Consolidated Statement of Equity (Deficit) - USD ($) $ in Millions	Total	Common Stock [Member]	Paid-in Capital [Member]	Treasury Stock [Member]	Accumulated Other Comprehensive Income [Member]	Accumulated Deficit [Member]	Total Hexion Inc. Deficit [Member]	Noncontrolling Interest [Member]
Balance at Dec. 31, 2013	$ (2,073)	$ 1	$ 522	$ (296)	$ 130	$ (2,429)	$ (2,072)	$ (1)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	(223)	0	0	0	0	(223)	(223)
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest	(224)
Net Income (Loss) Attributable to Noncontrolling Interest	(1)							(1)
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent		0	0	0		0
Other comprehensive loss	(57)				(57)		(57)	0
Share-based Compensation	1	0	1	0	0	0	1	0
Non-cash distribution declared to parent	3	0	3	0	0	0	3	0
Balance at Dec. 31, 2014	(2,350)	1	526	(296)	73	(2,652)	(2,348)	(2)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	(40)	0	0	0	0	(40)	(40)
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest	(39)
Net Income (Loss) Attributable to Noncontrolling Interest	1							1
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent		0	0	0	(88)	0	(88)	0
Other comprehensive loss	(88)						(88)
Share-based Compensation	1
Balance at Dec. 31, 2015	(2,477)	1	526	(296)	(15)	(2,692)	(2,476)	(1)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	(38)	0	0	0	0	(38)	(38)
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest	(38)
Net Income (Loss) Attributable to Noncontrolling Interest	0							0
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent		0	0	0		0
Other comprehensive loss	(24)				(24)		(24)	0
Share-based Compensation	1
Balance at Dec. 31, 2016	$ (2,539)	$ 1	$ 526	$ (296)	$ (39)	$ (2,730)	$ (2,538)	$ (1)