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Revenue Remaining Performance Obligations (Details)
$ in Millions
 3 Months Ended
Mar. 31, 2018
USD ($)
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]  
Contract with customer, liability $ 96
Remaining performance obligation, expected timing of satisfaction, years 19 years
L&S  
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]  
2018 $ 704
2019 929
2020 929
2021 929
2022 and thereafter 5,577
Total revenue on remaining performance obligations 9,068 [1],[2]
G&P  
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]  
2018 91 [3]
2019 118 [3]
2020 114 [3]
2021 113 [3]
2022 and thereafter 404 [3]
Total revenue on remaining performance obligations $ 840 [1],[2],[3]
[1] All fixed consideration from contracts with customers is included in the amounts presented above. Variable consideration that is constrained or not required to be estimated as it reflects our efforts to perform is excluded.
[2] Arrangements deemed implicit leases are included in “Rental income” and are excluded from this table.
[3] Only minimum volume commitments that are deemed fixed are included in the table above. The Partnership has various minimum volume commitments in processing arrangements that vary based on the actual Btu content of the gas received. These amounts are deemed variable consideration and are excluded from the table above.