Contingencies Contingencies (Judgments Recorded and Paid) (Details) - Litigation Case [Domain] - USD ($) $ in Millions	3 Months Ended			6 Months Ended
	Jun. 30, 2015	Mar. 31, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Loss Contingencies Judgments Recorded and Paid [Line Items]
Accrued liability for tobacco and health litigation items at beginning of period	$ 77	$ 39	$ 7	$ 39	$ 3
Loss Contingency Accrual, Provision	5		31	48	35
Payments for tobacco and health litigation items	(5)		(4)	(10)	(4)
Accrued liability for tobacco and health litigation items at end of period	77	$ 77	34	77	34
Tobacco and Health Judgment [Member]
Loss Contingencies Judgments Recorded and Paid [Line Items]
Loss Contingency Accrual, Provision	5		0	5	3
Engle Progeny Cases, Federal [Member]
Loss Contingencies Judgments Recorded and Paid [Line Items]
Loss Contingency Accrual, Provision	0		0	43	0
Interest Expense [Member]
Loss Contingencies Judgments Recorded and Paid [Line Items]
Loss Contingency Accrual, Provision	0		0	0	1
Federal Governments Lawsuit [Member] | Health Care Cost Recovery Litigation [Member]
Loss Contingencies Judgments Recorded and Paid [Line Items]
Loss Contingency Accrual, Provision	$ 0		$ 31	$ 0	$ 31