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Share-based Compensation (Tables)
12 Months Ended
Dec. 31, 2022
Share-based Payment Arrangement [Abstract]  
Share-based Compensation Expense and Effect on Diluted Earnings Per Common Share
Share-based compensation expense and the effect on diluted earnings per common share were as follows:
In millions, except per share data202220212020
Share-based compensation expense$166.7 $139.2 $92.4 
After tax$145.9 $120.4 $78.3 
Earnings per common share-diluted$0.20 $0.16 $0.10 
Weighted Average Assumptions
Weighted-average assumptions
202220212020
Expected dividend yield2.2 %2.4 %2.3 %
Expected stock price volatility21.3 %21.8 %19.1 %
Risk-free interest rate1.9 %0.7 %1.4 %
Expected life of options (in years)
5.75.75.7
Fair value per option granted$42.12 $30.91 $29.40 
Summary of Status and Changes of Stock Option Grants
A summary of the status of the Company’s stock option grants as of December 31, 2022, 2021 and 2020, and changes during the years then ended, is presented in the following table:
202220212020
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 year12.0 $156.13 13.4 $139.44 14.6 $124.21 
Granted1.6 252.97 2.1 215.73 1.8 214.18 
Exercised(1.9)128.08 (2.4)115.29 (2.8)104.58 
Forfeited/expired(0.3)225.93   (1.1)160.50 (0.2)184.69 
Outstanding at end of year11.4 $172.27 5.6$1,041.6 12.0 $156.13 13.4 $139.44 
Exercisable at end of year7.7 $145.87 4.4$904.2 7.8 8.8  
Summary of RSU Activity
A summary of the Company’s RSU activity during the years ended December 31, 2022, 2021 and 2020 is presented in the following table:
 202220212020
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 $197.10 1.3 $176.81 1.4 $150.95 
Granted0.5 242.82 0.6 206.92 0.6 201.92 
Vested(0.4)173.31 (0.4)153.55 (0.6)127.99 
Forfeited(0.2)205.61 (0.2)168.38 (0.1)172.45 
Nonvested at end of year1.2 $222.32 1.3 $197.10 1.3 $176.81