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Long-Term Incentive Employee Compensation (Tables)
 12 Months Ended
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 31202220212020
Equity-based awards$18.1 $16.5 $13.4 
Liability-based awards1.0 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.
 202220212020
Restricted Stock and
Performance Units		SharesWeighted
Average
Grant Date
Fair Value		SharesWeighted
Average
Grant Date
Fair Value		SharesWeighted
Average
Grant Date
Fair Value
Outstanding as of January 10.7 $71.21 0.8 $59.25 1.0 $51.24 
Granted0.3 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 310.7 $76.36 0.7 $71.21 0.8 $59.25 
Vested pending issuance0.1 $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 31202220212020
Equity-settled RSUs0.4 0.4 0.4 
Equity-settled PSUs0.2 0.3 0.4