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Leases - Future Payments (Details)
$ in Millions
Dec. 31, 2020
USD ($)
Operating Leases  
2021 $ 141
2022 127
2023 73
2024 59
2025 47
Thereafter 139
Total lease payments 586
Less: Interest 58
Present value of lease liabilities 528
Finance Leases  
2021 12
2022 5
2023 0
2024 0
2025 0
Thereafter 0
Total lease payments 17
Less: Interest 1
Present value of lease liabilities 16
Total  
2021 153
2022 132
2023 73
2024 59
2025 47
Thereafter 139
Total lease payments 603
Less: Interest 59
Present value of lease liabilities $ 544