Dow Consolidated Statements of Income Statement - USD ($) shares in Millions, $ in Millions	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Income Statement [Abstract]
Net sales	$ 15,264	$ 11,882
Cost of sales	12,402	10,062
Research and development expenses	218	194
Selling, general and administrative expenses	498	366
Amortization of intangibles	88	101
Restructuring and asset related charges - net	186	0
Equity in earnings of nonconsolidated affiliates	174	224
Sundry income (expense) - net	148	128
Interest income	28	8
Interest expense and amortization of debt discount	167	196
Income before income taxes	2,055	1,323
Provision for income taxes	503	317
Net income	1,552	1,006
Net income (loss) attributable to noncontrolling interests	(17)	15
Net income available for The Dow Chemical Company common stockholder	$ 1,569	$ 991
Earnings per common share - basic	$ 2.12	$ 1.32
Earnings per common share - diluted	$ 2.11	$ 1.32
Weighted-average common shares outstanding - basic	734.6	744.8
Weighted-average common shares outstanding - diluted	739.8	749.8