Supplementary Financial Statement Information (Narrative) (Details) - USD ($) $ in Millions	12 Months Ended
Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Temporary Investments	$ 1,100	$ 294
Percentage of inventories valued using last-in, first-out inventory method	80.00%
Excess of replacement or current costs over stated LIFO value	$ 195	183
Accounts Payable, Other	106	41	$ 164
Depreciation expense	1,100	1,100	1,000
Interest payments	473	682	$ 748
Current investments	245	0
Asset retirement obligation	107	94
Insurance Recoveries	17	42
Accounts Receivable, Allowance for Credit Loss, Current	$ 34	$ 44
Percentage of ownership retained	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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