Income Taxes (Valuation Allowance) (Details) - SEC Schedule, 12-09, Valuation Allowance, Deferred Tax Asset [Member] - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items]
Valuation Allowances Balance	$ 1,465	$ 842	$ 825	$ 757
Additions charged to income tax expense	170	54	136
SEC Schedule, 12-09, Valuation Allowances and Reserves, Reduction credited to goodwill	0	0	(19)
SEC Schedule, 12-09, Valuation Allowances and Reserves, Deduction	(58)	(82)	(37)
Other adjustments (1)	$ 511	$ 45	$ (12)