STOCKHOLDERS' EQUITY (Shares of Dow Common Stock) (Details) - $ / shares	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017	Apr. 01, 2019
Schedule of Common Stock and Treasury Stock Outstanding Roll Forward [Line Items]
Common Stock, Shares Authorized	5,000,000,000	100
Common Stock, Par or Stated Value Per Share	$ 0.01	$ 0.01
Issued (in shares)	2,457,404	100
Impact of recapitalization	748,771,140
Treasury Stock Reissued	0	0	14,194,282
Issued
Schedule of Common Stock and Treasury Stock Outstanding Roll Forward [Line Items]
Shares, Outstanding	751,228,644	100	0
Held in Treasury
Schedule of Common Stock and Treasury Stock Outstanding Roll Forward [Line Items]
Shares, Outstanding	9,729,834	0	0
Repurchased	9,729,834
Dow Inc. [Member]
Schedule of Common Stock and Treasury Stock Outstanding Roll Forward [Line Items]
Common Stock, Shares Authorized		100		5,000,000,000
Common Stock, Par or Stated Value Per Share		$ 0.01		$ 0.01