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Inventories Inventory Narrative (Details) - USD ($)
$ in Millions
3 Months Ended
Mar. 31, 2022
Mar. 31, 2021
Dec. 31, 2021
Inventory [Line Items]      
Excess of Replacement or Current Costs over Stated LIFO Value $ 112    
Sunoco LP [Member]      
Inventory [Line Items]      
Inventory, LIFO Reserve 0   $ 121
Inventory Write-down $ 120 $ 100