Exit and Implementation Costs (Narrative) (Details) - USD ($)	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Dec. 31, 2024
Restructuring Cost and Reserve [Line Items]
Exit or implementation costs				$ 0
Exit costs	$ 2,000,000	$ 0	$ 3,000,000	$ 354,000,000
Operating Segments [Member]
Restructuring Cost and Reserve [Line Items]
Implementation costs	11,000,000		40,000,000
Exit costs	2,000,000		3,000,000
Operating Segments [Member] | Smokeable Products Segment [Member]
Restructuring Cost and Reserve [Line Items]
Implementation costs	10,000,000		35,000,000
Exit costs	2,000,000		3,000,000
Operating Segments [Member] | Oral Tobacco Products [Member]
Restructuring Cost and Reserve [Line Items]
Implementation costs	1,000,000		5,000,000
Exit costs	0		0
Initiative [Member]
Restructuring Cost and Reserve [Line Items]
Exit or implementation costs	13,000,000		43,000,000
Restructuring and related cost, expected cost	$ 125,000,000		125,000,000		$ 125,000,000
Restructuring charges			111,000,000
Severance costs			38,000,000
Implementation costs			73,000,000
Payments for restructuring			63,000,000		74,000,000	$ 11,000,000
Initiative [Member] | Exit Costs [Member]
Restructuring Cost and Reserve [Line Items]
Payments for restructuring			12,000,000		12,000,000	0
Initiative [Member] | Implementation Costs [Member]
Restructuring Cost and Reserve [Line Items]
Payments for restructuring			$ 51,000,000		$ 62,000,000	$ 11,000,000