Acquisitions (Assets Acquired and Liabilities Assumed) (Details) (USD $) In Millions, unless otherwise specified	Sep. 30, 2014		Dec. 31, 2013		Apr. 30, 2014 National Pump		Sep. 30, 2014 Trench safety, power and HVAC, and pump solutions		Dec. 31, 2013 Trench safety, power and HVAC, and pump solutions		Apr. 30, 2014 Trench safety, power and HVAC, and pump solutions National Pump		Sep. 30, 2014 General rentals		Dec. 31, 2013 General rentals		Apr. 30, 2014 General rentals National Pump
Business Acquisition [Line Items]
Accounts receivable, net of allowance for doubtful accounts					$ 44	[1]
Inventory					19
Deferred taxes					11
Rental equipment					178
Property and equipment					10
Intangibles					289	[2]
Other assets					1
Total identifiable assets acquired					552
Current liabilities					(25)
Total liabilities assumed					(25)
Net identifiable assets acquired					527
Goodwill	3,270	[3]	2,953	[3]	322	[4]	459	[3]	141	[3]	310	[4]	2,811	[3]	2,812	[3]	12	[4]
Net assets acquired					849
Accounts receivable, gross					47
Goodwill, amount expected to be deductible for income tax purposes					344
Estimated uncollectible receivables					$ 3

[1] The fair value of accounts receivables acquired was $44, and the gross contractual amount was $47. We estimated that $3 will be uncollectible.

[2] The following table reflects the estimated fair values and useful lives of the acquired intangible assets identified based on our purchase accounting assessments: Fair value Life (years) Customer relationships$27410 Non-compete agreements156 Total$289

[3] 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.

[4] $310 of the goodwill was assigned to our trench safety, power and HVAC (“heating, ventilating and air conditioning”), and pump solutions segment and $12 of the goodwill was assigned to our general rentals segment. The level of goodwill that resulted from the merger is primarily reflective of National Pump's going-concern value, the value of National Pump's assembled workforce, new customer relationships expected to arise from the merger, and operational synergies that we expect to achieve that would not be available to other market participants. $344 of goodwill is expected to be deductible for income tax purposes.