Guarantor Non-Guarantor Subsidiary Financial Information Level 4 (Details) - Consolidating Balance Sheets - USD ($) $ in Millions	Sep. 30, 2016	Dec. 31, 2015
Current assets
Cash and cash equivalents (including restricted cash of $0 and $19, respectively)	$ 145	$ 236
Accounts receivable, net	498	450
Intercompany accounts receivable	0	0
Intercompany loans receivable - current portion	0	0
Finished and in-process goods	221	218
Raw materials and supplies	98	90
Other current assets	80	53
Total current assets	1,042	1,047
Investment in unconsolidated entities	17	36
Deferred income taxes	10	13
Other assets, net	43	48
Intercompany loans receivable	0	0
Property, Plant and Equipment, Net	892	1,051
Goodwill	124	122
Other intangible assets, net	56	65
Total assets	2,184	2,382
Current liabilities
Accounts and drafts payable	311	386
Intercompany accounts payable	0	0
Debt payable within one year	69	80
Intercompany loans payable within one year	0	0
Interest payable	96	82
Income taxes payable	24	15
Accrued payroll and incentive compensation	58	78
Other current liabilities	160	123
Total current liabilities	718	764
Long-term liabilities
Long-term debt	3,475	3,698
Intercompany loans payable	0	0
Accumulated losses of unconsolidated subsidiaries in excess of investment	0	0
Long-term pension and post employment benefit obligations	224	224
Deferred income taxes	14	12
Other long-term liabilities	164	161
Due to Affiliate	0
Total liabilities	4,595	4,859
Total Hexion Inc. shareholder’s deficit	(2,410)	(2,476)
Noncontrolling interest	(1)	(1)
Total deficit	(2,411)	(2,477)
Total liabilities and deficit	2,184	2,382
Hexion Inc. [Member]
Current assets
Cash and cash equivalents (including restricted cash of $0 and $19, respectively)	49	62
Accounts receivable, net	140	115
Intercompany accounts receivable	115	132
Intercompany loans receivable - current portion	27	0
Finished and in-process goods	90	97
Raw materials and supplies	35	34
Other current assets	42	29
Total current assets	498	469
Investment in unconsolidated entities	79	117
Deferred income taxes	0	0
Other assets, net	15	21
Intercompany loans receivable	1,080	1,269
Property, Plant and Equipment, Net	444	559
Goodwill	66	65
Other intangible assets, net	43	49
Total assets	2,225	2,549
Current liabilities
Accounts and drafts payable	106	148
Intercompany accounts payable	38	154
Debt payable within one year	8	6
Intercompany loans payable within one year	144	174
Interest payable	95	80
Income taxes payable	22	7
Accrued payroll and incentive compensation	23	43
Other current liabilities	104	73
Total current liabilities	540	685
Long-term liabilities
Long-term debt	3,430	3,656
Intercompany loans payable	210	93
Accumulated losses of unconsolidated subsidiaries in excess of investment	313	429
Long-term pension and post employment benefit obligations	41	45
Deferred income taxes	(3)	6
Other long-term liabilities	104	111
Due to Affiliate	0
Total liabilities	4,635	5,025
Total Hexion Inc. shareholder’s deficit	(2,410)	(2,476)
Noncontrolling interest	0	0
Total deficit	(2,410)	(2,476)
Total liabilities and deficit	2,225	2,549
Combined Subsidiary Guarantors [Member]
Current assets
Cash and cash equivalents (including restricted cash of $0 and $19, respectively)	0	0
Accounts receivable, net	1	1
Intercompany accounts receivable	0	0
Intercompany loans receivable - current portion	0	0
Finished and in-process goods	0	0
Raw materials and supplies	0	0
Other current assets	0	0
Total current assets	1	1
Investment in unconsolidated entities	6	28
Deferred income taxes	0	0
Other assets, net	6	6
Intercompany loans receivable	0	6
Property, Plant and Equipment, Net	0	0
Goodwill	0	0
Other intangible assets, net	0	0
Total assets	13	41
Current liabilities
