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Debt and Finance Lease Obligations, Other Debt and Other Disclosures (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2018
Dec. 31, 2019
Principal Payments Due on Debt    
2020 [1]   $ 453
2021   17
2022   6
2023   19
2024   0
Thereafter   8,474
Net unamortized debt issuance costs and other $ (80) (88)
Total debt 8,503 8,881
Line of Credit [Member] | IEnova Revolver [Member] | Central Mexico Terminals [Member]    
Principal Payments Due on Debt    
2020   $ 348
Pure Biofuels del Peru S.A.C (Now Known as Valero Peru S.A.C.) [Member]    
Other Debt (Textual)    
Amount of debt retired $ 137  
[1]
As of December 31, 2019, our debt obligations due in 2020 include $348 million associated with borrowings under the IEnova Revolver.