Shareholder Report, Line Graph (Details) - USD ($) |
7 Months Ended | 10 Months Ended | 12 Months Ended | 19 Months Ended | 22 Months Ended | 24 Months Ended | 31 Months Ended | 34 Months Ended | 36 Months Ended | 43 Months Ended | 46 Months Ended | 48 Months Ended | 55 Months Ended | 58 Months Ended | 60 Months Ended | 67 Months Ended | 70 Months Ended | 72 Months Ended | 79 Months Ended | 84 Months Ended | 91 Months Ended | 96 Months Ended | 103 Months Ended | 108 Months Ended | 115 Months Ended | 120 Months Ended | ||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Oct. 30, 2020 |
Jan. 27, 2017 |
Aug. 31, 2016 |
Aug. 31, 2017 |
Aug. 31, 2021 |
Aug. 31, 2026 |
Aug. 31, 2017 |
Aug. 31, 2018 |
Aug. 31, 2022 |
Aug. 31, 2018 |
Aug. 31, 2019 |
Aug. 31, 2023 |
Aug. 31, 2019 |
Aug. 31, 2020 |
Aug. 31, 2024 |
Aug. 31, 2020 |
Aug. 31, 2021 |
Aug. 31, 2025 |
Aug. 31, 2021 |
Aug. 31, 2022 |
Aug. 31, 2026 |
Aug. 31, 2022 |
Aug. 31, 2023 |
Aug. 31, 2023 |
Aug. 31, 2024 |
Aug. 31, 2024 |
Aug. 31, 2025 |
Aug. 31, 2025 |
Aug. 31, 2026 |
Aug. 31, 2026 |
|
| U.S. Government Securities Fund® - Class A | ||||||||||||||||||||||||||||||
| Account Value [Line Items] | ||||||||||||||||||||||||||||||
| Line Graph and Table Measure Name | U.S. Government Securities Fund — Class A (with sales charge) | |||||||||||||||||||||||||||||
| Accumulated Value | $ 9,625 | $ 9,708 | $ 9,499 | $ 10,200 | $ 11,078 | $ 11,037 | $ 10,157 | $ 9,738 | $ 10,343 | $ 10,709 | $ 10,757 | |||||||||||||||||||
| U.S. Government Securities Fund® - Class C | ||||||||||||||||||||||||||||||
| Account Value [Line Items] | ||||||||||||||||||||||||||||||
| Line Graph and Table Measure Name | U.S. Government Securities Fund — Class C (with sales charge) | |||||||||||||||||||||||||||||
| Accumulated Value | 10,000 | 10,012 | 9,720 | 10,354 | 11,178 | 11,054 | 10,098 | 9,611 | 10,136 | 10,495 | 10,542 | |||||||||||||||||||
| U.S. Government Securities Fund® - Class F-1 | ||||||||||||||||||||||||||||||
| Account Value [Line Items] | ||||||||||||||||||||||||||||||
| Line Graph and Table Measure Name | U.S. Government Securities Fund — Class F-1 | |||||||||||||||||||||||||||||
| Accumulated Value | 10,000 | 10,084 | 9,866 | 10,594 | 11,511 | 11,467 | 10,549 | 10,112 | 10,738 | 11,114 | 11,158 | |||||||||||||||||||
| U.S. Government Securities Fund® - Class F-2 | ||||||||||||||||||||||||||||||
| Account Value [Line Items] | ||||||||||||||||||||||||||||||
| Line Graph and Table Measure Name | U.S. Government Securities Fund — Class F-2 | |||||||||||||||||||||||||||||
| Accumulated Value | 10,000 | 10,111 | 9,919 | 10,680 | 11,636 | 11,626 | 10,727 | 10,314 | 10,998 | 11,410 | 11,494 | |||||||||||||||||||
| U.S. Government Securities Fund® - Class F-3 | ||||||||||||||||||||||||||||||
| Account Value [Line Items] | ||||||||||||||||||||||||||||||
| Line Graph and Table Measure Name | U.S. Government Securities Fund — Class F-3 | |||||||||||||||||||||||||||||
| Accumulated Value | $ 10,000 | $ 10,266 | $ 10,082 | $ 10,867 | $ 11,852 | $ 11,855 | $ 10,958 | $ 10,539 | $ 11,250 | $ 11,685 | $ 11,794 | |||||||||||||||||||
