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STOCK-BASED COMPENSATION (Tables) | 6 Months Ended
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Jun. 30, 2022
Share-Based Payment Arrangement [Abstract] |
Weighted-Average Assupmtions and Fair Values Used of Performance Units Granted | The weighted-average assumptions used and the weighted-average fair values of the LTIP awards granted in 2022 and 2021 are as follows:
| 2022 |  | 2021 |
Risk-free interest rate | 2.29 | % |  | 0.19 | % |
Expected volatility | 31.90 | % |  | 30.70 | % |
Weighted-average fair value of RPUs granted | $ | 230.67 |  |  | $ | 168.05 |  |
Share payout | 107.50 | % |  | 102.39 | % |
Fair Value of Employee Stock Options Granted and Determined by Black-Scholes Valuation Model Assumptions | The fair value of each option grant is estimated using the Black-Scholes option pricing model. The weighted-average assumptions used and the weighted-average fair values of options granted in 2022 and 2021 are as follows:
| 2022 |  | 2021
Expected dividend yield | 2.35 | % |  | 3.31 | %
Risk-free interest rate | 2.39 | % |  | 0.84 | %
Expected life (in years) | 7.5 |  | 7.5
Expected volatility | 25.04 | % |  | 23.15 | %
Weighted-average fair value of options granted | $ | 48.45 |  |  | $ | 23.71 |

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- Definition Tabular disclosure of the significant assumptions used during the year to estimate the fair value of stock options, including, but not limited to: (a) expected term of share options and similar instruments, (b) expected volatility of the entity's shares, (c) expected dividends, (d) risk-free rate(s), and (e) discount for post-vesting restrictions. + 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 (f)(2) -URI https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901 + Details
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