Consolidated Statement of Income (Unaudited) (USD $) In Millions, except Per Share data, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011
Interest Income
Loans	$ 2,650	$ 2,621	$ 7,919	$ 7,736
Loans held for sale	76	42	208	139
Investment securities	438	470	1,376	1,357
Other interest income	63	67	184	187
Total interest income	3,227	3,200	9,687	9,419
Interest Expense
Deposits	172	202	530	646
Short-term borrowings	103	143	353	407
Long-term debt	226	289	786	860
Total interest expense	501	634	1,669	1,913
Net interest income	2,726	2,566	8,018	7,506
Provision for credit losses	488	519	1,439	1,846
Net interest income after provision for credit losses	2,238	2,047	6,579	5,660
Noninterest Income
Credit and debit card revenue	213	289	650	842
Corporate payment products revenue	201	203	566	563
Merchant processing services	345	338	1,041	977
ATM processing services	87	115	263	341
Trust and investment management fees	265	241	779	755
Deposit service charges	174	183	483	488
Treasury management fees	135	137	411	418
Commercial products revenue	225	212	652	621
Mortgage banking revenue	519	245	1,461	683
Investment products fees and commissions	38	31	111	98
Securities gains (losses), net
Realized gains (losses), net	16		46	2
Total other-than-temporary impairment	(13)	(11)	(61)	(41)
Portion of other-than-temporary impairment recognized in other comprehensive income	(2)	2	(3)	17
Total securities gains (losses), net	1	(9)	(18)	(22)
Other	193	186	591	565
Total noninterest income	2,396	2,171	6,990	6,329
Noninterest Expense
Compensation	1,109	1,021	3,237	2,984
Employee benefits	225	203	714	643
Net occupancy and equipment	233	252	683	750
Professional services	144	100	364	252
Marketing and business development	96	102	285	257
Technology and communications	205	189	607	563
Postage, printing and supplies	75	76	226	226
Other intangibles	67	75	208	225
Other	455	458	1,446	1,315
Total noninterest expense	2,609	2,476	7,770	7,215
Income before income taxes	2,025	1,742	5,799	4,774
Applicable income taxes	593	490	1,684	1,314
Net income	1,432	1,252	4,115	3,460
Net (income) loss attributable to noncontrolling interests	42	21	112	62
Net income attributable to U.S. Bancorp	1,474	1,273	4,227	3,522
Net income applicable to U.S. Bancorp common shareholders	$ 1,404	$ 1,237	$ 4,034	$ 3,407
Earnings per common share	$ 0.74	$ 0.65	$ 2.13	$ 1.78
Diluted earnings per common share	$ 0.74	$ 0.64	$ 2.12	$ 1.77
Dividends declared per common share	$ 0.195	$ 0.125	$ 0.585	$ 0.375
Average common shares outstanding	1,886	1,915	1,892	1,918
Average diluted common shares outstanding	1,897	1,922	1,901	1,926