| Document and Entity Information | Jul. 15, 2021 |
| Document And Entity Information [Line Items] | |
| Document Type | 8-K |
| Document Period End Date | Jul. 15, 2021 |
| Entity Registrant Name | US BANCORP \DE\ |
| Entity File Number | 1-6880 |
| Entity Incorporation State Country Code | DE |
| Entity Tax Identification Number | 41-0255900 |
| Entity Address, Address Line One | 800 Nicollet Mall |
| Entity Address, City or Town | Minneapolis |
| Entity Address, State or Province | MN |
| Entity Address, Postal Zip Code | 55402 |
| City Area Code | 651 |
| Local Phone Number | 466-3000 |
| Written Communications | false |
| Soliciting Material | false |
| Pre Commencement Tender Offer | false |
| Pre Commencement Issuer Tender Offer | false |
| Entity Emerging Growth Company | false |
| Amendment Flag | false |
| Entity Central Index Key | 0000036104 |
| Common Stock [Member] | |
| Document And Entity Information [Line Items] | |
| Security 12b Title | Common Stock, $.01 par value per share |
| Trading Symbol | USB |
| Security Exchange Name | NYSE |
| Series A Preferred Stock [Member] | |
| Document And Entity Information [Line Items] | |
| Security 12b Title | Depositary Shares (each representing 1/100th interest in a share of Series A Non-Cumulative Perpetual Preferred Stock, par value $1.00) |
| Trading Symbol | USB PrA |
| Security Exchange Name | NYSE |
| Series B Preferred Stock [Member] | |
| Document And Entity Information [Line Items] | |
| Security 12b Title | Depositary Shares (each representing 1/1,000th interest in a share of Series B Non-Cumulative Perpetual Preferred Stock, par value $1.00) |
| Trading Symbol | USB PrH |
| Security Exchange Name | NYSE |
| Series F Preferred Stock [Member] | |
| Document And Entity Information [Line Items] | |
| Security 12b Title | Depositary Shares (each representing 1/1,000th interest in a share of Series F Non-Cumulative Perpetual Preferred Stock, par value $1.00) |
| Trading Symbol | USB PrM |
| Security Exchange Name | NYSE |
| Series K Preferred Stock [Member] | |
| Document And Entity Information [Line Items] | |
| Security 12b Title | Depositary Shares (each representing 1/1,000th interest in a share of Series K Non-Cumulative Perpetual Preferred Stock, par value $1.00) |
| Trading Symbol | USB PrP |
| Security Exchange Name | NYSE |
| 0.850% Medium-Term Notes, Series X (Senior), due June 7, 2024 [Member] | |
| Document And Entity Information [Line Items] | |
| Security 12b Title | 0.850% Medium-Term Notes, Series X (Senior), due June 7, 2024 |
| Trading Symbol | USB/24B |
| Security Exchange Name | NYSE |
| Series L Preferred Stock [Member] | |
| Document And Entity Information [Line Items] | |
| Security 12b Title | Depositary Shares (each representing 1/1,000th interest in a share of Series L Non-Cumulative Perpetual Preferred Stock, par value $1.00) |
| Trading Symbol | USB PrQ |
| Security Exchange Name | NYSE |
| Series M Preferred Stock [Member] | |
| Document And Entity Information [Line Items] | |
| Security 12b Title | Depositary Shares (each representing 1/1,000th interest in a share of Series M Non-Cumulative Perpetual Preferred Stock, par value $1.00) |
| Trading Symbol | USB PrR |
| Security Exchange Name | NYSE |
