Commitments and Contingencies (Details 2) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Leases, Capital
Assets acquired through capital leases	$ 10	$ 3	$ 0
Depreciation expense	19	32	42
Cash payments towards capital leases	20	32	$ 40
Assets included in property, plant and equipment	66	137
Accumulated depreciation	55	$ 108
Capital lease obligations:
2016	8
2017	4
2018	4
2019	2
2020	0
2021 and thereafter	5
Total minimum payments	23
Less: amount representing interest and executory costs	(7)
Present value of minimum payments	16
Less: current portion	(6)
Long-term portion	$ 10