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Leases - Schedule of Maturities of Non-Cancelable Operating Lease Liabilities (Detail) - USD ($)
$ in Millions
Dec. 31, 2020
Dec. 31, 2019
Leases [Abstract]    
2021 $ 30  
2022 29  
2023 24  
2024 24  
2025 24  
Thereafter 341  
Total minimum rent payments 472  
Less: imputed interest 228  
Total operating lease liabilities $ 244 $ 260