XML 176 R159.htm IDEA: XBRL DOCUMENT v3.22.0.1
Share-Based Compensation Plans - Nonvested Restricted Stock Unit Awards (Detail) - Restricted Stock Unit Awards - $ / shares
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
NUMBER    
Beginning Balance (in shares) 2,125,881  
Granted (in shares) 846,433  
Vested (in shares) (944,149)  
Forfeited (in shares) (46,175)  
Ending Balance (in shares) 1,981,990 2,125,881
WEIGHTED AVERAGE GRANT- DATE FAIR VALUE PER UNIT    
Nonvested at beginning of year (in dollars per share) $ 95.61  
Granted (in dollars per share) 99.31  
Vested (in dollars per share) 94.70  
Forfeited (in dollars per share) 98.31  
Nonvested at end of year (in dollars per share) $ 97.56 $ 95.61
WEIGHTED AVERAGE REMAINING VESTING TERM (YEARS)    
WEIGHTED AVERAGE REMAINING VESTING TERM (YEARS) 2 years 3 months 18 days 2 years 1 month 6 days