Annual Total Returns - American Century Government Income Trust |
12 Months Ended | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|
Dec. 31, 2025 |
Dec. 31, 2024 |
Dec. 31, 2023 |
Dec. 31, 2022 |
Dec. 31, 2021 |
Dec. 31, 2020 |
Dec. 31, 2019 |
Dec. 31, 2018 |
Dec. 31, 2017 |
Dec. 31, 2016 |
|
| CAPITAL PRESERVATION FUND | CAPITAL PRESERVATION FUND INVESTOR CLASS | ||||||||||
| Prospectus [Line Items] | ||||||||||
| Annual Return [Percent] | 3.87% | 4.82% | 4.64% | 1.19% | 0.01% | 0.25% | 1.75% | 1.38% | 0.41% | 0.01% |
| GINNIE MAE FUND | GINNIE MAE FUND INVESTOR CLASS | ||||||||||
| Prospectus [Line Items] | ||||||||||
| Annual Return [Percent] | 7.41% | 0.51% | 4.71% | (11.51%) | (1.65%) | 3.71% | 6.16% | 0.42% | 1.21% | 1.05% |
| GOVERNMENT BOND FUND | GOVERNMENT BOND FUND INVESTOR CLASS | ||||||||||
| Prospectus [Line Items] | ||||||||||
| Annual Return [Percent] | 7.24% | 0.31% | 3.50% | (12.55%) | (1.14%) | 6.69% | 6.16% | 0.56% | 2.14% | 0.85% |
| SHORT-TERM GOVERNMENT FUND | SHORT-TERM GOVERNMENT FUND INVESTOR CLASS | ||||||||||
| Prospectus [Line Items] | ||||||||||
| Annual Return [Percent] | 4.91% | 3.56% | 3.68% | (3.96%) | (0.09%) | 3.35% | 2.91% | 1.11% | 0.21% | 0.41% |
| INFLATION-ADJUSTED BOND FUND | INFLATION-ADJUSTED BOND FUND INVESTOR CLASS | ||||||||||
| Prospectus [Line Items] | ||||||||||
| Annual Return [Percent] | 6.67% | 1.68% | 3.16% | (12.38%) | 6.37% | 10.28% | 7.85% | (2.51%) | 3.08% | 4.72% |