Restructuring - Reserve Activity (Details) - Employee Severance and Benefits - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Restructuring Reserve Activity
Accrued liability as of January 1, 2015			$ 0
Charges (benefit)	$ 0	$ 0	62,000,000	$ 0
Payments			(59,000,000)
Accrued liability as of September 30, 2015	$ 3,000,000		$ 3,000,000