Segment Information (Reconciliation to income (loss) from continuing operations) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2014		Mar. 31, 2013
Segment Reporting, Measurement Disclosures [Abstract]
Total equipment rentals gross profit	$ 379		$ 321
Gross profit from other lines of business	69		64
Selling, general and administrative expenses	(168)		(160)
Merger related costs	(1)		(6)
Restructuring charge	(1)	[1]	(6)
Non-rental depreciation and amortization	(60)		(64)
Interest expense, net	(125)		(118)
Interest expense- subordinated convertible debentures	0		(2)
Other income, net	1		1
Income before provision for income taxes	$ 94		$ 30

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