Income Taxes (Summary of Valuation Allowance) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Deferred Tax Assets, Valuation Allowance [Roll Forward]
Balance at beginning of year	$ 2,256	$ 2,800	$ 3,097
Additions to valuation allowance charged to income tax expense	244	114	429
Reductions to valuation allowance credited to income tax benefit	(1,337)	(6)	(730)
(Reductions) additions to valuation allowance due to NJOY Transaction (no impact to earnings)	(4)	12	0
Reductions to valuation allowance offset to deferred tax asset (no impact to earnings)	(491)	(663)	0
Foreign currency translation	0	(1)	4
Balance at end of year	$ 668	$ 2,256	$ 2,800