Guarantor Non-Guarantor Subsidiary Financial Information Level 4 (Details) - Consolidating Statement of Operations - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Net sales	$ 952	$ 1,087	$ 1,861	$ 2,166
Cost of sales	854	925	1,656	1,848
Gross profit	98	162	205	318
Selling, general and administrative expense	82	76	166	158
Gain on Disposition of Assets	(240)		(240)
Business realignment costs	42	5	45	8
Other operating expense (income), net	4	(2)	1	(10)
Operating income	218	79	235	142
Interest expense, net	80	84	159	161
Intercompany interest expense (income)	0	0	0	0
Gain on extinguishment of debt	21	0	(44)	0
Other non-operating (income) expense, net	(3)	2	(1)	(1)
Loss before income tax and earnings from unconsolidated entities	162	(7)	121	(18)
Income tax (benefit) expense	17	1	24	27
Loss before earnings from unconsolidated entities	145	(8)	97	(45)
(Losses) earnings from unconsolidated entities, net of taxes	5	6	9	9
Net loss	150	(2)	106	(36)
Comprehensive income (loss)	124	11	106	(85)
Hexion Inc. [Member]
Net sales	382	443	763	908
Cost of sales	381	398	755	803
Gross profit	1	45	8	105
Selling, general and administrative expense	40	25	79	60
Gain on Disposition of Assets	(188)		(188)
Business realignment costs	37	1	38	3
Other operating expense (income), net	2	0	4	4
Operating income	110	19	75	38
Interest expense, net	76	83	153	158
Intercompany interest expense (income)	(18)	(20)	(37)	(40)
Gain on extinguishment of debt	21		44
Other non-operating (income) expense, net	24	(32)	(11)	69
Loss before income tax and earnings from unconsolidated entities	49	(12)	14	(149)
Income tax (benefit) expense	0	3	(4)	(2)
Loss before earnings from unconsolidated entities	49	(15)	18	(147)
(Losses) earnings from unconsolidated entities, net of taxes	101	13	88	111
Net loss	150	(2)	106	(36)
Comprehensive income (loss)	124	11	106	(85)
Combined Subsidiary Guarantors [Member]
Net sales	0	0	0	0
Cost of sales	0	0	0	0
Gross profit	0	0	0	0
Selling, general and administrative expense	0	0	0	0
Gain on Disposition of Assets	0		0
Business realignment costs	0	0	0	0
Other operating expense (income), net	0	0	0	0
Operating income	0	0	0	0
Interest expense, net	0	0	0	0
Intercompany interest expense (income)	0	0	0	0
Gain on extinguishment of debt	0		0
Other non-operating (income) expense, net	0	0	0	0
Loss before income tax and earnings from unconsolidated entities	0	0	0	0
Income tax (benefit) expense	0	0	0	0
Loss before earnings from unconsolidated entities	0	0	0	0
(Losses) earnings from unconsolidated entities, net of taxes	51	4	46	78
Net loss	51	4	46	78
Comprehensive income (loss)	52	5	46	79
Combined Non-Guarantor Subsidiaries [Member]
Net sales	616	692	1,194	1,355
Cost of sales	519	575	997	1,142
Gross profit	97	117	197	213
Selling, general and administrative expense	42	51	87	98
Gain on Disposition of Assets	(52)		(52)
Business realignment costs	5	4	7	5
Other operating expense (income), net	(6)	2	(5)	6
Operating income	108	60	160	104
Interest expense, net	4	1	6	3
Intercompany interest expense (income)	18	20	37	40
Gain on extinguishment of debt	0		0
Other non-operating (income) expense, net	(27)	34	10	(70)
Loss before income tax and earnings from unconsolidated entities	113	5	107	131
Income tax (benefit) expense	17	(2)	28	29
Loss before earnings from unconsolidated entities	96	7	79	102
(Losses) earnings from unconsolidated entities, net of taxes	2	2	2	0
Net loss	98	9	81	102
Comprehensive income (loss)	76	14	74	82
Eliminations [Member]
Net sales	(46)	(48)	(96)	(97)
Cost of sales	(46)	(48)	(96)	(97)
Gross profit	0	0	0	0
Selling, general and administrative expense	0	0	0	0
Gain on Disposition of Assets	0		0
Business realignment costs	0	0	0	0
Other operating expense (income), net	0	0	0	0
Operating income	0	0	0	0
Interest expense, net	0	0	0	0
Intercompany interest expense (income)	0	0	0	0
Gain on extinguishment of debt	0		0
Other non-operating (income) expense, net	0	0	0	0
Loss before income tax and earnings from unconsolidated entities	0	0	0	0
Income tax (benefit) expense	0	0	0	0
Loss before earnings from unconsolidated entities	0	0	0	0
(Losses) earnings from unconsolidated entities, net of taxes	(149)	(13)	(127)	(180)
Net loss	(149)	(13)	(127)	(180)
Comprehensive income (loss)	$ (128)	$ (19)	$ (120)	$ (161)