Guarantees and Contingent Liabilities - Other Guarantees and Contingent Liabilities (Details) $ in Millions	Dec. 31, 2023 USD ($)
Other
Guarantor Obligations [Line Items]
Collateral Held	$ 0
Carrying Amount	21
Maximum Potential Future Payments	2,696
Standby letters of credit
Guarantor Obligations [Line Items]
Collateral Held	0
Carrying Amount	20
Maximum Potential Future Payments	10,999
Third party borrowing arrangements
Guarantor Obligations [Line Items]
Collateral Held	0
Carrying Amount	0
Maximum Potential Future Payments	5
Securities lending indemnifications
Guarantor Obligations [Line Items]
Collateral Held	6,924
Carrying Amount	0
Maximum Potential Future Payments	6,679
Asset sales
Guarantor Obligations [Line Items]
Collateral Held	0
Carrying Amount	106
Maximum Potential Future Payments	10,263
Merchant processing
Guarantor Obligations [Line Items]
Collateral Held	815
Carrying Amount	71
Maximum Potential Future Payments	140,288
Tender option bond program guarantee
Guarantor Obligations [Line Items]
Collateral Held	607
Carrying Amount	0
Maximum Potential Future Payments	$ 589

The current carrying amount of the liability for the freestanding or embedded guarantor's obligations under the guarantee or each group of similar guarantees.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 460
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 4
-Subparagraph (c)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147482425/460-10-50-4

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 460
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 4
-Subparagraph (a)(1)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147482425/460-10-50-4

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 460
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 4
-Subparagraph (b)(1)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147482425/460-10-50-4

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Topic 460
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 4
-Subparagraph (c)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147482425/460-10-50-4

Reference 4: http://www.xbrl.org/2003/role/disclosureRef
-Topic 460
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 4
-Subparagraph (f)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147482425/460-10-50-4

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Maximum potential amount of future payments (undiscounted) the guarantor could be required to make under the guarantee or each group of similar guarantees before reduction for potential recoveries under recourse or collateralization provisions.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 460
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 4
-Subparagraph (b)(1)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147482425/460-10-50-4

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Guarantee obligations collateral held.

+ References

No definition available.

+ Details

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Namespace Prefix:	usb_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Details

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Namespace Prefix:
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- Details

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Data Type:	na
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- Details

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Data Type:	na
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- Details

Name:	us-gaap_LossContingenciesByNatureOfContingencyAxis=us-gaap_IndemnificationGuaranteeMember
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Data Type:	na
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- Details

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Data Type:	na
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- Details

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- Details

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Data Type:	na
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