| U.S. Government Securities Fund® - Class 529-A | ||||||||||||||||||||||||||||||
| Account Value [Line Items] | ||||||||||||||||||||||||||||||
| Line Graph and Table Measure Name | U.S. Government Securities Fund — Class 529-A (with sales charge) | |||||||||||||||||||||||||||||
| Accumulated Value | 9,650 | 9,728 | 9,513 | 10,211 | 11,092 | 11,052 | 10,169 | 9,747 | 10,352 | 10,718 | 10,765 | |||||||||||||||||||
| U.S. Government Securities Fund® - Class 529-C | ||||||||||||||||||||||||||||||
| Account Value [Line Items] | ||||||||||||||||||||||||||||||
| Line Graph and Table Measure Name | U.S. Government Securities Fund — Class 529-C (with sales charge) | |||||||||||||||||||||||||||||
| Accumulated Value | 10,000 | 10,002 | 9,708 | 10,348 | 11,162 | 11,039 | 10,156 | 9,735 | 10,339 | 10,704 | 10,751 | |||||||||||||||||||
| U.S. Government Securities Fund® - Class 529-E | ||||||||||||||||||||||||||||||
| Account Value [Line Items] | ||||||||||||||||||||||||||||||
| Line Graph and Table Measure Name | U.S. Government Securities Fund — Class 529-E | |||||||||||||||||||||||||||||
| Accumulated Value | 10,000 | 10,058 | 9,814 | 10,513 | 11,395 | 11,329 | 10,402 | 9,942 | 10,546 | 10,887 | 10,920 | |||||||||||||||||||
| U.S. Government Securities Fund® - Class 529-F-2 | ||||||||||||||||||||||||||||||
| Account Value [Line Items] | ||||||||||||||||||||||||||||||
| Line Graph and Table Measure Name | U.S. Government Securities Fund — Class 529-F-2 | |||||||||||||||||||||||||||||
| Accumulated Value | $ 10,000 | $ 10,018 | $ 9,242 | $ 8,882 | $ 9,468 | $ 9,822 | $ 9,901 | |||||||||||||||||||||||
| U.S. Government Securities Fund® - Class 529-F-3 | ||||||||||||||||||||||||||||||
| Account Value [Line Items] | ||||||||||||||||||||||||||||||
| Line Graph and Table Measure Name | U.S. Government Securities Fund — Class 529-F-3 | |||||||||||||||||||||||||||||
| Accumulated Value | 10,000 | 10,025 | 9,255 | 8,897 | 9,491 | 9,855 | 9,943 | |||||||||||||||||||||||
| U.S. Government Securities Fund® - Class R-1 | ||||||||||||||||||||||||||||||
| Account Value [Line Items] | ||||||||||||||||||||||||||||||
| Line Graph and Table Measure Name | U.S. Government Securities Fund — Class R-1 | |||||||||||||||||||||||||||||
| Accumulated Value | 10,000 | 10,006 | 9,717 | 10,361 | 11,176 | 11,062 | 10,109 | 9,626 | 10,158 | 10,446 | 10,419 | |||||||||||||||||||
| U.S. Government Securities Fund® - Class R-2 | ||||||||||||||||||||||||||||||
| Account Value [Line Items] | ||||||||||||||||||||||||||||||
| Line Graph and Table Measure Name | U.S. Government Securities Fund — Class R-2 | |||||||||||||||||||||||||||||
| Accumulated Value | 10,000 | 10,015 | 9,728 | 10,368 | 11,193 | 11,077 | 10,122 | 9,630 | 10,171 | 10,452 | 10,434 | |||||||||||||||||||
| U.S. Government Securities Fund® - Class R-2E | ||||||||||||||||||||||||||||||
| Account Value [Line Items] | ||||||||||||||||||||||||||||||
| Line Graph and Table Measure Name | U.S. Government Securities Fund — Class R-2E | |||||||||||||||||||||||||||||
| Accumulated Value | 10,000 | 10,041 | 9,779 | 10,456 | 11,312 | 11,227 | 10,284 | 9,821 | 10,391 | 10,716 | 10,720 | |||||||||||||||||||
