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Cash And Cash Equivalents Non-Cash Activities (Details) - USD ($) $ in Millions | 6 Months Ended
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Jun. 30, 2018 | Jun. 30, 2017
NON-CASH INVESTING ACTIVITIES: |  |
Accrued capital expenditures | $ 1,015 | $ 1,364
Losses from subsidiary common unit transactions | (125) | (51)
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

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