Acquisition of NJOY - Summary of Costs Incurred (Details) - NJOY Holdings, Inc. [Member] - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023
Business Acquisition [Line Items]
Business combination, acquisition related costs	$ 176	$ 72
Marketing Administration And Research Costs [Member] | Change in fair value of contingent payments [Member]
Business Acquisition [Line Items]
Business combination, acquisition related costs	140	0
Marketing Administration And Research Costs [Member] | Other Costs [Member]
Business Acquisition [Line Items]
Business combination, acquisition related costs	36	63
Interest And Other Debt Expense, Net [Member] | Financing Fees [Member]
Business Acquisition [Line Items]
Business combination, acquisition related costs	$ 0	$ 9