Income Tax (Provision for Income Tax Expense) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Current Income Tax Expense (Benefit), Continuing Operations [Abstract]
Current Federal Tax Expense (Benefit)	$ (18)	$ 10	$ 91
Current Foreign Tax Expense (Benefit)	58	120	71
Current Income Tax Expense (Benefit)	40	130	162
Deferred Income Tax Expense (Benefit), Continuing Operations [Abstract]
Deferred Federal Income Tax Expense (Benefit)	236	32	19
Deferred Foreign Income Tax Expense (Benefit)	(25)	35	34
Deferred income taxes	211	67	53
Income Tax Expense (Benefit)	$ 251	$ 197	$ 215