Consolidated Balance Sheets Parentheticals - shares shares in Millions |
12 Months Ended | |
|---|---|---|
Dec. 31, 2017 |
Dec. 31, 2016 |
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| General Partner Ownership Interest Percentage | 2.00% | 2.00% |
| General Partners' Capital Account, Units Issued | 9.9 | 6.9 |
| General partner units outstanding | 9.9 | 6.9 |
| Common Units [Member] | ||
| Limited Partners' Capital Account, Units Issued | 348.6 | 57.1 |
| Partnership unitholders units outstanding | 348.6 | 57.1 |
| Class B Units [Member] | ||
| Limited Partners' Capital Account, Units Issued | 0.0 | 145.3 |
| Partnership unitholders units outstanding | 0.0 | 145.3 |
| Subordinated Units [Member] | ||
| Limited Partners' Capital Account, Units Issued | 135.4 | 135.4 |
| Partnership unitholders units outstanding | 135.4 | 135.4 |
| X | ||||||||||
- Definition The number of general partner units issued. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition The number of general partner units outstanding. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition Percentage investment held by the managing member or general partner of the limited liability company (LLC) or limited partnership (LP). Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition The number of limited partner units issued. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition The number of limited partner units outstanding. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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