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SHARE-BASED COMPENSATION | 9 Months Ended
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Sep. 30, 2019
Share-based Payment Arrangement [Abstract] |
SHARE-BASED COMPENSATION | For the three months ended September 30, 2019, the Company incurred share-based compensation costs of $12 million (2018: $15 million) related to share-settled restricted stock units and cash-settled restricted stock units. In addition, the Company recorded associated tax benefits of $2 million (2018: $3 million). For the nine months ended September 30, 2019, the Company incurred share-based compensation costs of $41 million (2018: $45 million) and recorded associated tax benefits of $7 million (2018: $6 million). During the nine months ended September 30, 2019, the fair value of share-settled restricted stock units and cash-settled restricted stock units that vested was $49 million (2018: $47 million). At September 30, 2019, there was $90 million of unrecognized share-based compensation costs (2018: $106 million) which are expected to be recognized over the weighted average period of 2.5 years (2018: 2.6 years). Share-Settled Awards The following table provides an activity summary of the Company's share-settled restricted stock units for the nine months ended September 30, 2019:
|  | Share-Settled Performance Vesting Restricted Stock Units |  | Share-Settled Service Based Restricted Stock Units |
|  | Number of restricted stock units |  | Weighted average grant date fair value(1) |  | Number of restricted stock units |  | Weighted average grant date fair value(1) |
| Nonvested restricted stock units - beginning of period | 232 |  |  | $ | 54.54 |  |  | 1,411 |  |  | $ | 54.12 |  |
| Granted | 127 |  |  | 54.70 |  |  | 522 |  |  | 54.88 |  |
| Vested | (61 | ) |  | 53.82 |  |  | (465 | ) |  | 54.20 |  |
| Forfeited | (40 | ) |  | 64.01 |  |  | (158 | ) |  | 54.54 |  |
| Nonvested restricted stock units - end of period | 258 |  |  | $ | 53.31 |  |  | 1,310 |  |  | $ | 54.34 |  |
(1) Fair value is based on the closing price of the Company's common shares on the grant date. Cash-Settled awards The following table provides an activity summary of the Company's cash-settled restricted stock units for the nine months ended September 30, 2019:
|  | Cash-Settled Performance Vesting Restricted Stock Units |  | Cash-Settled Service Based Restricted Stock Units |
|  | Number of restricted stock units |  | Number of restricted stock units |
| Nonvested restricted stock units - beginning of period | 27 |  |  | 932 |  |
| Granted | — |  |  | 363 |  |
| Vested | (12 | ) |  | (328 | ) |
| Forfeited | (9 | ) |  | (94 | ) |
| Nonvested restricted stock units - end of period | 6 |  |  | 873 |  |
At September 30, 2019, the liability for cash-settled restricted stock units, included in other liabilities in the consolidated balance sheets, was $19 million (2018: $19 million).

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- Definition The entire disclosure for share-based payment arrangement. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -URI http://asc.fasb.org/topic&trid=2228938 + Details
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- References No definition available. + Details
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