Asset Impairment, Exit and Implementation Costs (Narrative) (Details) - USD ($)	1 Months Ended	12 Months Ended			27 Months Ended	36 Months Ended
	Dec. 31, 2018	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2018	Dec. 31, 2018
Restructuring Cost and Reserve [Line Items]
Asset impairment, exit costs and implementation costs		$ 450,000,000	$ 77,000,000	$ 173,000,000
Payments for restructuring		32,000,000	71,000,000
Refocus of Innovative Product Efforts [Member]
Restructuring Cost and Reserve [Line Items]
Asset impairment, exit costs and implementation costs		272,000,000
Refocus of Innovative Product Efforts [Member] | Asset Impairment and Exit Costs [Member]
Restructuring Cost and Reserve [Line Items]
Asset impairment, exit costs and implementation costs		209,000,000
Refocus of Innovative Product Efforts [Member] | Other Restructuring [Member]
Restructuring Cost and Reserve [Line Items]
Asset impairment, exit costs and implementation costs		63,000,000
Cost Reduction Program [Member]
Restructuring Cost and Reserve [Line Items]
Asset impairment, exit costs and implementation costs	$ 121,000,000	121,000,000
Restructuring and related costs, expected savings	575,000,000
Expected restructuring related costs	210,000,000	210,000,000			$ 210,000,000	$ 210,000,000
Payments for restructuring		0
Cost Reduction Program [Member] | Corporate, Non-Segment [Member]
Restructuring Cost and Reserve [Line Items]
Asset impairment, exit costs and implementation costs		3,000,000
Cost Reduction Program [Member] | Smokeable Products [Member]
Restructuring Cost and Reserve [Line Items]
Asset impairment, exit costs and implementation costs		86,000,000
Cost Reduction Program [Member] | Smokeless Products [Member]
Restructuring Cost and Reserve [Line Items]
Asset impairment, exit costs and implementation costs		14,000,000
Cost Reduction Program [Member] | All Other [Member]
Restructuring Cost and Reserve [Line Items]
Asset impairment, exit costs and implementation costs		18,000,000
Cost Reduction Program [Member] | Other Restructuring [Member]
Restructuring Cost and Reserve [Line Items]
Expected restructuring related costs	50,000,000	50,000,000			50,000,000	50,000,000
Cost Reduction Program [Member] | Employee Severance [Member]
Restructuring Cost and Reserve [Line Items]
Expected restructuring related costs	160,000,000	160,000,000			160,000,000	160,000,000
Facility Consolidation [Member]
Restructuring Cost and Reserve [Line Items]
Asset impairment, exit costs and implementation costs		6,000,000	78,000,000	71,000,000
Restructuring and related cost, cost incurred to date	155,000,000	155,000,000			155,000,000	155,000,000
Payments for restructuring		34,000,000			97,000,000
Facility Consolidation [Member] | Other Restructuring [Member]
Restructuring Cost and Reserve [Line Items]
Expected restructuring related costs	60,000,000	60,000,000			60,000,000	60,000,000
Facility Consolidation [Member] | Accelerated Depreciation And Asset Impairment [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and related cost, cost incurred to date	55,000,000	55,000,000			55,000,000	55,000,000
Facility Consolidation [Member] | Employee Severance [Member]
Restructuring Cost and Reserve [Line Items]
Expected restructuring related costs	$ 40,000,000	$ 40,000,000			$ 40,000,000	40,000,000
Productivity Initiative [Member]
Restructuring Cost and Reserve [Line Items]
Asset impairment, exit costs and implementation costs				132,000,000
Payments for restructuring			$ 32,000,000			$ 106,000,000
Productivity Initiative [Member] | Other Restructuring [Member]
Restructuring Cost and Reserve [Line Items]
Asset impairment, exit costs and implementation costs				15,000,000
Productivity Initiative [Member] | Employee Severance [Member]
Restructuring Cost and Reserve [Line Items]
Asset impairment, exit costs and implementation costs				$ 117,000,000