Consolidated Balance Sheets (Parentheticals) - USD ($) $ in Millions	Sep. 30, 2019	Apr. 01, 2019	Dec. 31, 2018
Trade (allowance for doubtful receivables)	$ 49		$ 42
Other investments (investments carried at fair value	1,709		1,699
Other intangible assets (accumulated amortization)	$ 3,748		$ 3,379
Common stock, authorized (in shares)	5,000,000,000		100
Common stock, par value (in dollars per share)	$ 0.01		$ 0.01
Common Stock, Shares, Issued	749,457,637		100
Treasury stock (in shares)	7,961,732		0
Cash and cash equivalents | Variable Interest Entity, Primary Beneficiary [Member]
Cash and cash equivalents (variable interest entities restricted)	$ 36		$ 71
Property, Plant and Equipment [Member] | Variable Interest Entity, Primary Beneficiary [Member]
Variable Interest Entity, Consolidated, Assets, Noncurrent, Pledged	621		683
Long-term debt | Variable Interest Entity, Primary Beneficiary [Member]
Variable interest entities nonrecourse	$ 44		$ 75
The Dow Chemical Company [Domain]
Common stock, authorized (in shares)	100	100	100
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01	$ 0.01
Common Stock, Shares, Issued	100		100
Treasury stock (in shares)	0		0