Supplementary Financial Statement Information (Narrative) (Details) - USD ($)	3 Months Ended	12 Months Ended
Dec. 31, 2021	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Temporary Investments	$ 1,100,000,000	$ 690,000,000	$ 1,100,000,000
Percentage of inventories valued using last-in, first-out inventory method		76.00%
Excess of replacement or current costs over stated LIFO value	195,000,000	$ 282,000,000	195,000,000
Accounts Payable, Other	106,000,000	185,000,000	106,000,000	$ 41,000,000
Depreciation expense		996,000,000	1,100,000,000	1,100,000,000
Interest payments		380,000,000	473,000,000	682,000,000
Current investments	245,000,000	0	245,000,000
Asset retirement obligation	107,000,000	105,000,000	107,000,000
Insurance Recoveries		26,000,000	17,000,000	$ 42,000,000
Accounts Receivable, Allowance for Credit Loss, Current	$ 34,000,000	$ 31,000,000	$ 34,000,000
Percentage of ownership retained	19.90%		19.90%
Building [Member] \| Minimum [Member]
Property, plant and equipment, useful life		20 years
Building [Member] \| Maximum [Member]
Property, plant and equipment, useful life		40 years
Machinery and Equipment [Member] \| Minimum [Member]
Property, plant and equipment, useful life		3 years
Machinery and Equipment [Member] \| Maximum [Member]
Property, plant and equipment, useful life		20 years

Amount of obligations incurred and payable classified as other.

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