Goodwill and Other Intangible Assets (Goodwill) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Goodwill [Roll Forward]
Balance at beginning of period	$ 3,272	$ 2,953	$ 2,970
Goodwill related to acquisitions	16	342
Foreign currency translation and other adjustments	(45)	(23)	(17)
Balance at end of period	3,243	3,272	2,953
General rentals
Goodwill [Roll Forward]
Balance at beginning of period	2,804	2,812	2,828
Goodwill related to acquisitions	16	12
Foreign currency translation and other adjustments	(34)	(20)	(16)
Balance at end of period	2,786	2,804	2,812
Goodwill accumulated impairment loss	1,557
Trench, power and pump
Goodwill [Roll Forward]
Balance at beginning of period	468	141	142
Goodwill related to acquisitions	0	330
Foreign currency translation and other adjustments	(11)	(3)	(1)
Balance at end of period	$ 457	$ 468	$ 141