Income Taxes - Schedule of income tax expense (benefit) attributable to pre-tax income (loss) from continuing operations (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Income Tax Disclosure [Abstract]
Current federal tax expense (benefit)	$ 68	$ 246	$ (216)
Deferred federal income tax expense (benefit)	(564)	2,363	2,443
Current foreign tax expense (benefit)	423	271	171
Deferred foreign income tax expense (benefit)	53	145	43
Income tax expense (benefit)	$ (20)	$ 3,025	$ 2,441