Allowance for Credit Losses - Summary (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Allowance for loan losses
Beginning balance	$ 24,345	$ 22,420	$ 19,726
Gross charge-offs	12,040	10,519	7,653
Gross recoveries collected	(2,191)	(1,881)	(1,444)
Net charge-offs	9,849	8,638	6,209
Provision for loan losses	11,264	10,494	9,468
Other	5	69	22
Ending balance	25,765	24,345	22,420
Allowance for lending-related commitments
Beginning balance	2,101	1,974	2,382
Provision for lending-related commitments	2,969	128	(408)
Other	1	(1)	0
Ending balance	5,071	2,101	1,974
Total allowance for investment securities	106	152	128
Total allowance for credit losses	30,942	26,598	24,522
Allowance for loan losses by impairment methodology
Asset-specific	60	(202)	(484)
Portfolio-based	25,705	24,547	22,904
Total allowance for loan losses	25,765	24,345	22,420
Loans by impairment methodology
Asset-specific	7,848	6,717	5,625
Portfolio-based	1,401,057	1,292,873	1,275,245
Total retained loans	1,408,905	1,299,590	1,280,870
Collateral-dependent loans
Net charge-offs	9,849	8,638	6,209
Allowance for lending-related commitments by impairment methodology
Asset-specific	119	109	89
Portfolio-based	4,952	1,992	1,885
Total allowance for lending-related commitments	5,071	2,101	1,974
Lending-related commitments by impairment methodology
Asset-specific	925	737	464
Portfolio-based	603,022	535,881	544,825
Total lending-related commitments	603,947	536,618	545,289
CIB
Lending-related commitments by impairment methodology
Allowance for credit losses associated with accounts receivable	288	268	243
Collateral-dependent loans
Allowance for loan losses
Net charge-offs	549	325	186
Collateral-dependent loans
Net charge-offs	549	325	186
Loans measured at fair value of collateral less cost to sell	5,264	4,530	4,228
Cumulative effect of change in accounting principles | Accounting Standards Update 2022-02
Allowance for loan losses
Beginning balance			(587)
Allowance for loan losses by impairment methodology
Total allowance for loan losses
Consumer, excluding credit card
Allowance for loan losses
Beginning balance	1,807	1,856	2,040
Gross charge-offs	1,089	1,299	1,151
Gross recoveries collected	(510)	(625)	(519)
Net charge-offs	579	674	632
Provision for loan losses	692	624	936
Other	0	1	1
Ending balance	1,920	1,807	1,856
Allowance for lending-related commitments
Beginning balance	82	75	76
Provision for lending-related commitments	1	7	(1)
Other	0	0	0
Ending balance	83	82	75
Total allowance for credit losses	2,003	1,889	1,931
Allowance for loan losses by impairment methodology
Asset-specific	(647)	(728)	(876)
Portfolio-based	2,567	2,535	2,732
Total allowance for loan losses	1,920	1,807	1,856
Loans by impairment methodology
Asset-specific	3,457	2,805	3,287
Portfolio-based	365,284	373,529	393,988
Total retained loans	368,741	376,334	397,275
Collateral-dependent loans
Net charge-offs	579	674	632
Allowance for lending-related commitments by impairment methodology
Asset-specific	0	0	0
Portfolio-based	83	82	75
Total allowance for lending-related commitments	83	82	75
Lending-related commitments by impairment methodology
Asset-specific	0	0	0
Portfolio-based	24,358	25,608	28,248
Total lending-related commitments	24,358	25,608	28,248
Credit card lending-related commitments not permitted to have an allowance for credit losses	19,200	19,200	17,200
Consumer, excluding credit card | Collateral-dependent loans
Allowance for loan losses
Net charge-offs	7	1	6
Collateral-dependent loans
Net charge-offs	7	1	6
Loans measured at fair value of collateral less cost to sell	3,412	2,696	3,216
Consumer, excluding credit card | Cumulative effect of change in accounting principles | Accounting Standards Update 2022-02
Allowance for loan losses
Beginning balance			(489)
Allowance for loan losses by impairment methodology
Total allowance for loan losses
Credit card
Allowance for loan losses
