Business Segments (Details) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2025 USD ($)	Sep. 30, 2024 USD ($)	Sep. 30, 2025 USD ($) segment	Sep. 30, 2024 USD ($)
Segment Reporting [Abstract]
Number of operating segments | segment			3
Number of reportable segments | segment			3
Condensed Income Statement
Net interest income (taxable-equivalent basis)	$ 4,251	$ 4,166	$ 12,453	$ 12,233
Noninterest income	3,078	2,698	8,838	8,213
Total net revenue	7,329	6,864	21,291	20,446
Compensation and employee benefits	2,561	2,637	7,798	7,947
Other intangibles	125	142	372	430
Net shared services	0	0	0	0
Other direct expenses	1,511	1,425	4,440	4,500
Total noninterest expense	4,197	4,204	12,610	12,877
Income (loss) before provision and income taxes	3,132	2,660	8,681	7,569
Provision for credit losses	571	557	1,609	1,678
Income (loss) before income taxes	2,561	2,103	7,072	5,891
Income taxes and taxable-equivalent adjustment	553	381	1,527	1,232
Net income	2,008	1,722	5,545	4,659
Net (income) loss attributable to noncontrolling interests	(7)	(8)	(20)	(23)
Net income attributable to U.S. Bancorp	2,001	1,714	5,525	4,636
Average Balance Sheet
Loans	379,152	374,070	378,903	373,278
Other earning assets	238,365	233,110	234,820	230,802
Goodwill	12,634	12,521	12,584	12,494
Other intangible assets	5,262	5,635	5,369	5,909
Assets	679,605	664,640	674,150	661,363
Noninterest-bearing deposits	79,890	80,939	79,568	83,040
Interest-bearing deposits	431,892	427,818	427,519	425,536
Total deposits	511,782	508,757	507,087	508,576
Total U.S. Bancorp shareholders’ equity	62,643	58,283	61,062	56,666
Taxable-equivalent adjustment to net interest income	29	31	88	90
Lease revenue	200	195	596	577
Treasury and Corporate Support
Condensed Income Statement
Net interest income (taxable-equivalent basis)	(202)	(378)	(622)	(1,260)
Noninterest income	280	79	710	443
Total net revenue	78	(299)	88	(817)
Compensation and employee benefits	1,278	1,333	3,973	4,005
Other intangibles	0	0	0	0
Net shared services	(1,774)	(1,763)	(5,224)	(5,249)
Other direct expenses	712	632	2,076	2,167
Total noninterest expense	216	202	825	923
Income (loss) before provision and income taxes	(138)	(501)	(737)	(1,740)
Provision for credit losses	(95)	41	(52)	90
Income (loss) before income taxes	(43)	(542)	(685)	(1,830)
Income taxes and taxable-equivalent adjustment	(98)	(281)	(414)	(699)
Net income	55	(261)	(271)	(1,131)
Net (income) loss attributable to noncontrolling interests	(7)	(8)	(20)	(23)
Net income attributable to U.S. Bancorp	48	(269)	(291)	(1,154)
Average Balance Sheet
Loans	5,853	5,280	5,639	5,190
Other earning assets	225,295	219,624	219,982	218,717
Goodwill	0	0	0	0
Other intangible assets	7	9	8	9
Assets	259,508	248,307	251,806	244,792
Noninterest-bearing deposits	2,492	3,238	2,598	2,600
Interest-bearing deposits	11,728	11,216	12,001	11,146
Total deposits	14,220	14,454	14,599	13,746
Total U.S. Bancorp shareholders’ equity	16,832	12,801	15,424	10,653
Wealth, Corporate, Commercial and Institutional Banking | Operating Segments
Condensed Income Statement
Net interest income (taxable-equivalent basis)	1,823	1,889	5,363	5,679
Noninterest income	1,256	1,145	3,620	3,387
Total net revenue	3,079	3,034	8,983	9,066
Compensation and employee benefits	530	531	1,587	1,629
Other intangibles	46	52	138	156
Net shared services	522	536	1,579	1,616
Other direct expenses	235	229	711	695
Total noninterest expense	1,333	1,348	4,015	4,096
Income (loss) before provision and income taxes	1,746	1,686	4,968	4,970
