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Commitments, Contingencies and Other Items - Operating Leases (Details)
$ in Millions
Dec. 31, 2019
USD ($)
Operating leases:  
2020 $ 18
2021 1
2022 1
2023 1
2024 0
2025 and thereafter 8
Total future minimum payments 29
Purchase Obligations  
Total purchase commitments 34
2020 16
2021 & 2022 $ 18