Goodwill and Other Intangible Assets (Goodwill) (Details) (USD $) In Millions, unless otherwise specified	6 Months Ended
	Jun. 30, 2014
Goodwill [Roll Forward]
Beginning balance	$ 2,953	[1]
Goodwill related to acquisitions	340	[2]
Ending balance	3,293	[1]
General rentals
Goodwill [Roll Forward]
Beginning balance	2,812	[1]
Goodwill related to acquisitions	12	[2]
Ending balance	2,824	[1]
Goodwill, accumulated impairment loss	1,557
Trench safety, power and HVAC, and pump solutions
Goodwill [Roll Forward]
Beginning balance	141	[1]
Goodwill related to acquisitions	328	[2]
Ending balance	$ 469	[1]

[1] The total carrying amount of goodwill for all periods in the table above is reflected net of $1,557 of accumulated impairment charges, which were primarily recorded in our general rentals segment.

[2] Includes goodwill adjustments for the effect on goodwill of changes to net assets acquired during the measurement period, which were not significant to our previously reported operating results or financial condition.