Segment Reporting (Non-Participating Manufacturer Adjustment Items) (Details) - Non-Participating Manufacturer Arbitration Panel Decision - NPM Adjustment to Cost Of Sales [Member] - USD ($) $ in Millions	3 Months Ended	9 Months Ended
	Sep. 30, 2021	Sep. 30, 2021
Segment Reporting Information [Line Items]
Loss (gain) related to litigation settlement	$ (44)	$ (76)
Operating Income (Loss) [Member] | Smokeable Products Segment [Member] | PM USA [Member] | Operating Segments [Member]
Segment Reporting Information [Line Items]
Loss (gain) related to litigation settlement	(21)	(53)
Interest and other debt expense, net [Member] | Segment Reconciling Items [Member]
Segment Reporting Information [Line Items]
Loss (gain) related to litigation settlement	$ (23)	$ (23)