Goodwill and Other Intangible Assets (Acquired Intangibles) (Details) (USD $) In Millions, unless otherwise specified	9 Months Ended	12 Months Ended
	Sep. 30, 2014	Dec. 31, 2013
Acquired Finite-Lived Intangible Assets [Line Items]
Net Carrying Amount	$ 1,165	$ 1,018
Non-compete agreements
Acquired Finite-Lived Intangible Assets [Line Items]
Weighted-Average Remaining Amortization Period	42 months	40 months
Net Carrying Amount	43	36
Customer relationships
Acquired Finite-Lived Intangible Assets [Line Items]
Weighted-Average Remaining Amortization Period	12 years	13 years
Net Carrying Amount	1,096	942
National Pump | Non-compete agreements
Acquired Finite-Lived Intangible Assets [Line Items]
Weighted-Average Remaining Amortization Period	5 years
Net Carrying Amount	14
National Pump | Customer relationships
Acquired Finite-Lived Intangible Assets [Line Items]
Weighted-Average Remaining Amortization Period	10 years
Net Carrying Amount	$ 249