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Cash And Cash Equivalents Non-Cash Activities (Details) - USD ($)
$ in Millions
3 Months Ended 6 Months Ended
Jun. 30, 2019
Mar. 31, 2019
Jun. 30, 2018
Mar. 31, 2018
Jun. 30, 2019
Jun. 30, 2018
NON-CASH INVESTING ACTIVITIES:            
Accrued capital expenditures         $ 714 $ 1,015
Losses from subsidiary common unit transactions         0 (125)
Lease assets obtained in exchange for new lease liabilities         15 0
Noncontrolling Interest, Decrease from Distributions to Noncontrolling Interest Holders $ 388 $ 425 $ 900 $ 893 51 0
Stock Issued During Period, Value, Conversion of Units     0      
Limited Partner [Member]            
NON-CASH INVESTING ACTIVITIES:            
Noncontrolling Interest, Decrease from Distributions to Noncontrolling Interest Holders $ 0 $ 0 0 $ 0    
Stock Issued During Period, Value, Conversion of Units     $ 589   $ 0 $ 589