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Leases (Components of Net Investment in Finance Leases) (Details)
$ in Millions
Dec. 31, 2021
USD ($)
Leases [Abstract]  
2022 $ 23
2023 22
2024 22
2025 21
2026 21
2027 and thereafter 271
Total minimum future lease receipts 380
Residual value of leased pipeline 17
Less unearned income 198
Net investment in finance lease 199
Less current portion 6
Net investment in finance lease, noncurrent $ 193