Supplemental Cash Flow Information (Details) - USD ($) $ in Millions		3 Months Ended		6 Months Ended		12 Months Ended
		Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021	Dec. 31, 2021
Decrease (increase) in:
Accounts receivable - trade				$ (1,355)	$ (689)
Accounts receivable - related parties				(8)	(2)
Inventories				(467)	243
Prepaid and other current assets				70	200
Other assets				25	70
Increase (decrease) in:
Accounts payable - trade				(38)	151
Accounts payable - related parties				(35)	(53)
Accrued product payables				2,542	1,246
Accrued interest				(18)	(12)
Other current liabilities				(457)	(726)
Other long-term liabilities				(41)	(29)
Net effect of changes in operating accounts				218	399
Cash payments for interest, net of $38 and $41 capitalized during the six months ended June 30, 2022 and 2021, respectively				624	624
Capitalized interest	[1]	$ 21	$ 21	38	41
Cash payments (refunds) for federal and state income taxes				(3)	$ 17
Liability for construction in progress expenditures				$ 194		$ 183

[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.