Consolidated Statement of Comprehensive Income - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Statement of Comprehensive Income [Abstract]
Net income	$ 2,285	$ 1,179
Other Comprehensive Income (Loss)
Changes in unrealized gains and losses on investment securities available-for-sale	(3,378)	2,787
Changes in unrealized gains and losses on derivative hedges	99	(257)
Foreign currency translation	25	(13)
Reclassification to earnings of realized gains and losses	18	(6)
Income taxes related to other comprehensive income (loss)	819	(635)
Total other comprehensive income (loss)	(2,417)	1,876
Comprehensive income (loss)	(132)	3,055
Comprehensive (income) loss attributable to noncontrolling interests	(5)	(8)
Comprehensive income (loss) attributable to U.S. Bancorp	$ (137)	$ 3,047