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Unit-Based Compensation (Tables) | 3 Months Ended
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Mar. 31, 2017
Share-based Compensation [Abstract] |
Schedule of Equity Based Compensation Expense | Unit-based compensation expense related to the Partnership included in our Consolidated Statements of Operations and Comprehensive Income was as follows:
| For the Three Months Ended March 31,
| 2017 |  | 2016
| (in millions)
Phantom common units | $ | 4 |  |  | $ | 3 |
Allocated expense from Parent | — |  |  | — |
Total unit-based compensation expense | $ | 4 |  |  | $ | 3 |
Schedule of Nonvested Share Activity | A summary of our phantom unit award activity is as follows:
| Number of Phantom Common Units |  | Weighted-Average Grant Date Fair Value
Outstanding at December 31, 2015 | 1,147,048 |  |  | $ | 41.19 |
Granted | 966,337 |  |  | 26.95 |
Vested | (1,240 | ) |  | 36.98 |
Forfeited | (98,511 | ) |  | 39.77 |
Outstanding at December 31, 2016 | 2,013,634 |  |  | 34.43 |
Granted | 20,112 |  |  | 26.27 |
Vested | (8,557 | ) |  | 47.96 |
Forfeited | (34,880 | ) |  | 36.67 |
Outstanding at March 31, 2017 | 1,990,309 |  |  | $ | 34.22 |

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- Definition Tabular disclosure of the amount of total share-based compensation cost, including the amounts attributable to each share-based compensation plan and any related tax benefits. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (h)(1) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition Tabular disclosure of the changes in outstanding nonvested shares. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(2) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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