Provision for credit losses	197	94	390	335
Income (loss) before income taxes	1,549	1,592	4,578	4,635
Income taxes and taxable-equivalent adjustment	387	398	1,145	1,159
Net income	1,162	1,194	3,433	3,476
Net (income) loss attributable to noncontrolling interests	0	0	0	0
Net income attributable to U.S. Bancorp	1,162	1,194	3,433	3,476
Average Balance Sheet
Loans	184,442	171,898	181,266	172,285
Other earning assets	10,734	10,740	11,819	9,693
Goodwill	4,826	4,825	4,825	4,825
Other intangible assets	772	955	817	1,007
Assets	212,924	200,267	211,262	200,950
Noninterest-bearing deposits	55,329	54,375	54,966	56,769
Interest-bearing deposits	217,748	217,180	214,765	214,975
Total deposits	273,077	271,555	269,731	271,744
Total U.S. Bancorp shareholders’ equity	22,130	21,280	21,837	21,508
Consumer and Business Banking | Operating Segments
Condensed Income Statement
Net interest income (taxable-equivalent basis)	1,849	1,928	5,459	5,712
Noninterest income	436	401	1,251	1,239
Total net revenue	2,285	2,329	6,710	6,951
Compensation and employee benefits	526	558	1,579	1,668
Other intangibles	59	67	177	201
Net shared services	705	700	2,050	2,074
Other direct expenses	314	339	928	959
Total noninterest expense	1,604	1,664	4,734	4,902
Income (loss) before provision and income taxes	681	665	1,976	2,049
Provision for credit losses	61	18	162	102
Income (loss) before income taxes	620	647	1,814	1,947
Income taxes and taxable-equivalent adjustment	155	162	454	487
Net income	465	485	1,360	1,460
Net (income) loss attributable to noncontrolling interests	0	0	0	0
Net income attributable to U.S. Bancorp	465	485	1,360	1,460
Average Balance Sheet
Loans	145,900	155,240	149,731	155,037
Other earning assets	2,331	2,738	2,997	2,300
Goodwill	4,326	4,326	4,326	4,326
Other intangible assets	4,223	4,405	4,288	4,611
Assets	158,749	168,871	163,382	168,917
Noninterest-bearing deposits	19,642	20,673	19,465	20,955
Interest-bearing deposits	202,321	199,327	200,658	199,319
Total deposits	221,963	220,000	220,123	220,274
Total U.S. Bancorp shareholders’ equity	13,363	14,244	13,540	14,550
Payment Services
Average Balance Sheet
Rewards and rebate costs and certain partner payments	811	796	2,300	2,300
Revenue generated from certain contracts with customers	2,500	2,300	7,200	6,800
Payment Services | Operating Segments
Condensed Income Statement
Net interest income (taxable-equivalent basis)	781	727	2,253	2,102
Noninterest income	1,106	1,073	3,257	3,144
Total net revenue	1,887	1,800	5,510	5,246
Compensation and employee benefits	227	215	659	645
Other intangibles	20	23	57	73
Net shared services	547	527	1,595	1,559
Other direct expenses	250	225	725	679
Total noninterest expense	1,044	990	3,036	2,956
Income (loss) before provision and income taxes	843	810	2,474	2,290
Provision for credit losses	408	404	1,109	1,151
Income (loss) before income taxes	435	406	1,365	1,139
Income taxes and taxable-equivalent adjustment	109	102	342	285
Net income	326	304	1,023	854
Net (income) loss attributable to noncontrolling interests	0	0	0	0
Net income attributable to U.S. Bancorp	326	304	1,023	854
Average Balance Sheet
Loans	42,957	41,652	42,267	40,766
Other earning assets	5	8	22	92
Goodwill	3,482	3,370	3,433	3,343
Other intangible assets	260	266	256	282
Assets	48,424	47,195	47,700	46,704
Noninterest-bearing deposits	2,427	2,653	2,539	2,716
Interest-bearing deposits	95	95	95	96
Total deposits	2,522	2,748	2,634	2,812
Total U.S. Bancorp shareholders’ equity	$ 10,318	$ 9,958	$ 10,261	$ 9,955