Variable Interest Entities and Securitizations - Additional Information (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022	Dec. 31, 2022
Variable Interest Entity [Line Items]
Amortization method qualified affordable housing investments, amortization	$ 170	$ 161
Affordable housing tax credits	177	$ 250
Amortization method qualified affordable housing investments	5,000		$ 4,900
Qualified affordable housing investments, commitment	1,900		1,800
Carrying Amount of Assets	471,660		455,249
VIE, reporting entity involvement, maximum loss exposure	5,422		5,281
Unconsolidated
Variable Interest Entity [Line Items]
Carrying Amount of Assets	5,422		5,281
Consolidated
Variable Interest Entity [Line Items]
Carrying Amount of Assets	30,712		31,045
Affordable housing entities
Variable Interest Entity [Line Items]
VIE, reporting entity involvement, maximum loss exposure	5,026		4,944
Affordable housing entities | Unconsolidated
Variable Interest Entity [Line Items]
Carrying Amount of Assets	5,026		4,944
Total assets of the unconsolidated VIE investment funds	12,800		12,500
Affordable housing entities | Consolidated
Variable Interest Entity [Line Items]
Carrying Amount of Assets	264		261
Entities that provide capital to low-income and rural communities
Variable Interest Entity [Line Items]
VIE, reporting entity involvement, maximum loss exposure	0		0
Entities that provide capital to low-income and rural communities | Unconsolidated
Variable Interest Entity [Line Items]
Carrying Amount of Assets	0		0
Entities that provide capital to low-income and rural communities | Consolidated
Variable Interest Entity [Line Items]
Carrying Amount of Assets	2,301		2,301
Other
Variable Interest Entity [Line Items]
VIE, reporting entity involvement, maximum loss exposure	396		337
Other | Unconsolidated
Variable Interest Entity [Line Items]
Carrying Amount of Assets	396		337
Other | Consolidated
Variable Interest Entity [Line Items]
Carrying Amount of Assets	$ 0		$ 0