Variable Interest Entities - Investments in Qualified Affordable Housing Tax Credits (Details) - USD ($)	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Affordable Housing Investments
Variable Interest Entity [Line Items]
Impairment losses	$ 0	$ 0	$ 0
Applicable income tax expense
Variable Interest Entity [Line Items]
Proportional amortization	200,000,000	189,000,000	163,000,000
Tax credits and other benefits	$ (230,000,000)	$ (219,000,000)	$ (193,000,000)