Intangible Assets (Details Textual) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Finite-Lived Intangible Assets [Line Items]
Amortization expense associated with finite lived intangible assets	$ 6	$ 7	$ 7
Minimum
Finite-Lived Intangible Assets, Net, Amortization Expense, Fiscal Year Maturity [Abstract]
2016	4
2017	4
2018	4
2019	4
2020	4
Maximum
Finite-Lived Intangible Assets, Net, Amortization Expense, Fiscal Year Maturity [Abstract]
2016	6
2017	6
2018	6
2019	6
2020	$ 6
Customer relationship intangibles | Minimum
Finite-Lived Intangible Assets [Line Items]
Estimated useful lives	7 years
Customer relationship intangibles | Maximum
Finite-Lived Intangible Assets [Line Items]
Estimated useful lives	19 years