Variable Interest Entities - Tax Credits (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Variable Interest Entity [Line Items]
Income (loss) recorded on investments within other fee revenue	$ 2,616	$ 2,361	$ 7,494	$ 7,115
Total revenue	3,259	2,691	9,588	8,902
Net benefits included in income tax expense	195	89	531	381
VIE - not primary beneficiary
Variable Interest Entity [Line Items]
Income (loss) recorded on investments within other fee revenue	7	8	18	23
Total revenue	7	8	18	23
Tax credits and benefits recognized in income tax expense	69	68	196	202
Proportional amortization recognized in income tax expense	(55)	(52)	(154)	(156)
Net benefits included in income tax expense	14	16	42	46
Net benefit attributable to tax-advantaged investments included in the consolidated statement of income	$ 21	$ 24	$ 60	$ 69