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Cash And Cash Equivalents Non-Cash Activities (Details) - USD ($)
$ in Millions
9 Months Ended
Sep. 30, 2018
Sep. 30, 2017
NON-CASH INVESTING ACTIVITIES:    
Accrued capital expenditures $ 1,059 $ 1,237
Losses from subsidiary common unit transactions (125) (57)
Non-Cash Financing [Abstract]    
Capital Contributions from Noncontrolling Interest 0 988
Series A Convertible Preferred Units conversion 0  
Common Unitholders    
Non-Cash Financing [Abstract]    
Series A Convertible Preferred Units conversion $ 589 $ 0