Consolidated Statement of Shareholders' Equity - USD ($) shares in Millions, $ in Millions		Total	Cumulative Effect, Period of Adoption, Adjustment [Member]		Common Stock [Member]	Preferred Stock [Member]	Capital Surplus [Member]	Retained Earnings [Member]	Retained Earnings [Member] Cumulative Effect, Period of Adoption, Adjustment [Member]		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]		Noncontrolling Interests [Member]
Beginning Balance at Dec. 31, 2018		$ 51,657	$ 2		$ 21	$ 5,984	$ 8,469	$ 59,065	$ 2		$ (20,188)	$ (2,322)	$ 51,029	$ 2		$ 628
Shares, Beginning Balance at Dec. 31, 2018					1,608
Net income (loss)		5,453						5,428					5,428			25
Other comprehensive income (loss)		1,149										1,149	1,149
Preferred stock dividends	[1]	(230)						(230)					(230)
Common stock dividends		(1,846)						(1,846)					(1,846)
Issuance of common and treasury stock		52					(127)				179		52
Issuance of common and treasury stock, shares					4
Purchase of treasury stock		(2,215)									(2,215)		(2,215)
Purchase of treasury stock, shares					(41)
Distributions to noncontrolling interests		(16)														(16)
Net other changes in noncontrolling interests		(7)														(7)
Stock option and restricted stock grants		148					148						148
Shares, Ending Balance at Sep. 30, 2019					1,571
Ending Balance at Sep. 30, 2019		54,147			$ 21	5,984	8,490	62,419			(22,224)	(1,173)	53,517			630
Beginning Balance at Jun. 30, 2019		53,540			$ 21	5,984	8,465	61,252			(21,465)	(1,344)	52,913			627
Shares, Beginning Balance at Jun. 30, 2019					1,584
Net income (loss)		1,917						1,908					1,908			9
Other comprehensive income (loss)		171										171	171
Preferred stock dividends	[2]	(79)						(79)					(79)
Common stock dividends		(662)						(662)					(662)
Issuance of common and treasury stock		28					(8)				36		28
Issuance of common and treasury stock, shares					1
Purchase of treasury stock		(795)									(795)		(795)
Purchase of treasury stock, shares					(14)
Net other changes in noncontrolling interests		(6)														(6)
Stock option and restricted stock grants		33					33						33
Shares, Ending Balance at Sep. 30, 2019					1,571
Ending Balance at Sep. 30, 2019		54,147			$ 21	5,984	8,490	62,419			(22,224)	(1,173)	53,517			630
Beginning Balance at Dec. 31, 2019		52,483	$ (1,099)	[3]	$ 21	5,984	8,475	63,186	$ (1,099)	[3]	(24,440)	(1,373)	51,853	$ (1,099)	[3]	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	[4]	(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
Shares, Ending Balance at Sep. 30, 2020					1,506
Ending Balance at Sep. 30, 2020		53,195			$ 21	5,984	8,516	63,391			(25,959)	612	52,565			630
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	[2]	(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
Shares, Ending Balance at Sep. 30, 2020					1,506
Ending Balance at Sep. 30, 2020		$ 53,195			$ 21	$ 5,984	$ 8,516	$ 63,391			$ (25,959)	$ 612	$ 52,565			$ 630

[1] 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 $2,760.506, $663.54, $1,218.75, $965.64, $640.625, $1,325.00 and $1,031.25, respectively.

[2] 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.

[3] 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.

[4] 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.