Goodwill and Other Intangible Assets (Goodwill) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Goodwill [Roll Forward]
Balance at beginning of period	$ 3,243	$ 3,272	$ 2,953
Goodwill related to acquisitions	9	16	342
Foreign currency translation and other adjustments	8	(45)	(23)
Balance at end of period	3,260	3,243	3,272
General rentals
Goodwill [Roll Forward]
Balance at beginning of period	2,786	2,804	2,812
Goodwill related to acquisitions	5	16	12
Foreign currency translation and other adjustments	6	(34)	(20)
Balance at end of period	2,797	2,786	2,804
Goodwill accumulated impairment loss	1,557
Trench, power and pump
Goodwill [Roll Forward]
Balance at beginning of period	457	468	141
Goodwill related to acquisitions	4	0	330
Foreign currency translation and other adjustments	2	(11)	(3)
Balance at end of period	$ 463	$ 457	$ 468