Accounts and drafts payable	0	0
Intercompany accounts payable	0	0
Debt payable within one year	0	0
Intercompany loans payable within one year	0	0
Interest payable	0	0
Income taxes payable	0	0
Accrued payroll and incentive compensation	0	0
Other current liabilities	0	0
Total current liabilities	0	0
Long-term liabilities
Long-term debt	0	0
Intercompany loans payable	6	6
Accumulated losses of unconsolidated subsidiaries in excess of investment	86	130
Long-term pension and post employment benefit obligations	0	0
Deferred income taxes	0	0
Other long-term liabilities	0	0
Due to Affiliate	0
Total liabilities	92	136
Total Hexion Inc. shareholder’s deficit	(79)	(95)
Noncontrolling interest	0	0
Total deficit	(79)	(95)
Total liabilities and deficit	13	41
Combined Non-Guarantor Subsidiaries [Member]
Current assets
Cash and cash equivalents (including restricted cash of $0 and $19, respectively)	96	174
Accounts receivable, net	357	334
Intercompany accounts receivable	38	154
Intercompany loans receivable - current portion	144	174
Finished and in-process goods	131	121
Raw materials and supplies	63	56
Other current assets	38	24
Total current assets	867	1,037
Investment in unconsolidated entities	18	21
Deferred income taxes	10	13
Other assets, net	22	21
Intercompany loans receivable	214	108
Property, Plant and Equipment, Net	448	492
Goodwill	58	57
Other intangible assets, net	13	16
Total assets	1,650	1,765
Current liabilities
Accounts and drafts payable	205	238
Intercompany accounts payable	115	132
Debt payable within one year	61	74
Intercompany loans payable within one year	27	0
Interest payable	1	2
Income taxes payable	2	8
Accrued payroll and incentive compensation	35	35
Other current liabilities	56	50
Total current liabilities	502	539
Long-term liabilities
Long-term debt	45	42
Intercompany loans payable	1,078	1,284
Accumulated losses of unconsolidated subsidiaries in excess of investment	0	0
Long-term pension and post employment benefit obligations	183	179
Deferred income taxes	17	6
Other long-term liabilities	60	50
Due to Affiliate	0
Total liabilities	1,885	2,100
Total Hexion Inc. shareholder’s deficit	(234)	(334)
Noncontrolling interest	(1)	(1)
Total deficit	(235)	(335)
Total liabilities and deficit	1,650	1,765
Consolidation, Eliminations [Member]
Current assets
Cash and cash equivalents (including restricted cash of $0 and $19, respectively)	0	0
Accounts receivable, net	0	0
Intercompany accounts receivable	(153)	(286)
Intercompany loans receivable - current portion	(171)	(174)
Finished and in-process goods	0	0
Raw materials and supplies	0	0
Other current assets	0	0
Total current assets	(324)	(460)
Investment in unconsolidated entities	(86)	(130)
Deferred income taxes	0	0
Other assets, net	0	0
Intercompany loans receivable	(1,294)	(1,383)
Property, Plant and Equipment, Net	0	0
Goodwill	0	0
Other intangible assets, net	0	0
Total assets	(1,704)	(1,973)
Current liabilities
Accounts and drafts payable	0	0
Intercompany accounts payable	(153)	(286)
Debt payable within one year	0	0
Intercompany loans payable within one year	(171)	(174)
Interest payable	0	0
Income taxes payable	0	0
Accrued payroll and incentive compensation	0	0
Other current liabilities	0	0
Total current liabilities	(324)	(460)
Long-term liabilities
Long-term debt	0	0
Intercompany loans payable	(1,294)	(1,383)
Accumulated losses of unconsolidated subsidiaries in excess of investment	(399)	(559)
Long-term pension and post employment benefit obligations	0	0
Deferred income taxes	0	0
Other long-term liabilities	0	0
Due to Affiliate	0
Total liabilities	(2,017)	(2,402)
Total Hexion Inc. shareholder’s deficit	313	429
Noncontrolling interest	0	0
Total deficit	313	429
Total liabilities and deficit	$ (1,704)	$ (1,973)