Acquisitions (Purchase Price Allocation) (Details) (USD $)
In Millions, unless otherwise specified
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Apr. 30, 2014
Business Acquisition [Line Items]          
Goodwill $ 3,272 [1] $ 2,953 [1] $ 2,970 [1] $ 289 [1]  
National Pump          
Business Acquisition [Line Items]          
Accounts receivable, net of allowance for doubtful accounts         44 [2]
Inventory         19
Deferred taxes         6
Intangibles         289 [3]
Other assets         1
Total identifiable assets acquired         541
Current liabilities         (25)
Total liabilities assumed         (25)
Net identifiable assets acquired         516
Goodwill         333 [4]
Net assets acquired         849
Accounts receivable, gross         47
Accounts receivable, allowance for doubtful accounts         3
Rental Equipment | National Pump          
Business Acquisition [Line Items]          
Rental equipment and Property and equipment         172
Property and Equipment | National Pump          
Business Acquisition [Line Items]          
Rental equipment and Property and equipment         $ 10
[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] The fair value of accounts receivables acquired was $44, and the gross contractual amount was $47. We estimated that $3 would be uncollectible.
[3] 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
[4] $321 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. $348 of goodwill is expected to be deductible for income tax purposes.