Variable Interest Entities - Tax Credits (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Variable Interest Entity [Line Items]
Total revenue	$ 11,945	$ 12,148	$ 12,027
Income tax expense	372	$ 553	$ 478
VIE - not primary beneficiary
Variable Interest Entity [Line Items]
Total revenue	26
Tax credits and benefits recognized in income tax expense	239
Proportional amortization recognized in income tax expense	(182)
Income tax expense	57
Net Income Attributable To Tax Advantage Investments	$ 83