Consolidated Statement of Shareholders' Equity - USD ($) shares in Millions, $ in Millions		Total	Cumulative Effect, Period of Adoption, Adjustment [Member]	[1]	Common Stock [Member]	Preferred Stock [Member]	Capital Surplus [Member]	Retained Earnings [Member]	Retained Earnings [Member] Cumulative Effect, Period of Adoption, Adjustment [Member]	[1]	Treasury Stock [Member]	Accumulated Other Comprehensive Income (Loss) [Member]	Total U.S. Bancorp Shareholders' Equity [Member]	Total U.S. Bancorp Shareholders' Equity [Member] Cumulative Effect, Period of Adoption, Adjustment [Member]	[1]	Noncontrolling Interests [Member]
Beginning Balance at Dec. 31, 2019		$ 52,483	$ (1,099)		$ 21	$ 5,984	$ 8,475	$ 63,186	$ (1,099)		$ (24,440)	$ (1,373)	$ 51,853	$ (1,099)		$ 630
Shares, Beginning Balance at Dec. 31, 2019					1,534
Net income (loss)		3,460						3,440					3,440			20
Other comprehensive income (loss)		1,985										1,985	1,985
Preferred stock dividends	[2]	(229)						(229)					(229)
Common stock dividends		(1,907)						(1,907)					(1,907)
Issuance of common and treasury stock		12					(118)				130		12
Issuance of common and treasury stock, shares					3
Purchase of treasury stock		(1,649)									(1,649)		(1,649)
Purchase of treasury stock, shares					(31)
Distributions to noncontrolling interests		(19)														(19)
Net other changes in noncontrolling interests		(1)														(1)
Stock option and restricted stock grants		159					159						159
Ending Balance at Sep. 30, 2020		53,195			$ 21	5,984	8,516	63,391			(25,959)	612	52,565			630
Shares, Ending Balance at Sep. 30, 2020					1,506
Beginning Balance at Jun. 30, 2020		52,480			$ 21	5,984	8,483	62,526			(25,962)	798	51,850			630
Shares, Beginning Balance at Jun. 30, 2020					1,506
Net income (loss)		1,586						1,580					1,580			6
Other comprehensive income (loss)		(186)										(186)	(186)
Preferred stock dividends	[3]	(79)						(79)					(79)
Common stock dividends		(636)						(636)					(636)
Issuance of common and treasury stock		2					(1)				3		2
Distributions to noncontrolling interests		(5)														(5)
Net other changes in noncontrolling interests		(1)														(1)
Stock option and restricted stock grants		34					34						34
Ending Balance at Sep. 30, 2020		53,195			$ 21	5,984	8,516	63,391			(25,959)	612	52,565			630
Shares, Ending Balance at Sep. 30, 2020					1,506
Beginning Balance at Dec. 31, 2020		53,725			$ 21	5,983	8,511	64,188			(25,930)	322	53,095			630
Shares, Beginning Balance at Dec. 31, 2020					1,507
Net income (loss)		6,307						6,290					6,290			17
Other comprehensive income (loss)		(2,114)										(2,114)	(2,114)
Preferred stock dividends	[4]	(232)						(232)					(232)
Common stock dividends		(1,944)						(1,944)					(1,944)
Issuance of preferred stock		730				730							730
Issuance of common and treasury stock		39					(127)				166		39
Issuance of common and treasury stock, shares					4
Purchase of treasury stock		(1,537)									(1,537)		(1,537)
Purchase of treasury stock, shares					(28)
Distributions to noncontrolling interests		(16)														(16)
Net other changes in noncontrolling interests		4														4
Stock option and restricted stock grants		166					166						166
Redemption of preferred stock		(750)				(745)		(5)					(750)
Ending Balance at Sep. 30, 2021		54,378			$ 21	5,968	8,550	68,297			(27,301)	(1,792)	53,743			635
Shares, Ending Balance at Sep. 30, 2021					1,483
Beginning Balance at Jun. 30, 2021		53,674			$ 21	5,968	8,518	67,039			(27,305)	(1,202)	53,039			635
Shares, Beginning Balance at Jun. 30, 2021					1,483
Net income (loss)		2,034						2,028					2,028			6
Other comprehensive income (loss)		(590)										(590)	(590)
Preferred stock dividends	[5]	(84)						(84)					(84)
Common stock dividends		(686)						(686)					(686)
Issuance of common and treasury stock		3					(1)				4		3
Distributions to noncontrolling interests		(5)														(5)
Net other changes in noncontrolling interests		(1)														(1)
Stock option and restricted stock grants		33					33						33
Ending Balance at Sep. 30, 2021		$ 54,378			$ 21	$ 5,968	$ 8,550	$ 68,297			$ (27,301)	$ (1,792)	$ 53,743			$ 635
Shares, Ending Balance at Sep. 30, 2021					1,483

[1] Effective January 1, 2020, the Company adopted accounting guidance which changed impairment recognition of financial instruments to a model that is based on expected losses rather than incurred losses. Upon adoption, the Company increased its allowance for credit losses and reduced retained earnings net of deferred tax liabilities through a cumulative-effect adjustment.

[2] Reflects dividends declared per share on the Company’s Series A, Series B, Series F, Series H, Series I, Series J and Series K Non-Cumulative Perpetual Preferred Stock of $2,663.888, $665.97, $1,218.75, $965.64, $640.625, $1,325.00 and $1,031.25, respectively.

[3] Reflects dividends declared per share on the Company’s Series A, Series B, Series F, Series H, Series J and Series K Non-Cumulative Perpetual Preferred Stock of $894.444, $223.61, $406.25, $321.88, $662.50 and $343.75, respectively.

[4] Reflects dividends declared per share on the Company’s Series A, Series B, Series F, Series I, Series J, Series K, Series L and Series M Non-Cumulative Perpetual Preferred Stock of $2,654.166, $663.542, $1,218.75, $232.953, $1,325.00, $1,031.25, $703.125 and $702.778, respectively.

[5] Reflects dividends declared per share on the Company’s Series A, Series B, Series F, Series J, Series K, Series L and Series M Non-Cumulative Perpetual Preferred Stock of $894.444, $223.611, $406.25, $662.50, $343.75, $234.375 and $250.00, respectively.