Restructuring And Asset Impairment Charges (Narrative) (Details) (USD $) In Millions, unless otherwise specified				3 Months Ended	6 Months Ended
Jun. 30, 2013 employees Locations	Dec. 31, 2011 Locations employees	Dec. 31, 2007 employees Locations	Jun. 30, 2013 General Rentals [Member]	Jun. 30, 2012 General Rentals [Member]	Jun. 30, 2013 General Rentals [Member]	Jun. 30, 2012 General Rentals [Member]
Restructuring Cost and Reserve [Line Items]
Employee headcount	11,500	7,500	10,900
Number of locations	824	529	697
Asset impairment charges				$ 3	$ 2	$ 4	$ 3

The charge against earnings resulting from the aggregate write down of all assets from their carrying value to their fair value.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

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-Paragraph 28

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

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Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

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-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

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-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

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