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Stock-Based Compensation - Schedule of Stock Units Activity (Detail)
shares in Millions
 9 Months Ended
Sep. 30, 2023
$ / shares
shares
Dec. 31, 2022
$ / shares
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Abstract]    
Share-based compensation arrangement, award vesting rights three  
Restricted Stock Units (RSUs)    
Share-Based Compensation Arrangement by Share-Based Payment Award, Non-Option Equity Instruments, Outstanding [Roll Forward]    
Outstanding, beginning of period (in units) | shares 3.1  
Granted (in units) | shares 0.2  
Expired (in units) | shares (0.1)  
Vested (in units) | shares (0.1)  
Outstanding, end of period (in units) | shares 3.1  
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Abstract]    
Weighted average grant date fair value, beginning of period (in dollars per unit) | $ / shares $ 107.66 $ 105.65
Weighted average grant date fair value, granted (in dollars per unit) | $ / shares 172.34  
Weighted average grant date fair value, expired (in dollars per unit) | $ / shares 171.52  
Weighted average grant date fair value, vested (in dollars per unit) | $ / shares 170.42  
Weighted average grant date fair value, granted, end of period (in dollars per unit) | $ / shares $ 107.66  
Performance Shares    
Share-Based Compensation Arrangement by Share-Based Payment Award, Non-Option Equity Instruments, Outstanding [Roll Forward]    
Outstanding, beginning of period (in units) | shares 0.3  
Granted (in units) | shares 0.1  
Expired (in units) | shares 0.0  
Vested (in units) | shares (0.1)  
Outstanding, end of period (in units) | shares 0.3  
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Abstract]    
Weighted average grant date fair value, beginning of period (in dollars per unit) | $ / shares $ 190.11 $ 180.04
Weighted average grant date fair value, granted (in dollars per unit) | $ / shares 204.67  
Weighted average grant date fair value, expired (in dollars per unit) | $ / shares 139.73  
Weighted average grant date fair value, vested (in dollars per unit) | $ / shares 179.42  
Weighted average grant date fair value, granted, end of period (in dollars per unit) | $ / shares $ 190.11