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Share-based Compensation (Tables)
12 Months Ended
Dec. 31, 2021
Share-based Payment Arrangement [Abstract]  
Share-based Compensation Expense
Share-based compensation expense and the effect on diluted earnings per common share were as follows:
In millions, except per share data202120202019
Share-based compensation expense$139.2 $92.4 $109.6 
After tax$120.4 $78.3 $94.2 
Earnings per common share-diluted$0.16 $0.10 $0.12 
Schedule of Weighted Average Assumptions
Weighted-average assumptions
202120202019
Expected dividend yield2.4 %2.3 %2.7 %
Expected stock price volatility21.8 %19.1 %18.9 %
Risk-free interest rate0.7 %1.4 %2.5 %
Expected life of options (in years)
5.75.75.8
Fair value per option granted$30.91 $29.40 $25.60 
Summary of Stock Option Grants
A summary of the status of the Company’s stock option grants as of December 31, 2021, 2020 and 2019, and changes during the years then ended, is presented in the following table:
202120202019
OptionsShares in
millions
Weighted-
average
exercise
price
Weighted-
average
remaining
contractual
life in years
Aggregate
intrinsic
value in
millions
Shares in
millions
Weighted-
average
exercise
price
Shares in
millions
Weighted-
average
exercise
price
Outstanding at beginning of year13.4 $139.44 14.6 $124.21 16.6 $113.06 
Granted2.1 215.73 1.8 214.18 2.0 175.17 
Exercised(2.4)115.29 (2.8)104.58 (3.6)97.70 
Forfeited/expired(1.1)160.50   (0.2)184.69 (0.4)154.65 
Outstanding at end of year12.0 $156.13 5.8$1,343.7 13.4 $139.44 14.6 $124.21 
Exercisable at end of year7.8 $130.70 4.5$1,078.2 8.8 9.2  
Summary of Restricted Stock Unit Activity
A summary of the Company’s RSU activity during the years ended December 31, 2021, 2020 and 2019 is presented in the following table:
 202120202019
RSUsShares in
millions
Weighted-
average
grant date
fair value
Shares in
millions
Weighted-
average
grant date
fair value
Shares in
millions
Weighted-
average
grant date
fair value
Nonvested at beginning of year1.3 $176.81 1.4 $150.95 1.5 $132.56 
Granted0.6 206.92 0.6 201.92 0.6 171.48 
Vested(0.4)153.55 (0.6)127.99 (0.6)116.42 
Forfeited(0.2)168.38 (0.1)172.45 (0.1)153.58 
Nonvested at end of year1.3 $197.10 1.3 $176.81 1.4 $150.95