Business Segments - Business Segment Results (Detail) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Segment Reporting Information [Line Items]
Noninterest income	$ 2,507	$ 2,396
Provision for credit losses	427	112
Net income (loss)	1,704	1,558
Net (income) loss attributable to noncontrolling interests	(6)	(1)
Net income (loss) attributable to U.S. Bancorp	1,698	1,557
Corporate and Commercial Banking [Member]
Segment Reporting Information [Line Items]
Net interest income (taxable-equivalent basis)	1,081	746
Noninterest income	309	247
Total income	1,390	993
Noninterest expense	613	444
Income (loss) before provision and income taxes	777	549
Provision for credit losses	3	5
Income (loss) before income taxes	774	544
Income taxes and taxable-equivalent adjustment	194	136
Net income (loss)	580	408
Net (income) loss attributable to noncontrolling interests	0	0
Net income (loss) attributable to U.S. Bancorp	580	408
Loans	150,436	115,867
Other earning assets	5,768	4,676
Goodwill	2,824	1,912
Other intangible assets	592	4
Assets	170,976	127,891
Noninterest-bearing deposits	58,447	63,010
Interest-bearing deposits	105,011	87,010
Total deposits	163,458	150,020
Total U.S. Bancorp shareholders' equity	17,350	13,729
Consumer and Business Banking [Member]
Segment Reporting Information [Line Items]
Net interest income (taxable-equivalent basis)	2,315	1,500
Noninterest income	397	454
Total income	2,712	1,954
Noninterest expense	1,776	1,398
Income (loss) before provision and income taxes	936	556
Provision for credit losses	13	48
Income (loss) before income taxes	923	508
Income taxes and taxable-equivalent adjustment	231	126
Net income (loss)	692	382
Net (income) loss attributable to noncontrolling interests	0	0
Net income (loss) attributable to U.S. Bancorp	692	382
Loans	170,132	140,429
Other earning assets	2,179	4,383
Goodwill	4,491	3,261
Other intangible assets	5,594	3,176
Assets	187,860	156,953
Noninterest-bearing deposits	43,496	31,265
Interest-bearing deposits	185,400	165,885
Total deposits	228,896	197,150
Total U.S. Bancorp shareholders' equity	16,704	12,214
Wealth Management and Investment Services [Member]
Segment Reporting Information [Line Items]
Net interest income (taxable-equivalent basis)	488	276
Noninterest income	700	595
Total income	1,188	871
Noninterest expense	668	558
Income (loss) before provision and income taxes	520	313
Provision for credit losses	(12)	8
Income (loss) before income taxes	532	305
Income taxes and taxable-equivalent adjustment	133	76
Net income (loss)	399	229
Net (income) loss attributable to noncontrolling interests	0	0
Net income (loss) attributable to U.S. Bancorp	399	229
Loans	24,335	20,707
Other earning assets	380	241
Goodwill	1,787	1,761
Other intangible assets	442	265
Assets	28,625	24,421
Noninterest-bearing deposits	21,896	27,429
Interest-bearing deposits	83,619	70,402
Total deposits	105,515	97,831
Total U.S. Bancorp shareholders' equity	4,106	3,593
Payments Services [Member]
Segment Reporting Information [Line Items]
Net interest income (taxable-equivalent basis)	651	622
Noninterest income	937	857
Total income	1,588	1,479
Noninterest expense	915	849
Income (loss) before provision and income taxes	673	630
Provision for credit losses	226	130
Income (loss) before income taxes	447	500
Income taxes and taxable-equivalent adjustment	112	125
Net income (loss)	335	375
Net (income) loss attributable to noncontrolling interests	0	0
Net income (loss) attributable to U.S. Bancorp	335	375
Loans	36,935	31,740
Other earning assets	302	1,023
Goodwill	3,320	3,325
Other intangible assets	385	464
Assets	42,860	38,499
Noninterest-bearing deposits	3,184	3,673
Interest-bearing deposits	108	160
Total deposits	3,292	3,833
Total U.S. Bancorp shareholders' equity	8,968	8,017
Treasury and Corporate Support [Member]
Segment Reporting Information [Line Items]
Net interest income (taxable-equivalent basis)	133	56
Noninterest income	164	243
Total income	297	299
Noninterest expense	583	253
Income (loss) before provision and income taxes	(286)	46
Provision for credit losses	197	(79)
Income (loss) before income taxes	(483)	125
Income taxes and taxable-equivalent adjustment	(181)	(39)
Net income (loss)	(302)	164
Net (income) loss attributable to noncontrolling interests	(6)	(1)
Net income (loss) attributable to U.S. Bancorp	(308)	163
Loans	4,912	4,223
Other earning assets	212,235	206,548
Goodwill	0	0
Other intangible assets	36	0
Assets	235,126	229,638
Noninterest-bearing deposits	2,718	2,586
Interest-bearing deposits	6,445	2,756
Total deposits	9,163	5,342
Total U.S. Bancorp shareholders' equity	5,539	15,913
Consolidated Company [Member]
Segment Reporting Information [Line Items]
Net interest income (taxable-equivalent basis)	4,668	3,200
Noninterest income	2,507	2,396
Total income	7,175	5,596
Noninterest expense	4,555	3,502
Income (loss) before provision and income taxes	2,620	2,094
Provision for credit losses	427	112
Income (loss) before income taxes	2,193	1,982
Income taxes and taxable-equivalent adjustment	489	424
Net income (loss)	1,704	1,558
Net (income) loss attributable to noncontrolling interests	(6)	(1)
Net income (loss) attributable to U.S. Bancorp	1,698	1,557
Loans	386,750	312,966
Other earning assets	220,864	216,871
Goodwill	12,422	10,259
Other intangible assets	7,049	3,909
Assets	665,447	577,402
Noninterest-bearing deposits	129,741	127,963
Interest-bearing deposits	380,583	326,213
Total deposits	510,324	454,176
Total U.S. Bancorp shareholders' equity	$ 52,667	$ 53,466