SEPARATION FROM DOWDUPONT Separation, Distribution and Tax Agreements (Details) - USD ($) $ in Millions	Sep. 30, 2021	Dec. 31, 2020
Other Current Assets [Member]
Indemnification Asset	$ 22	$ 77
Other noncurrent assets
Indemnification Asset	31	33
Accrued and Other Current Liabilities [Member]
Indemnification liability	207	412
Deferred cash contribution	61	103
Other Noncurrent Obligations [Member]
Indemnification liability	40	46
Deferred cash contribution	$ 96	$ 96