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Leases - Summary of Operating Lease Liabilities Maturity (Details)
$ in Millions
Dec. 31, 2020
USD ($)
Operating Leases, Summary of Aggregate Future Lease Payments After Adoption of 842  
2021 $ 127
2022 122
2023 112
2024 97
2025 70
Thereafter 300
Total undiscounted lease payments 828
Less: imputed interest 113
Total discounted lease payments $ 715