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Acquisitions And Divestitures Acquisition of Control-Tec LLC (Details) - USD ($)
Nov. 30, 2015
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Business Acquisition [Line Items]        
Goodwill   $ 1,539,000,000 $ 656,000,000 $ 496,000,000
Control-Tec        
Business Acquisition [Line Items]        
Business Acquisition, Percentage of Equity Interests Acquired 100.00%      
Purchase price, cash consideration, net of cash acquired $ 104,000,000      
Contingent Consideration Arrangement, Range of Outcomes, Value, High 40,000,000      
Contingent Consideration Arrangement, Range of Outcomes, Value, Low $ 0      
Contingent Consideration Period 3 years      
Contingent consideration liability $ 20,000,000      
Total purchase price 124,000,000      
Intangible assets 66,000,000      
Other assets purchased and liabilities assumed, net 4,000,000      
Identifiable net assets acquired 70,000,000      
Goodwill 54,000,000      
Total purchase price allocation $ 124,000,000      
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life 10 years