Income Taxes (Details) $ in Millions	9 Months Ended
	Sep. 30, 2023 USD ($)
Valuation Allowance Rollforward [Roll Forward]
Balance at beginning of year	$ 2,800
Additions to valuation allowance charged to income tax expense	76
Releases to valuation allowance credited to income tax benefit	(6)
Foreign currency translation	(2)
Additions to valuation allowance due to NJOY Transaction (no impact to earnings)	12
Reductions to valuation allowance offset to deferred tax asset (no impact to earnings)	(663)
Balance at end of period	$ 2,217