Consolidated Statements of Income - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Income Statement [Abstract]
Net sales	$ 13,582	$ 14,899
Cost of sales	10,707	11,552
Research and development expenses	361	386
Selling, general and administrative expenses	701	751
Amortization of intangibles	154	159
Restructuring and asset related charges - net	232	165
Integration and separation costs	408	202
Equity in earnings of nonconsolidated affiliates	13	243
Sundry income (expense) - net	73	83
Interest expense and amortization of debt discount	247	270
Income before income taxes	858	1,740
Provision for income taxes	272	363
Net income	586	1,377
Net income attributable to noncontrolling interests	45	35
Net income available for The Dow Chemical Company common stockholder	541	1,342
Depreciation	598	621
Capital expenditures	$ 514	$ 423