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Other Intangible Assets (Details) - USD ($)
$ in Millions
1 Months Ended 6 Months Ended 12 Months Ended
May 31, 2015
Jul. 02, 2014
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Finite-Lived Intangible Assets [Line Items]          
Amortization of Intangible Assets     $ 356 $ 353 $ 209
Finite-Lived Intangible Assets, Amortization Expense, Next Twelve Months     356    
Finite-Lived Intangible Assets, Amortization Expense, Year Two     356    
Finite-Lived Intangible Assets, Amortization Expense, Year Three     356    
Finite-Lived Intangible Assets, Amortization Expense, Year Four     356    
Finite-Lived Intangible Assets, Amortization Expense, Year Five     356    
Contractual customer relationships [Member]          
Finite-Lived Intangible Assets [Line Items]          
Finite-Lived Intangible Assets, Gross     10,635 10,633  
Finite-Lived Intangible Assets, Accumulated Amortization     $ (1,019) $ (663)  
Access Midstream Partners Acquisition [Member]          
Finite-Lived Intangible Assets [Line Items]          
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life   30 years      
Acquired Finite-lived Intangible Asset, Weighted-Average Period before Renewal or Extension   17 years      
Eagle Ford Gathering System [Member]          
Finite-Lived Intangible Assets [Line Items]          
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life 30 years        
Acquired Finite-lived Intangible Asset, Weighted-Average Period before Renewal or Extension 10 years