Beginning balance	14,600	12,450	11,200
Gross charge-offs	9,164	8,198	5,491
Gross recoveries collected	(1,492)	(1,056)	(793)
Net charge-offs	7,672	7,142	4,698
Provision for loan losses	8,629	9,292	6,048
Other	0	0	0
Ending balance	15,557	14,600	12,450
Allowance for lending-related commitments
Beginning balance	0	0	0
Provision for lending-related commitments	2,200	0	0
Other	0	0	0
Ending balance	2,200	0	0
Total allowance for credit losses	17,757	14,600	12,450
Allowance for loan losses by impairment methodology
Asset-specific	0	0	0
Portfolio-based	15,557	14,600	12,450
Total allowance for loan losses	15,557	14,600	12,450
Loans by impairment methodology
Asset-specific	0	0	0
Portfolio-based	247,797	232,860	211,123
Total retained loans	247,797	232,860	211,123
Collateral-dependent loans
Net charge-offs	7,672	7,142	4,698
Allowance for lending-related commitments by impairment methodology
Asset-specific	0	0	0
Portfolio-based	2,200	0	0
Total allowance for lending-related commitments	2,200	0	0
Lending-related commitments by impairment methodology
Asset-specific	0	0	0
Portfolio-based	23,617	19	0
Total lending-related commitments	23,617	19	0
Credit card lending-related commitments not permitted to have an allowance for credit losses	1,200,000	1,000,000	915,700
Credit card | Collateral-dependent loans
Allowance for loan losses
Net charge-offs	0	0	0
Collateral-dependent loans
Net charge-offs	0	0	0
Loans measured at fair value of collateral less cost to sell	0	0	0
Credit card | Cumulative effect of change in accounting principles | Accounting Standards Update 2022-02
Allowance for loan losses
Beginning balance			(100)
Allowance for loan losses by impairment methodology
Total allowance for loan losses
Wholesale
Allowance for loan losses
Beginning balance	7,938	8,114	6,486
Gross charge-offs	1,787	1,022	1,011
Gross recoveries collected	(189)	(200)	(132)
Net charge-offs	1,598	822	879
Provision for loan losses	1,943	578	2,484
Other	5	68	21
Ending balance	8,288	7,938	8,114
Allowance for lending-related commitments
Beginning balance	2,019	1,899	2,306
Provision for lending-related commitments	768	121	(407)
Other	1	(1)	0
Ending balance	2,788	2,019	1,899
Total allowance for credit losses	11,076	9,957	10,013
Allowance for loan losses by impairment methodology
Asset-specific	707	526	392
Portfolio-based	7,581	7,412	7,722
Total allowance for loan losses	8,288	7,938	8,114
Loans by impairment methodology
Asset-specific	4,391	3,912	2,338
Portfolio-based	787,976	686,484	670,134
Total retained loans	792,367	690,396	672,472
Collateral-dependent loans
Net charge-offs	1,598	822	879
Allowance for lending-related commitments by impairment methodology
Asset-specific	119	109	89
Portfolio-based	2,669	1,910	1,810
Total allowance for lending-related commitments	2,788	2,019	1,899
Lending-related commitments by impairment methodology
Asset-specific	925	737	464
Portfolio-based	555,047	510,254	516,577
Total lending-related commitments	555,972	510,991	517,041
Credit card lending-related commitments not permitted to have an allowance for credit losses	40,000	20,500	19,700
Wholesale | Collateral-dependent loans
Allowance for loan losses
Net charge-offs	542	324	180
Collateral-dependent loans
Net charge-offs	542	324	180
Loans measured at fair value of collateral less cost to sell	1,852	1,834	1,012
Wholesale | Cumulative effect of change in accounting principles | Accounting Standards Update 2022-02
Allowance for loan losses
Beginning balance			$ 2
Allowance for loan losses by impairment methodology
Total allowance for loan losses
Credit card
Allowance for loan losses
Gross charge-offs	9,164	8,198
Loans by impairment methodology
Total retained loans	247,797	$ 232,860
Credit card | Apple Credit Card Portfolio | Credit Concentration Risk
Lending-related commitments by impairment methodology
Credit exposure for estimated drawn loans	$ 23,000