Goodwill and Other Intangible Assets (Acquired Intangibles) (Details) (USD $) In Millions, unless otherwise specified						6 Months Ended
	Jun. 30, 2014	Jun. 30, 2014 Non-compete agreements	Dec. 31, 2013 Non-compete agreements	Jun. 30, 2014 Customer relationships	Dec. 31, 2013 Customer relationships	Jun. 30, 2014 National Pump Non-compete agreements	Jun. 30, 2014 National Pump Customer relationships
Acquired Finite-Lived Intangible Assets [Line Items]
Weighted-Average Remaining Amortization Period						6 years	10 years
Net Carrying Amount	$ 1,218	$ 45	$ 36	$ 1,142	$ 942	$ 14	$ 263