Consolidated Statement of Shareholders' Equity (Unaudited) - USD ($) shares in Millions, $ in Millions		Total	Common Stock [Member]	Preferred Stock [Member]	Capital Surplus [Member]	Retained Earnings [Member]	Treasury Stock [Member]	Accumulated Other Comprehensive Income (Loss) [Member]	Total U.S. Bancorp Shareholders' Equity [Member]	Noncontrolling Interests [Member]
Beginning Balance at Dec. 31, 2016		$ 47,933	$ 21	$ 5,501	$ 8,440	$ 50,151	$ (15,280)	$ (1,535)	$ 47,298	$ 635
Shares, Beginning Balance at Dec. 31, 2016			1,697
Net income (loss)		2,998				2,973			2,973	25
Other comprehensive income (loss)		289						289	289
Preferred stock dividends		(133)				(133)			(133)
Common stock dividends		(948)				(948)			(948)
Issuance of preferred stock		993		993					993
Redemption of preferred stock		(1,085)		(1,075)		(10)			(1,085)
Issuance of common and treasury stock		127			(111)		238		127
Issuance of common and treasury stock, shares			7
Purchase of treasury stock		(1,290)					(1,290)		(1,290)
Purchase of treasury stock, shares			(25)
Distributions to noncontrolling interests		(34)								(34)
Net other changes in noncontrolling interests		3								3
Stock option and restricted stock grants		96			96				96
Ending Balance at Jun. 30, 2017		48,949	$ 21	5,419	8,425	52,033	(16,332)	(1,246)	48,320	629
Shares, Ending Balance at Jun. 30, 2017			1,679
Beginning Balance at Dec. 31, 2017		49,666	$ 21	5,419	8,464	54,142	(17,602)	(1,404)	49,040	626
Shares, Beginning Balance at Dec. 31, 2017			1,656
Change in accounting principles at Dec. 31, 2017	[1]	(1)				299		(300)	(1)
Net income (loss)		3,440				3,425			3,425	15
Other comprehensive income (loss)		(611)						(611)	(611)
Preferred stock dividends		(134)				(134)			(134)
Common stock dividends		(990)				(990)			(990)
Issuance of common and treasury stock		48			(113)		161		48
Issuance of common and treasury stock, shares			4
Purchase of treasury stock		(1,266)					(1,266)		(1,266)
Purchase of treasury stock, shares			(24)
Distributions to noncontrolling interests		(15)								(15)
Net other changes in noncontrolling interests		3								3
Stock option and restricted stock grants		117			117				117
Ending Balance at Jun. 30, 2018		$ 50,257	$ 21	$ 5,419	$ 8,468	$ 56,742	$ (18,707)	$ (2,315)	$ 49,628	$ 629
Shares, Ending Balance at Jun. 30, 2018			1,636

[1] Includes the impact of the reduced federal statutory tax rate for corporations included in 2017 tax reform legislation, reclassified out of accumulated other comprehensive income and into retained earnings as of the beginning of the period.