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Stock-Based Compensation (Tables)
 12 Months Ended
Dec. 31, 2022
Share-Based Payment Arrangement [Abstract]  
Restricted Stock Unit Activity
The following table summarizes information about vested and nonvested RSUs for 2022:
 RSUs
 SharesWeighted-Average
Grant Date
Fair Value
Nonvested at January 11.7 $54.31 
Granted 0.4 $112.66 
Vested(0.8)$51.68 
Forfeited(0.1)$82.41 
Nonvested at December 311.2 $75.14 
Weighted Average Grant-Date Fair Value of Restricted Stock Units Granted and Total Fair Value of Restricted Stock Units Vested
The weighted average grant-date fair value of RSUs and total fair value of RSUs vested are summarized in the following table:
202220212020
Weighted average grant-date fair value of RSUs granted $112.66 $85.45 $44.28 
Total fair value of RSUs vested (in millions)$85.7 $51.8 $23.2 
Total Stock-Based Compensation Expense
The following table summarizes the total stock-based compensation expense recognized in Selling, General, and Administrative Expenses in the Consolidated Statements of Income and the total recognized tax benefit related thereto:
202220212020
RSUs$31.5 $35.0 $30.0 
Stock options
— — 0.1 
Restricted stock— — 0.1 
Total stock-based compensation expense$31.5 $35.0 $30.2 
Tax benefit related to stock-based compensation expense$4.0 $2.4 $2.6