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Supplemental Cash Flow Information (Details) - USD ($)
$ in Millions
 3 Months Ended 9 Months Ended 12 Months Ended
Sep. 30, 2024
Sep. 30, 2023
Sep. 30, 2024
Sep. 30, 2023
Dec. 31, 2023
Decrease (increase) in:          
Accounts receivable - trade     $ (426) $ 36  
Accounts receivable - related parties     2 4  
Inventories     32 (766)  
Prepaid and other current assets     (96) (665)  
Other assets     62 31  
Increase (decrease) in:          
Accounts payable - trade     (147) 67  
Accounts payable - related parties     (62) (84)  
Accrued product payables     305 457  
Accrued interest     (185) (189)  
Other current liabilities     52 467  
Other long-term liabilities     (100) (64)  
Net effect of changes in operating accounts     (563) (706)  
Cash payments for interest, net of $82 and $86 capitalized during the nine months ended September 30, 2024, and 2023, respectively     1,180 1,123  
Capitalized interest [1] $ 31 $ 17 82 86  
Cash payments for federal and state income taxes     19 $ 22  
Liability for construction in progress expenditures     $ 491   $ 400
[1] We capitalize interest costs incurred on funds used to construct property, plant and equipment while the asset is in its construction phase.  The capitalized interest is recorded as part of the asset to which it relates and is amortized over the asset’s estimated useful life as a component of depreciation expense.  When capitalized interest is recorded, it reduces interest expense from what it would be otherwise.