Consolidated Statement of Comprehensive Income (USD $) In Millions, unless otherwise specified	12 Months Ended
Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Statement of Comprehensive Income [Abstract]
Net income	$ 5,908us-gaap_ProfitLoss	$ 5,732us-gaap_ProfitLoss	$ 5,490us-gaap_ProfitLoss
Other Comprehensive Income (Loss)
Changes in unrealized gains and losses on securities available-for-sale	764	(1,223)	715
Other-than-temporary impairment not recognized in earnings on securities available-for-sale	1	8	12
Changes in unrealized gains and losses on derivative hedges	(41)	37	(74)
Foreign currency translation	(4)	(34)	14
Changes in unrealized gains and losses on retirement plans	(733)	590	(543)
Reclassification to earnings of realized gains and losses	297	373	325
Income taxes related to other comprehensive income	(109)us-gaap_OtherComprehensiveIncomeLossTax	101us-gaap_OtherComprehensiveIncomeLossTax	(172)us-gaap_OtherComprehensiveIncomeLossTax
Total other comprehensive income (loss)	175	(148)	277
Comprehensive income	6,083	5,584	5,767
Comprehensive (income) loss attributable to noncontrolling interests	(57)	104	157
Comprehensive income attributable to U.S. Bancorp	$ 6,026us-gaap_ComprehensiveIncomeNetOfTax	$ 5,688us-gaap_ComprehensiveIncomeNetOfTax	$ 5,924us-gaap_ComprehensiveIncomeNetOfTax

Amount after tax of increase (decrease) in equity from transactions and other events and circumstances from net income and other comprehensive income, attributable to parent entity. Excludes changes in equity resulting from investments by owners and distributions to owners.

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Amount before tax and reclassification adjustments of gain (loss) on foreign currency translation adjustments, foreign currency transactions designated and effective as economic hedges of a net investment in a foreign entity and intra-entity foreign currency transactions that are of a long-term-investment nature.

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Amount after tax and reclassification adjustments of other comprehensive income (loss).

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Amount of tax expense (benefit) allocated to other comprehensive income (loss).

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