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Stock-Based Payments (Tables)
12 Months Ended
Dec. 31, 2021
Share-based Payment Arrangement, Noncash Expense [Abstract]  
Compensation expense for stock-based payments and total income tax benefit recognized
Total compensation expense for stock-based payments and total income tax benefit recognized on the consolidated statements of income for stock-based awards at December 31, 2021, 2020 and 2019 were as follows:
(in millions)202120202019
Compensation expense$76.4 $96.9 $85.8 
Income tax benefit recognized20.6 23.6 27.3 
Share-based Compensation, Stock Options, Activity [Table Text Block] The following table summarizes stock option activity for 2021. Aggregate intrinsic value is in millions.
Number of SharesWeighted
Average
Exercise
Price
Weighted Average Remaining Contractual Life (in years)Aggregate Intrinsic Value
Outstanding at December 31, 2020102,823 $54 0.7$13.1 
Exercised(101,363)54 
Cancelled(440)54 
Outstanding at December 31, 20211,020 56 0.50.2 
Exercisable at December 31, 20211,020 56 0.50.2 
Schedule of Nonvested Share Activity [Table Text Block]
The following table summarizes restricted stock, restricted stock units and performance shares activity for 2021:
Number of SharesWeighted
Average
Grant Date
Fair Value
Outstanding at December 31, 20201,264,287 $190 
Granted499,632 202 
Vested(335,411)167 
Cancelled(313,453)180 
Outstanding at December 31, 20211,115,055 205