Income Taxes - Tax Expense (Benefit) (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Income Tax Disclosure [Abstract]
Income before income taxes	$ 33	$ 1,793
Current tax expense	0	26
Deferred income tax expense	7	378
Income tax expense	$ 7	$ 404
Current tax expense (as percent)	0.00%	1.50%
Deferred tax expense (as percent)	21.20%	21.00%
Effective income tax rate	21.20%	22.50%