Variable Interest Entities - Investments in Qualified Affordable Housing Tax Credits (Details) - USD ($)	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Affordable Housing Investments
Variable Interest Entity [Line Items]
Impairment losses	$ 0	$ 0
Applicable income tax expense
Variable Interest Entity [Line Items]
Proportional amortization	43,000,000	35,000,000
Tax credits and other benefits	$ (51,000,000)	$ (41,000,000)