Acquisition of NJOY - Summary of Costs Incurred (Details) - NJOY Holdings, Inc. [Member] - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Business Acquisition [Line Items]
Business combination, acquisition related costs	$ 44	$ 14	$ 187	$ 63
Marketing, Administration, And Research Costs [Member] | Change in fair value of contingent payments [Member]
Business Acquisition [Line Items]
Business combination, acquisition related costs	0	0	140	0
Marketing, Administration, And Research Costs [Member] | Other Costs [Member]
Business Acquisition [Line Items]
Business combination, acquisition related costs	44	13	47	54
Interest and other debt expense, net [Member] | Financing Fees [Member]
Business Acquisition [Line Items]
Business combination, acquisition related costs	$ 0	$ 1	$ 0	$ 9