| U.S. Government Securities Fund® - Class R-3 | ||||||||||||||||||||||||||||||
| Account Value [Line Items] | ||||||||||||||||||||||||||||||
| Line Graph and Table Measure Name | U.S. Government Securities Fund — Class R-3 | |||||||||||||||||||||||||||||
| Accumulated Value | 10,000 | 10,055 | 9,808 | 10,494 | 11,377 | 11,306 | 10,378 | 9,917 | 10,518 | 10,855 | 10,885 | |||||||||||||||||||
| U.S. Government Securities Fund® - Class R-4 | ||||||||||||||||||||||||||||||
| Account Value [Line Items] | ||||||||||||||||||||||||||||||
| Line Graph and Table Measure Name | U.S. Government Securities Fund — Class R-4 | |||||||||||||||||||||||||||||
| Accumulated Value | 10,000 | 10,088 | 9,873 | 10,605 | 11,526 | 11,497 | 10,583 | 10,143 | 10,789 | 11,168 | 11,233 | |||||||||||||||||||
| U.S. Government Securities Fund® - Class R-5E | ||||||||||||||||||||||||||||||
| Account Value [Line Items] | ||||||||||||||||||||||||||||||
| Line Graph and Table Measure Name | U.S. Government Securities Fund — Class R-5E | |||||||||||||||||||||||||||||
| Accumulated Value | 10,000 | 10,114 | 9,921 | 10,671 | 11,629 | 11,615 | 10,712 | 10,295 | 10,963 | 11,379 | 11,458 | |||||||||||||||||||
| U.S. Government Securities Fund® - Class R-5 | ||||||||||||||||||||||||||||||
| Account Value [Line Items] | ||||||||||||||||||||||||||||||
| Line Graph and Table Measure Name | U.S. Government Securities Fund — Class R-5 | |||||||||||||||||||||||||||||
| Accumulated Value | 10,000 | 10,118 | 9,931 | 10,700 | 11,671 | 11,668 | 10,773 | 10,355 | 11,047 | 11,469 | 11,568 | |||||||||||||||||||
| U.S. Government Securities Fund® - Class R-6 | ||||||||||||||||||||||||||||||
| Account Value [Line Items] | ||||||||||||||||||||||||||||||
| Line Graph and Table Measure Name | U.S. Government Securities Fund — Class R-6 | |||||||||||||||||||||||||||||
| Accumulated Value | 10,000 | 10,123 | 9,943 | 10,718 | 11,690 | 11,693 | 10,800 | 10,395 | 11,087 | 11,525 | 11,622 | |||||||||||||||||||
| Bloomberg U.S. Aggregate Index [Member] | ||||||||||||||||||||||||||||||
| Account Value [Line Items] | ||||||||||||||||||||||||||||||
| Line Graph and Table Measure Name | Bloomberg U.S. Aggregate Index | |||||||||||||||||||||||||||||
| Accumulated Value | 10,000 | 10,000 | 10,000 | 10,357 | 10,042 | 10,049 | 10,248 | 8,885 | 9,944 | 11,291 | 8,779 | 10,955 | 12,022 | 9,420 | 11,665 | 12,012 | 9,715 | 11,655 | 10,628 | 9,899 | 10,313 | 10,502 | 10,189 | 11,268 | 10,933 | 11,621 | 11,276 | 11,841 | 11,489 | |
| Bloomberg U.S. Government/Mortgage Backed Securities Index [Member] | ||||||||||||||||||||||||||||||
| Account Value [Line Items] | ||||||||||||||||||||||||||||||
| Line Graph and Table Measure Name | Bloomberg U.S. Government/Mortgage Backed Securities Index | |||||||||||||||||||||||||||||
| Accumulated Value | $ 10,000 | $ 10,000 | $ 10,000 | $ 10,292 | $ 9,925 | $ 9,984 | $ 10,179 | $ 8,903 | $ 9,875 | $ 11,095 | $ 8,721 | $ 10,764 | $ 11,761 | $ 9,293 | $ 11,410 | $ 11,613 | $ 9,549 | $ 11,266 | $ 10,416 | $ 9,725 | $ 10,105 | $ 10,203 | $ 9,898 | $ 10,872 | $ 10,548 | $ 11,172 | $ 10,839 | $ 11,378 | $ 11,038 | |