Acquisitions (Pro Forma Information) (Details) (USD $)	3 Months Ended		9 Months Ended		3 Months Ended		9 Months Ended				3 Months Ended		9 Months Ended				3 Months Ended		9 Months Ended				3 Months Ended		9 Months Ended				3 Months Ended		9 Months Ended				3 Months Ended	9 Months Ended			1 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2013 Impact of fair value mark-ups/useful life changes on depreciation		Sep. 30, 2014 Impact of fair value mark-ups/useful life changes on depreciation		Sep. 30, 2013 Impact of fair value mark-ups/useful life changes on depreciation		Sep. 30, 2013 Intangible asset amortization		Sep. 30, 2014 Intangible asset amortization		Sep. 30, 2013 Intangible asset amortization		Sep. 30, 2013 Interest expense		Sep. 30, 2014 Interest expense		Sep. 30, 2013 Interest expense		Sep. 30, 2013 Elimination of historic National Pump interest		Sep. 30, 2014 Elimination of historic National Pump interest		Sep. 30, 2013 Elimination of historic National Pump interest		Sep. 30, 2013 Elimination of merger costs		Sep. 30, 2014 Elimination of merger costs		Sep. 30, 2013 Elimination of merger costs		Sep. 30, 2013 National Pump	Sep. 30, 2014 National Pump	Sep. 30, 2013 National Pump	Sep. 30, 2014 5 3/4 percent Senior Notes	Apr. 30, 2014 9 1/4 percent Senior Notes	Sep. 30, 2014 9 1/4 percent Senior Notes	Mar. 31, 2014 Senior notes Add-on to 6 1/8 percent Senior Notes	Apr. 30, 2014 Senior notes Add-on to 6 1/8 percent Senior Notes National Pump	Mar. 31, 2014 Senior notes 5 3/4 percent Senior Notes	Apr. 30, 2014 Senior notes 5 3/4 percent Senior Notes National Pump	Apr. 30, 2014 Senior notes 9 1/4 percent Senior Notes National Pump
Business Acquisition, Pro Forma Information, Nonrecurring Adjustment [Line Items]
Revenues		$ 1,311,000,000	$ 4,121,000,000	$ 3,617,000,000																															$ 55,000,000	$ 62,000,000	$ 149,000,000
Pro forma revenues		1,366,000,000	4,183,000,000	3,766,000,000
Income before provision for income taxes	303,000,000	218,000,000	539,000,000	379,000,000																															18,000,000	20,000,000	44,000,000
Combined pretax income		236,000,000	559,000,000	423,000,000
Pro forma adjustments to combined pretax income					(1,000,000)	[1]	(1,000,000)	[1]	(3,000,000)	[1]	(13,000,000)	[2]	(12,000,000)	[2]	(39,000,000)	[2]	(8,000,000)	[3]	58,000,000	[3]	(86,000,000)	[3]	0	[4]	0	[4]	1,000,000	[4]	0	[5]	8,000,000	[5]	0	[5]
Pro forma pretax income		214,000,000	612,000,000	296,000,000
Stated interest rate																																						5.75%		9.25%		6.125%		5.75%	9.25%
Face amount																																									525,000,000		850,000,000
Gain (loss) on extinguishment of debt securities			$ (80,000,000)	$ (1,000,000)																																			$ (64,000,000)

[1] Depreciation of rental equipment and non-rental depreciation were adjusted for the fair value mark-ups of equipment acquired in the National Pump acquisition. The useful lives assigned to such equipment didn’t change significantly from the lives historically used by National Pump.

[2] The intangible assets acquired in the National Pump acquisition were amortized.

[3] In connection with the National Pump acquisition, URNA issued $525 principal amount of 6 1/8 percent Senior Notes (as an add on to our existing 6 1/8 percent Senior Notes) and $850 principal amount of 5 3/4 percent Senior Notes, and all our outstanding 9 1/4 percent Senior Notes were redeemed, as discussed in note 8 to the condensed consolidated financial statements. Interest expense was adjusted to reflect these changes in our debt portfolio. For the pro forma presentation, the $64 loss recognized upon redemption of the 9 1/4 percent Senior Notes discussed in note 8 to the condensed consolidated financial statements was moved from the nine months ended September 30, 2014 to the nine months ended September 30, 2013.

[4] Interest on National Pump historic debt was eliminated.

[5] Merger related costs, primarily comprised of financial and legal advisory fees, associated with the National Pump acquisition were eliminated as they were assumed to have been recognized prior to the pro forma acquisition date.