Consolidated Statement of Comprehensive Income (Unaudited) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Statement Of Income And Comprehensive Income [Abstract]
Net income	$ 1,430	$ 1,432	$ 4,261	$ 4,115
Other Comprehensive Income (Loss)
Changes in unrealized gains and losses on securities available-for-sale	(237)	300	(1,032)	738
Other-than-temporary impairment not recognized in earnings on securities available-for-sale	1	2	8	3
Changes in unrealized gains and losses on derivative hedges	(17)	(30)	33	(68)
Foreign currency translation	13	26	(20)	34
Changes in unrealized gains and losses on retirement plans	38		37
Reclassification to earnings of realized gains and losses	99	69	270	260
Income taxes related to other comprehensive income	40	(140)	276	(370)
Total other comprehensive income (loss)	(63)	227	(428)	597
Comprehensive income	1,367	1,659	3,833	4,712
Comprehensive (income) loss attributable to noncontrolling interests	38	42	119	112
Comprehensive income attributable to U.S. Bancorp	$ 1,405	$ 1,701	$ 3,952	$ 4,824