Dow Consolidated Statements of Income Statement - USD ($) shares in Millions, $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Income Statement [Abstract]
Net sales	$ 15,664	$ 13,885	$ 30,928	$ 25,767
Cost of sales	12,899	10,740	25,301	20,802
Research and development expenses	217	228	435	422
Selling, general and administrative expenses	435	440	933	806
Amortization of intangibles	85	100	173	201
Restructuring and asset related charges - net	0	22	186	22
Equity in earnings of nonconsolidated affiliates	195	278	369	502
Sundry income (expense) - net	75	(3)	223	125
Interest income	36	13	64	21
Interest expense and amortization of debt discount	165	187	332	383
Income before income taxes	2,169	2,456	4,224	3,779
Provision for income taxes	488	524	991	841
Net income	1,681	1,932	3,233	2,938
Net income attributable to noncontrolling interests	20	31	3	46
Net income available for The Dow Chemical Company common stockholder	$ 1,661	$ 1,901	$ 3,230	$ 2,892
Earnings per common share - basic	$ 2.28	$ 2.53	$ 4.40	$ 3.86
Earnings per common share - diluted	$ 2.26	$ 2.51	$ 4.37	$ 3.83
Weighted-average common shares outstanding - basic	725.7	747.0	730.2	745.9
Weighted-average common shares outstanding - diluted	731.5	752.9	735.6	751.4