Goodwill and Other Intangible Assets (Goodwill) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Goodwill [Roll Forward]
Balance at beginning of period	$ 4,082	$ 3,260	$ 3,243
Goodwill related to acquisitions	999	805	9
Foreign currency translation and other adjustments	(23)	17	8
Balance at end of period	5,058	4,082	3,260
Goodwill accumulated impairment loss	1,557	1,557	1,557	$ 1,557
General rentals
Goodwill [Roll Forward]
Balance at beginning of period	3,607	2,797	2,786
Goodwill related to acquisitions	752	797	5
Foreign currency translation and other adjustments	(17)	13	6
Balance at end of period	4,342	3,607	2,797
Trench, power and fluid solutions
Goodwill [Roll Forward]
Balance at beginning of period	475	463	457
Goodwill related to acquisitions	247	8	4
Foreign currency translation and other adjustments	(6)	4	2
Balance at end of period	$ 716	$ 475	$ 463
Trademarks and Trade Names [Member]
Goodwill [Line Items]
Weighted-Average Remaining Amortization Period	5 years