Acquisitions (Revenue and Pretax Income of Acquiree) (Details) - National Pump - USD ($) $ in Millions		3 Months Ended		9 Months Ended
		Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Business Acquisition [Line Items]
Revenue		$ 59	$ 73	$ 170	$ 140
Pretax income (loss)	[1]	$ 2	$ 16	$ (2)	$ 30

[1] Pretax income (loss) excludes merger related costs which are not allocated to our segments. Pretax income (loss) for the three and nine months ended September 30, 2015 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.