CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY (DEFICIT) (USD $) In Millions, except Share data, unless otherwise specified		Total		Common Stock	Additional Paid-In Capital	(Accumulated Deficit) Retained Earnings	Treasury Stock	Accumulated Other Comprehensive Income (Loss)
Balance at Dec. 31, 2011				$ 1	$ 487	$ (499)	$ 0	$ 75
Balance (in shares) at Dec. 31, 2011				63,000,000			0
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income		75				75
Foreign currency translation adjustments		8						8
Fixed price diesel swaps		1						1
RSC acquisition (in shares)				30,000,000
RSC acquisition					1,425
Stock compensation expense, net	[1]				55
Exercise of common stock options (in shares)		1,362,000		2,000,000
Exercise of common stock options					21
Conversion of subordinated convertible securities (in shares)				1,000,000
Conversion of subordinated convertible securities					22
4 percent Convertible Senior Notes					8
Shares repurchased and retired					(16)
Repurchase of common stock (in shares)				(3,000,000)			3,000,000
Repurchase of common stock							(115)
Excess tax benefits from share-based payment arrangements, net					(5)
Balance at Dec. 31, 2012				1	1,997	(424)	(115)	84
Balance (in shares) at Dec. 31, 2012				93,000,000			3,000,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income		387	[2]			387
Foreign currency translation adjustments		(65)						(65)
Fixed price diesel swaps		0
Stock compensation expense, net					46
Exercise of common stock options (in shares)		484,000		1,000,000
Exercise of common stock options					6
Conversion of subordinated convertible securities (in shares)				1,000,000
Conversion of subordinated convertible securities					40
4 percent Convertible Senior Notes	[3]				(14)
Shares repurchased and retired					(21)
Repurchase of common stock (in shares)				(2,000,000)			2,000,000
Repurchase of common stock							(94)
Balance at Dec. 31, 2013		1,828		1	2,054	(37)	(209)	19	[4]
Balance (in shares) at Dec. 31, 2013				93,000,000			5,000,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income		540	[5]			540
Foreign currency translation adjustments		(90)						(90)	[4]
Fixed price diesel swaps		(3)						(3)	[4]
Stock compensation expense, net					74
Exercise of common stock options (in shares)		213,000		0
Exercise of common stock options					2
Conversion of subordinated convertible securities (in shares)	[6]			10,000,000
4 percent Convertible Senior Notes	[6]				58
Shares repurchased and retired					(20)
Repurchase of common stock (in shares)				(5,000,000)			5,000,000
Repurchase of common stock							(593)
Balance at Dec. 31, 2014		$ 1,796		$ 1	$ 2,168	$ 503	$ (802)	$ (74)	[4]
Balance (in shares) at Dec. 31, 2014				98,000,000			10,000,000

[1] Includes net stock compensation expense as reported as a separate component in our consolidated statements of cash flows, and net stock compensation expense included in “Restructuring charge” and "Merger related costs" as reported in our consolidated statements of cash flows.

[2] The fourth quarter of 2013 includes a reduction in bad debt expense of $17 as compared to the fourth quarter of 2012 primarily due to improved receivable aging. In the fourth quarter of 2013, we recognized a benefit of $3 in cost of equipment rentals, excluding depreciation related to our provision for self-insurance reserves.

[3] Reflects amortization of the original issue discount on the 4 percent Convertible Senior Notes (an amount equal to the unamortized portion of the original issue discount is reflected as “temporary equity” in our consolidated balance sheet) and a reduction reflecting the excess of the cash transferred upon conversion of a portion of the 4 percent Convertible Senior Notes during the year ended December 31, 2013 over the principal amount of the converted notes, net of cash received from the option counterparties to our convertible note hedges upon the conversion. See note 12 to our consolidated financial statements for additional detail.

[4] As of December 31, 2014, 2013 and 2012, the Accumulated Other Comprehensive Income (Loss) balance primarily reflects foreign currency translation adjustments.

[5] The fourth quarter of 2014 includes an increase in bad debt expense of $8 as compared to the fourth quarter of 2013 primarily due to improved receivable aging which reduced the expense in the fourth quarter of 2013. Additionally, the fourth quarter of 2014 includes an increase in stock compensation, net of $14 as compared to the fourth quarter of 2013 primarily due to improved profitability which resulted in increased performance based stock compensation.

[6] eflects amortization of the original issue discount on the 4 percent Convertible Senior Notes (an amount equal to the unamortized portion of the original issue discount is reflected as “temporary equity” in our consolidated balance sheet) and cash received from the option counterparties to our convertible note hedges associated with conversions of a portion of our 4 percent Convertible Senior Notes. See note 12 to our consolidated financial statements for additional detail.