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Long-Term Incentive Employee Compensation (Tables) | 12 Months Ended
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Dec. 31, 2022
Share-Based Payment Arrangement [Abstract] |
Long-Term Incentive Employee Compensation Costs | LTIP costs are primarily recorded within General and administrative expenses in our Consolidated Statements of Operations, at their grant date fair value over the requisite service period (typically three years) on a straight-line basis and are reduced by forfeitures as they occur. The following table summarizes our share-based compensation expense associated with our LTIP awards.
For the Year Ended December 31 | 2022 |  | 2021 |  | 2020
Equity-based awards | $ | 18.1 |  |  | $ | 16.5 |  |  | $ | 13.4 |
Liability-based awards | 1.0 |  |  | 1.3 |  |  | 0.8 |
Total share-based compensation expense | $ | 19.1 |  |  | $ | 17.8 |  |  | $ | 14.2 |
The income tax benefit realized during 2022, 2021 and 2020 associated with exercised stock options and vested restricted stock was $2.4, $3.2 and $3.0, respectively.
Rollforward of Outstanding Restricted Stock | The table below provides a rollforward of our outstanding RSUs and PSUs.
| 2022 |  | 2021 |  | 2020
Restricted Stock and Performance Units | Shares |  | Weighted Average Grant Date Fair Value |  | Shares |  | Weighted Average Grant Date Fair Value |  | Shares |  | Weighted Average Grant Date Fair Value
Outstanding as of January 1 | 0.7 |  |  | $ | 71.21 |  |  | 0.8 |  |  | $ | 59.25 |  |  | 1.0 |  |  | $ | 51.24 |
Granted | 0.3 |  |  | 77.72 |  |  | 0.3 |  |  | 90.14 |  |  | 0.3 |  |  | 61.13 |
Performance adjustment(a) | — |  |  | — |  |  | — |  |  | — |  |  | 0.1 |  |  | 57.88 |
Vested and issued | (0.3) |  |  | 66.20 |  |  | (0.3) |  |  | 57.36 |  |  | (0.5) |  |  | 44.86 |
Forfeited | — |  |  | — |  |  | (0.1) |  |  | 68.18 |  |  | (0.1) |  |  | 59.50 |
Outstanding as of December 31 | 0.7 |  |  | $ | 76.36 |  |  | 0.7 |  |  | $ | 71.21 |  |  | 0.8 |  |  | $ | 59.25 |
Vested pending issuance | 0.1 |  |  | $ | 63.88 |  |  | 0.1 |  |  | $ | 65.25 |  |  | 0.2 |  |  | $ | 57.88 |
(a)Represents an adjustment for performance results achieved related to outstanding PSU shares that vested during the period and are pending issuance.
Number of Outstanding Equity Settled RSUs, Cash Settled RSUs and RSAs | The table below provides the number of our outstanding shares by award type. Cash-settled RSUs and PSUs outstanding were not material.
As of December 31 | 2022 |  | 2021 |  | 2020
Equity-settled RSUs | 0.4 |  |  | 0.4 |  |  | 0.4 |
Equity-settled PSUs | 0.2 |  |  | 0.3 |  |  | 0.4 |

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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 https://asc.fasb.org/extlink&oid=128089324&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 https://asc.fasb.org/extlink&oid=128089324&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 https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901 + Details
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- Definition Tabular disclosure of option exercise prices, by grouped ranges, including the upper and lower limits of the price range, the number of shares under option, weighted average exercise price and remaining contractual option terms. + 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 -URI https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901 + Details
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- Definition Disclosure of the number and weighted-average grant date fair value for restricted stock and restricted stock units that were outstanding at the beginning and end of the year, and the number of restricted stock and restricted stock units that were granted, vested, or forfeited during the year. + References No definition available. + Details
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