Income Taxes (Details) $ in Millions	6 Months Ended
	Jun. 30, 2024 USD ($)
Valuation Allowance Rollforward [Roll Forward]
Balance at beginning of year	$ 2,256
Additions to valuation allowance charged to income tax expense	7
Releases of valuation allowance credited to income tax benefit	(94)
Foreign currency translation	0
Reductions to valuation allowance due to NJOY Transaction (no impact to earnings)	(4)
Balance at end of period	$ 2,165