Basis of Presentation (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Excess Tax Benefit from Share-based Compensation, Operating Activities			$ 8	$ 22
Related Party Transaction, Amounts of Transaction			8
Additional Paid-In Capital
APIC Deficit Reclassified to Retained Earnings	$ 166		166
LMC
Related Party Transaction, Amounts of Transaction	$ 2	$ 3	$ 8	$ 8