Supplemental Cash Flow Information (Details) - USD ($) $ in Millions		3 Months Ended		6 Months Ended		12 Months Ended
		Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023	Dec. 31, 2023
Decrease (increase) in:
Accounts receivable - trade				$ (867)	$ 835
Accounts receivable - related parties				(3)	2
Inventories				(11)	62
Prepaid and other current assets				(110)	(167)
Other assets				3	10
Increase (decrease) in:
Accounts payable - trade				(201)	86
Accounts payable - related parties				(90)	(141)
Accrued product payables				943	(989)
Accrued interest				32	31
Other current liabilities				(143)	(86)
Other long-term liabilities				(80)	(46)
Net effect of changes in operating accounts				(527)	(403)
Cash payments for interest, net of $51 and $69 capitalized during the six months ended June 30, 2024, and 2023, respectively				623	576
Capitalized interest	[1]	$ 26	$ 37	51	69
Cash payments for federal and state income taxes				19	$ 12
Liability for construction in progress expenditures				$ 498		$ 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.