Variable Interest Entities and Securitizations - Additional Information (Details) - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Dec. 31, 2021
Variable Interest Entity [Line Items]
Amortization method qualified affordable housing investments, amortization	$ 322	$ 317
Affordable housing tax credits	467	$ 423
Amortization method qualified affordable housing investments	4,800		$ 4,700
Qualified affordable housing investments, commitment	1,700		1,700
Carrying Amount of Assets	440,288		432,381
VIE, reporting entity involvement, maximum loss exposure	5,129		5,157
Unconsolidated
Variable Interest Entity [Line Items]
Carrying Amount of Assets	5,129		5,157
Consolidated
Variable Interest Entity [Line Items]
Carrying Amount of Assets	27,534		26,458
Affordable housing entities
Variable Interest Entity [Line Items]
VIE, reporting entity involvement, maximum loss exposure	4,774		4,774
Affordable housing entities | Unconsolidated
Variable Interest Entity [Line Items]
Carrying Amount of Assets	4,774		4,774
Total assets of the unconsolidated VIE investment funds	12,200		11,900
Affordable housing entities | Consolidated
Variable Interest Entity [Line Items]
Carrying Amount of Assets	260		263
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	2,331		2,074
Other
Variable Interest Entity [Line Items]
VIE, reporting entity involvement, maximum loss exposure	355		383
Other | Unconsolidated
Variable Interest Entity [Line Items]
Carrying Amount of Assets	355		383
Other | Consolidated
Variable Interest Entity [Line Items]
Carrying Amount of Assets	$ 0		$ 0