Divestitures and Impairments of Businesses (Details) - USD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Goodwill	$ 3,315	$ 3,347	$ 3,374
Assets held for sale	138	0
Liabilities held for sale	181	$ 0
Disposal Group, Held-for-sale, Not Discontinued Operations [Member] | Olmuksan [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Cash and temporary investments	2
Accounts and notes receivable	62
Inventories	18
Other current assets	5
Plants, properties and equipment (net of impairment)	38
Goodwill	6
Deferred charges and other assets	7
Assets held for sale	138
Accounts payable and accrued liabilities	29
Other current liabilities	24
Deferred income taxes	1
Other liabilities	4
Impairment reserve	123
Liabilities held for sale	$ 181