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Leases - Schedule of Future Minimum Operating Lease Payments (Details) - USD ($)
$ in Millions
Mar. 31, 2021
Dec. 31, 2020
Fiscal years:    
Remaining 2021 $ 115  
2022 135  
2023 120  
2024 107  
2025 95  
Thereafter 273  
Total 845  
Less: present value discount (74)  
Lease liability $ 771 $ 786