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Leases - Additional Information (Detail)
$ in Millions
1 Months Ended
Apr. 30, 2021
USD ($)
ft²
RenewalOption
Jun. 30, 2020
USD ($)
Leases [Line Items]    
Future undiscounted payments $ 129  
Build-to-suit Office Building    
Leases [Line Items]    
Operating remaining lease term   20 years
Future undiscounted payments   $ 67
Operating lease, existence of option to extend   true
Corporate Headquarters Leases    
Leases [Line Items]    
Operating remaining lease term 11 years  
Future undiscounted payments $ 180  
Operating lease, existence of option to extend true  
Number of renewal option | RenewalOption 2  
Operating Lease, renewal term 5 years  
Office space | ft² 300,000  
Maximum | Real Estate    
Leases [Line Items]    
Operating remaining lease term 15 years  
Maximum | Equipment    
Leases [Line Items]    
Operating remaining lease term 4 years  
Maximum | Automobiles    
Leases [Line Items]    
Operating remaining lease term 5 years