ADJUSTED BOND FUND | INFLATION-ADJUSTED BOND FUND C CLASS  
Prospectus [Line Items]  
Management Fees (as a percentage of Assets) 0.46%
Distribution and Service (12b-1) Fees 1.00%
Component1 Other Expenses 0.04%
Component2 Other Expenses 0.01%
Other Expenses (as a percentage of Assets): 0.05%
Acquired Fund Fees and Expenses 0.01%
Expenses (as a percentage of Assets) 1.52%
Fee Waiver or Reimbursement 0.00%
Net Expenses (as a percentage of Assets) 1.52%
INFLATION-ADJUSTED BOND FUND | INFLATION-ADJUSTED BOND FUND R CLASS  
Prospectus [Line Items]  
Management Fees (as a percentage of Assets) 0.46%
Distribution and Service (12b-1) Fees 0.50%
Component1 Other Expenses 0.04%
Component2 Other Expenses 0.01%
Other Expenses (as a percentage of Assets): 0.05%
Acquired Fund Fees and Expenses 0.01%
Expenses (as a percentage of Assets) 1.02%
Fee Waiver or Reimbursement 0.00%
Net Expenses (as a percentage of Assets) 1.02%
INFLATION-ADJUSTED BOND FUND | INFLATION-ADJUSTED BOND FUND R5 CLASS  
Prospectus [Line Items]  
Management Fees (as a percentage of Assets) 0.26%
Distribution and Service (12b-1) Fees 0.00%
Component1 Other Expenses 0.04%
Component2 Other Expenses 0.01%
Other Expenses (as a percentage of Assets): 0.05%
Acquired Fund Fees and Expenses 0.01%
Expenses (as a percentage of Assets) 0.32%
Fee Waiver or Reimbursement 0.00%
Net Expenses (as a percentage of Assets) 0.32%
INFLATION-ADJUSTED BOND FUND | INFLATION-ADJUSTED BOND FUND R6 CLASS  
Prospectus [Line Items]  
Management Fees (as a percentage of Assets) 0.21%
Distribution and Service (12b-1) Fees 0.00%
Component1 Other Expenses 0.04%
Component2 Other Expenses 0.01%
Other Expenses (as a percentage of Assets): 0.05%
Acquired Fund Fees and Expenses 0.01%
Expenses (as a percentage of Assets) 0.27%
Fee Waiver or Reimbursement 0.00%
Net Expenses (as a percentage of Assets) 0.27%
INFLATION-ADJUSTED BOND FUND | INFLATION-ADJUSTED BOND FUND G CLASS  
Prospectus [Line Items]  
Management Fees (as a percentage of Assets) 0.21%
Distribution and Service (12b-1) Fees 0.00%
Component1 Other Expenses 0.04%
Component2 Other Expenses 0.01%
Other Expenses (as a percentage of Assets): 0.05%
Acquired Fund Fees and Expenses 0.01%
Expenses (as a percentage of Assets) 0.27%
Fee Waiver or Reimbursement (0.21%) [1]
Net Expenses (as a percentage of Assets) 0.06%
[1] The advisor has agreed to waive the G Class’s management fee in its entirety. The advisor expects this waiver to remain in effect permanently and cannot terminate it without the approval of the Board of Trustees.