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Stockholders' Equity - Narrative (Detail) - USD ($)
3 Months Ended
Mar. 31, 2022
Mar. 31, 2021
Oct. 31, 2020
Restricted stock units      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Restricted stock units, approved (in shares) 750,583    
Weighted-average grant date fair value (in dollars per share) $ 665.53    
Requisite service period (in years) 3 years 6 months    
2020 ATM Program      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Sale of stock, equity offering agreement, authorized     $ 1,500,000,000
Issuance of common stock in offering (in shares)   0  
Equity Forward Amendment under the 2020 ATM Program      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Sale of stock, equity offering agreement, available for sale $ 1,000,000,000