Contingencies (Schedule Reconciliation of the Beginning and Ending Liability Balances in Connection with Probable Contingencies) (Details) - USD ($) $ in Millions	3 Months Ended	9 Months Ended
	Sep. 30, 2016	Sep. 30, 2016	Sep. 30, 2015
Loss Contingency Accrual [Roll Forward]
Expense	$ 10	$ 10	$ 1
Pending Litigation [Member] | CVR Related Liability at Fair Value [Member]
Loss Contingency Accrual [Roll Forward]
Beginning Balance		261
Expense		(1)
Cash payments		(1)
Ending Balance	259	259
Pending Litigation [Member] | Other Probable Contingencies [Member]
Loss Contingency Accrual [Roll Forward]
Beginning Balance		10
Expense		10
Cash payments		(6)
Ending Balance	$ 14	$ 14