Acquisitions (Revenue and Pretax Income of Acquiree) (Details) - National Pump - USD ($) $ in Millions		3 Months Ended		6 Months Ended
		Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Business Acquisition [Line Items]
Revenue		$ 54	$ 67	$ 111	$ 67
Pretax (loss) income	[1]	$ (2)	$ 14	$ (4)	$ 14

[1] Pretax (loss) income excludes merger related costs which are not allocated to our segments. Pretax loss for the three and six months ended June 30, 2015 primarily reflects volume and pricing pressure associated with upstream oil and gas customers, and the amortization of the intangible assets acquired in the National Pump acquisition.