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)		1,486				1,473			1,473	13
Other comprehensive income (loss)		96						96	96
Preferred stock dividends		(69)				(69)			(69)
Common stock dividends		(476)				(476)			(476)
Issuance of preferred stock		993		993					993
Call of preferred stock		(1,085)		(1,075)		(10)			(1,085)
Issuance of common and treasury stock		113			(107)		220		113
Issuance of common and treasury stock, shares			6
Purchase of treasury stock		(600)					(600)		(600)
Purchase of treasury stock, shares			(11)
Distributions to noncontrolling interests		(13)								(13)
Stock option and restricted stock grants		55			55				55
Ending Balance at Mar. 31, 2017		48,433	$ 21	5,419	8,388	51,069	(15,660)	(1,439)	47,798	635
Shares, Ending Balance at Mar. 31, 2017			1,692
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)		1,682				1,675			1,675	7
Other comprehensive income (loss)		(489)						(489)	(489)
Preferred stock dividends		(70)				(70)			(70)
Common stock dividends		(497)				(497)			(497)
Issuance of common and treasury stock		40			(109)		149		40
Issuance of common and treasury stock, shares			4
Purchase of treasury stock		(594)					(594)		(594)
Purchase of treasury stock, shares			(11)
Distributions to noncontrolling interests		(7)								(7)
Net other changes in noncontrolling interests		(1)								(1)
Stock option and restricted stock grants		83			83				83
Ending Balance at Mar. 31, 2018		$ 49,812	$ 21	$ 5,419	$ 8,438	$ 55,549	$ (18,047)	$ (2,193)	$ 49,187	$ 625
Shares, Ending Balance at Mar. 31, 2018			1,649

[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.