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Leases - Additional Information (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Jul. 31, 2020
Lessee, Lease, Description [Line Items]      
Short-term lease expense $ 8 $ 8  
Minimum      
Lessee, Lease, Description [Line Items]      
Renewal term 1 year    
Financing lease not yet commenced, amount expected to be capitalized at commencement     $ 20
Maximum      
Lessee, Lease, Description [Line Items]      
Renewal term 20 years    
Financing lease not yet commenced, amount expected to be capitalized at commencement     $ 25