Acquisitions (Intangibles) (Details) (RSC [Member], USD $) In Millions, unless otherwise specified	1 Months Ended
	Apr. 30, 2012 Y
Acquired Finite-Lived Intangible Assets [Line Items]
Fair value	$ 1,239	[1]
Customer Relationships [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Fair value	1,110
Life (years)	15
Trade Names, Associated Trademarks and Other [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Fair value	81
Life (years)	5
Non-Compete Agreements [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Fair value	$ 48
Life (years)	5

[1] The following table reflects the estimated fair values and useful lives of the acquired intangible assets identified based on URI's preliminary purchase accounting assessments: Fair value Life (years) Customer relationships$1,11015 Trade names, associated trademarks and other815 Non-compete agreements485 Total$1,239