Goodwill and Other Intangible Assets (Other Intangible Assets Associated with Acquisition) (Details) - USD ($)	9 Months Ended	12 Months Ended
	Sep. 30, 2017	Dec. 31, 2016
Finite-Lived Intangible Assets [Line Items]
Net Amount	$ 759,000,000	$ 742,000,000
Customer relationships
Finite-Lived Intangible Assets [Line Items]
Weighted-Average Remaining Amortization Period	9 years	10 years
Net Amount	$ 752,000,000	$ 728,000,000
NES Rentals Holdings II, Inc.
Finite-Lived Intangible Assets [Line Items]
Residual value	$ 0
NES Rentals Holdings II, Inc. | Customer relationships
Finite-Lived Intangible Assets [Line Items]
Weighted-Average Remaining Amortization Period	10 years
Net Amount	$ 125,000,000