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Revenues, Remaining Performance Obligations (Details) $ in Millions | 3 Months Ended
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Mar. 31, 2018 USD ($)
Midstream Services [Member] |
Remaining Performance Obligation to be Recognized in the Future [Abstract] |
Remaining performance obligation | $ 12,579.5
Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2018-04-01 |
Remaining Performance Obligation to be Recognized in the Future [Abstract] |
Expected timing of satisfaction, period | 9 months
Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2018-04-01 | Midstream Services [Member] |
Remaining Performance Obligation to be Recognized in the Future [Abstract] |
Remaining performance obligation | $ 1,704.7
Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2019-01-01 |
Remaining Performance Obligation to be Recognized in the Future [Abstract] |
Expected timing of satisfaction, period | 1 year
Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2019-01-01 | Midstream Services [Member] |
Remaining Performance Obligation to be Recognized in the Future [Abstract] |
Remaining performance obligation | $ 2,155.1
Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2020-01-01 |
Remaining Performance Obligation to be Recognized in the Future [Abstract] |
Expected timing of satisfaction, period | 1 year
Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2020-01-01 | Midstream Services [Member] |
Remaining Performance Obligation to be Recognized in the Future [Abstract] |
Remaining performance obligation | $ 1,945.8
Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2021-01-01 |
Remaining Performance Obligation to be Recognized in the Future [Abstract] |
Expected timing of satisfaction, period | 1 year
Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2021-01-01 | Midstream Services [Member] |
Remaining Performance Obligation to be Recognized in the Future [Abstract] |
Remaining performance obligation | $ 1,484.3
Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2022-01-01 |
Remaining Performance Obligation to be Recognized in the Future [Abstract] |
Expected timing of satisfaction, period | 1 year
Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2022-01-01 | Midstream Services [Member] |
Remaining Performance Obligation to be Recognized in the Future [Abstract] |
Remaining performance obligation | $ 1,110.0
Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2023-01-01 |
Remaining Performance Obligation to be Recognized in the Future [Abstract] |
Expected timing of satisfaction, period |
Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2023-01-01 | Midstream Services [Member] |
Remaining Performance Obligation to be Recognized in the Future [Abstract] |
Remaining performance obligation | $ 4,179.6

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- Definition Amount of transaction price allocated to performance obligation that has not been recognized as revenue. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 270 -SubTopic 10 -Section 50 -Paragraph 1A -Subparagraph (e) -URI http://asc.fasb.org/extlink&oid=84173487&loc=SL51747714-108306 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 13 -Subparagraph (b)(1) -URI http://asc.fasb.org/extlink&oid=82913847&loc=SL49130556-203045 + Details
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- Definition Period in which remaining performance obligation is expected to be recognized as revenue, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 13 -Subparagraph (b)(1) -URI http://asc.fasb.org/extlink&oid=82913847&loc=SL49130556-203045 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 270 -SubTopic 10 -Section 50 -Paragraph 1A -Subparagraph (e) -URI http://asc.fasb.org/extlink&oid=84173487&loc=SL51747714-108306 + Details
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