Variable Interest Entities - Investments in Qualified Affordable Housing Tax Credits (Details) - USD ($)	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Variable Interest Entity [Line Items]
Proportional amortization	$ 47,000,000
Tax credits and other benefits	(58,000,000)
Equity method expenses	2,000,000	$ 0
Impairment losses	$ 0	0
Applicable Income Tax Expense [Member]
Variable Interest Entity [Line Items]
Proportional amortization		43,000,000
Tax credits and other benefits		$ (51,000,000)