Restructuring And Asset Impairment Charges (Narrative) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended					3 Months Ended				0 Months Ended
	Mar. 31, 2013 Locations employees		Mar. 31, 2012	Dec. 31, 2011 employees branches	Dec. 31, 2007 Locations employees	Mar. 31, 2013 General Rentals [Member]	Mar. 31, 2012 General Rentals [Member]	Mar. 31, 2013 Current Restructuring Program [Member]		Apr. 15, 2013 Scenario, Forecast [Member] Acquisition [Member] Minimum [Member] RSC [Member] Current Restructuring Program [Member]
Restructuring Cost and Reserve [Line Items]
Employee headcount	11,400			7,500	10,900
Number of locations	830			529	697
Restructuring charge	$ 6	[1]	$ 0					$ 5	[1]	$ 5	[1]
Asset impairment charges						$ 1	$ 0

[1] Reflected in our condensed consolidated statements of income as “Restructuring charge.” These charges are not allocated to our reportable segments.