Guarantor Non-Guarantor Subsidiary Financial Information Level 4 (Details) - Consolidating Statement of Operations - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Net sales	$ 912	$ 952	$ 1,782	$ 1,861
Cost of sales	778	854	1,515	1,656
Gross profit	134	98	267	205
Selling, general and administrative expense	75	82	152	166
Gain (Loss) on Disposition of Business	0	(240)	0	(240)
Business realignment costs	10	42	17	45
Other operating expense (income), net	9	(4)	3	(1)
Operating income	40	218	95	235
Interest expense, net	82	80	165	159
Intercompany interest expense (income)	0	0	0	0
Loss (gain) on extinguishment of debt	0	(21)	3	(44)
Other non-operating income, net	(5)	(3)	(1)	(1)
Loss before income tax and earnings from unconsolidated entities	(37)	162	(72)	121
Income tax (benefit) expense	(1)	17	7	24
Loss before earnings from unconsolidated entities	(36)	145	(79)	97
(Losses) earnings from unconsolidated entities, net of taxes	2	5	3	9
Net loss	(34)	150	(76)	106
Comprehensive income (loss)	(25)	124	(61)	106
Hexion Inc. [Member]
Net sales	417	382	795	763
Cost of sales	355	381	677	755
Gross profit	62	1	118	8
Selling, general and administrative expense	32	40	63	79
Gain (Loss) on Disposition of Business		(188)		(188)
Business realignment costs	6	37	10	38
Other operating expense (income), net	3	2	(3)	4
Operating income	21	110	48	75
Interest expense, net	78	76	158	153
Intercompany interest expense (income)	(18)	(18)	(35)	(37)
Loss (gain) on extinguishment of debt		(21)	(3)	(44)
Other non-operating income, net	(48)	24	(54)	(11)
Loss before income tax and earnings from unconsolidated entities	9	49	(24)	14
Income tax (benefit) expense	2	0	(4)	(4)
Loss before earnings from unconsolidated entities	7	49	(20)	18
(Losses) earnings from unconsolidated entities, net of taxes	(41)	101	(56)	88
Net loss	(34)	150	(76)	106
Comprehensive income (loss)	(25)	124	(61)	106
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 (Loss) on Disposition of Business		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
Loss (gain) on extinguishment of debt		0	0	0
Other non-operating income, 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	(32)	51	(34)	46
Net loss	(32)	51	(34)	46
Comprehensive income (loss)	(31)	52	(34)	46
Combined Non-Guarantor Subsidiaries [Member]
Net sales	550	616	1,093	1,194
Cost of sales	478	519	944	997
Gross profit	72	97	149	197
Selling, general and administrative expense	43	42	89	87
Gain (Loss) on Disposition of Business		(52)		(52)
Business realignment costs	4	5	7	7
Other operating expense (income), net	6	(6)	6	(5)
Operating income	19	108	47	160
Interest expense, net	4	4	7	6
Intercompany interest expense (income)	18	18	35	37
Loss (gain) on extinguishment of debt		0	0	0
Other non-operating income, net	43	(27)	53	10
Loss before income tax and earnings from unconsolidated entities	(46)	113	(48)	107
Income tax (benefit) expense	(3)	17	11	28
Loss before earnings from unconsolidated entities	(43)	96	(59)	79
(Losses) earnings from unconsolidated entities, net of taxes	1	2	2	2
Net loss	(42)	98	(57)	81
Comprehensive income (loss)	(46)	76	(49)	74
Consolidation, Eliminations [Member]
Net sales	(55)	(46)	(106)	(96)
Cost of sales	(55)	(46)	(106)	(96)
Gross profit	0	0	0	0
Selling, general and administrative expense	0	0	0	0
Gain (Loss) on Disposition of Business		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
Loss (gain) on extinguishment of debt		0	0	0
Other non-operating income, 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	74	(149)	91	(127)
Net loss	74	(149)	91	(127)
Comprehensive income (loss)	$ 77	$ (128)	$ 83	$ (120)