Variable Interest Entities - Tax Credits (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Variable Interest Entity [Line Items]
Total revenue	$ 3,138	$ 3,101
Income tax expense	135	$ 139
VIE - not primary beneficiary
Variable Interest Entity [Line Items]
Total revenue	4
Tax credits and benefits recognized in income tax expense	56
Proportional amortization recognized in income tax expense	(44)
Income tax expense	12
Net benefit attributable to tax-advantaged investments included in the consolidated statement of income	$ 16