Consolidated Statements of Comprehensive Loss - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Net Income	$ 595	$ 4,404	$ 7,783
Other Comprehensive Income (Loss), Net of Tax
Unrealized losses on investments	(46)	(4)	(94)
Cumulative translation adjustments	900	(644)	(986)
Pension and other postretirement benefit plans	391	(620)	552
Derivative instruments	(14)	113	(122)
Total other comprehensive income (loss)	1,231	(1,155)	(650)
Comprehensive Income	1,826	3,249	7,133
Comprehensive income attributable to noncontrolling interests, net of tax	172	83	65
Comprehensive Income Attributable to The Dow Chemical Company	$ 1,654	$ 3,166	$ 7,068