Restructuring Charges (Schedule of restructuring charges) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014		Sep. 30, 2013
Restructuring Reserve [Roll Forward]
Beginning reserve balance			$ 35
Charged to Costs and Expenses	(2)	1	(2)	[1]	12
Payments and Other			(11)
Ending reserve balance	22		22
Branch closure charges
Restructuring Reserve [Roll Forward]
Beginning reserve balance			33
Charged to Costs and Expenses			(2)	[1]
Payments and Other			(9)
Ending reserve balance	22		22
Severance costs
Restructuring Reserve [Roll Forward]
Beginning reserve balance			2
Charged to Costs and Expenses			0	[1]
Payments and Other			(2)
Ending reserve balance	0		0
Closed Restructuring Program
Restructuring Reserve [Roll Forward]
Beginning reserve balance			13
Charged to Costs and Expenses			(1)	[1]
Payments and Other			(3)
Ending reserve balance	9		9
Closed Restructuring Program | Branch closure charges
Restructuring Reserve [Roll Forward]
Beginning reserve balance			13
Charged to Costs and Expenses			(1)	[1]
Payments and Other			(3)
Ending reserve balance	9		9
Closed Restructuring Program | Severance costs
Restructuring Reserve [Roll Forward]
Beginning reserve balance			0
Charged to Costs and Expenses			0	[1]
Payments and Other			0
Ending reserve balance	0		0
RSC Merger Related Restructuring Program
Restructuring Reserve [Roll Forward]
Beginning reserve balance			22
Charged to Costs and Expenses			(1)	[1]
Payments and Other			(8)
Ending reserve balance	13		13
RSC Merger Related Restructuring Program | Branch closure charges
Restructuring Reserve [Roll Forward]
Beginning reserve balance			20
Charged to Costs and Expenses			(1)	[1]
Payments and Other			(6)
Ending reserve balance	13		13
RSC Merger Related Restructuring Program | Severance costs
Restructuring Reserve [Roll Forward]
Beginning reserve balance			2
Charged to Costs and Expenses			0	[1]
Payments and Other			(2)
Ending reserve balance	$ 0		$ 0

[1] Reflected in our condensed consolidated statements of income as “Restructuring charge.” The income for the nine months ended September 30, 2014 primarily reflects buyouts or settlements of real estate leases for less than the recognized reserves. These charges are not allocated to our reportable segments.