Contingencies (Judgments Recorded and Paid) (Details) - USD ($) $ in Millions	3 Months Ended
Mar. 31, 2016	Mar. 31, 2015
Loss Contingency Accrual [Roll Forward]
Accrued liability for tobacco and health litigation items at beginning of period	$ 132	$ 39
Payments	(17)	(5)
Accrued liability for tobacco and health litigation items at end of period	153	77
Interest Expense Related To Litigation [Member]
Loss Contingency Accrual [Roll Forward]
Pre-tax charges	2	0
Aspinall [Member]
Loss Contingency Accrual [Roll Forward]
Pre-tax charges	32	0
Tobacco and Health Judgment [Member] \| Litigation Cases Results [Member]
Loss Contingency Accrual [Roll Forward]
Pre-tax charges	4	0
Engle Progeny Cases, Federal [Member] \| Litigation Cases Results [Member]
Loss Contingency Accrual [Roll Forward]
Pre-tax charges	$ 0	$ 43

Amount of loss contingency liability.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 450
-SubTopic 20
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=25496072&loc=d3e14326-108349

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Amount of payments made reducing loss contingency liability.

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Amount charged against operating income increasing loss contingency liability, after adjustments to reduce previously estimated charges.

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