Restructuring And Asset Impairment Charges (Narrative) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended					3 Months Ended	6 Months Ended			1 Months Ended
	Jun. 30, 2012 Locations employees	Jun. 30, 2011	Jun. 30, 2012 Locations employees branches		Jun. 30, 2011	Dec. 31, 2011 branches employees	Dec. 31, 2007 Locations employees	Jun. 30, 2011 General Rentals [Member]	Jun. 30, 2011 General Rentals [Member]	Jun. 30, 2012 Current Restructuring Program [Member]		Jul. 31, 2012 Acquisition [Member] Minimum [Member] RSC [Member] Current Restructuring Program [Member]		Jul. 31, 2012 Acquisition [Member] Maximum [Member] RSC [Member] Current Restructuring Program [Member]
Restructuring Cost and Reserve [Line Items]
Employee headcount (in employees)	11,500		11,500			7,500	10,900
Number of locations (in locations)	969		969			529	697
Restructuring charge	$ 53	$ 2	$ 53	[1]	$ 3					$ 52	[1]	$ 60	[1]	$ 80	[1]
Asset impairment charges	$ 2		$ 3					$ 1	$ 1

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