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Share-Based Compensation (Tables) | 12 Months Ended
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Dec. 31, 2020
Share-based Payment Arrangement [Abstract] |
Schedule of share-based compensation activity | A summary of activity for the Company’s Share-Based Awards for the year ended December 31, 2020 is presented below:
| Shares or Units |  | Weighted-Average Grant-Date Fair Value (per share or unit) |  | Aggregate Intrinsic Value (in millions) |
Non-vested at December 31, 2019 | 1,052,480 |  |  | $ | 32.55 |  |  | $ | 36 |  |
Granted | 2,036,383 |  |  | 15.12 |  |  |  |
Vested | (508,031) |  |  | 28.36 |  |  |  |
Forfeited | (126,191) |  |  | 31.65 |  |  |  |
Non-vested at December 31, 2020 | 2,454,641 |  |  | $ | 19.01 |  |  | $ | 37 |  |
A summary of total share based compensation expense and unrecognized compensation expense related to the Share-Based Awards and the Company’s performance awards, the amounts allocated to each of the Company’s segments, and the amounts that were not allocated to segments during the years ended December 31, 2020, 2019, and 2018 is presented below:
| Expenses |  | Unrecognized Expense
| For the year ended December 31, |  | At December 31, 2020
(in millions) | 2020 |  | 2019 |  | 2018 |  | Amount |  | Weighted-Average Remaining Years
Share based awards |  |  |  |  |  |  |  |  |
Incentive Units | $ | 3 |  |  | $ | 12 |  |  | $ | 4 |  |  | $ | 26 |  |  | 2.9
Phantom Units | 1 |  |  | 5 |  |  | 8 |  |  | 7 |  |  | 2.8
Performance awards |  |  |  |  |  |  |  |  |
CEO Performance Award | — |  |  | — |  |  | 2 |  |  | 7 |  |  | 1.0
2018 CEO Performance Award | — |  |  | — |  |  | 2 |  |  | — |  |  | 0.0
Former CEO Performance Award | — |  |  | — |  |  | — |  |  | — |  |  | 0.0
Total expense | $ | 4 |  |  | $ | 17 |  |  | $ | 16 |  |  | $ | 40 |  |  |

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- Definition Tabular disclosure of activity for award under share-based payment arrangement. Includes, but is not limited to, outstanding award at beginning and end of year, granted, exercised, forfeited, and weighted-average grant date fair value. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (e) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(2) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + Details
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