Contingencies (Judgments Recorded and Paid) (Details) - USD ($) $ in Millions	1 Months Ended	3 Months Ended								12 Months Ended
	May 31, 2016	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Loss Contingency Accrual [Roll Forward]
Accrued liability for tobacco and health litigation items at beginning of period					$ 132				$ 39	$ 132	$ 39	$ 3
Payments										(190)	(57)	(8)
Accrued liability for tobacco and health litigation items at end of period		$ 47				$ 132				47	132	39
Interest Expense Related To Litigation [Member]
Loss Contingency Accrual [Roll Forward]
Provision related to litigation recorded										7	23	2
Implementation of Corrective Communications [Member]
Loss Contingency Accrual [Roll Forward]
Provision related to litigation recorded										0	0	31
Tobacco and Health Judgment [Member]
Loss Contingency Accrual [Roll Forward]
Provision related to litigation recorded		$ 17	$ 45	$ 5	$ 38	$ 35	$ 67	$ 5	$ 43
Tobacco and Health Judgment [Member] | Litigation Cases Results [Member]
Loss Contingency Accrual [Roll Forward]
Provision related to litigation recorded										21	84	11
Engle Progeny Cases, Federal [Member] | Litigation Cases Results [Member]
Loss Contingency Accrual [Roll Forward]
Provision related to litigation recorded										0	43	0
Lights Ultra Lights Class Actions, Aspinall [Member]
Loss Contingency Accrual [Roll Forward]
Payments	$ (32)
Lights Ultra Lights Class Actions, Aspinall [Member] | Litigation Cases Results [Member]
Loss Contingency Accrual [Roll Forward]
Provision related to litigation recorded										32	0	0
Miner [Member]
Loss Contingency Accrual [Roll Forward]
Provision related to litigation recorded			$ 45
Miner [Member] | Litigation Cases Results [Member]
Loss Contingency Accrual [Roll Forward]
Provision related to litigation recorded										$ 45	$ 0	$ 0