Guarantor Non-Guarantor Subsidiary Financial Information Level 4 (Details) - Consolidating Balance Sheets - USD ($) $ in Millions	Jun. 30, 2017	Dec. 31, 2016
Current assets
Cash and cash equivalents (including restricted cash of $0 and $18, respectively)	$ 128	$ 196
Accounts receivable, net	497	390
Intercompany accounts receivable	0	0
Intercompany loans receivable - current portion	0	0
Finished and in-process goods	244	199
Raw materials and supplies	102	88
Other current assets	45	45
Total current assets	1,016	918
Investment in unconsolidated entities	19	18
Deferred income taxes	12	10
Other assets, net	47	43
Intercompany loans receivable	0	0
Property, Plant and Equipment, Net	915	893
Goodwill	125	121
Other intangible assets, net	47	52
Total assets	2,181	2,055
Current liabilities
Accounts and drafts payable	386	368
Intercompany accounts payable	0	0
Debt payable within one year	114	107
Intercompany loans payable within one year	0	0
Interest payable	81	70
Income taxes payable	7	13
Accrued payroll and incentive compensation	31	55
Other current liabilities	133	159
Total current liabilities	752	772
Long-term liabilities
Long-term debt	3,585	3,397
Intercompany loans payable	0	0
Accumulated losses of unconsolidated subsidiaries in excess of investment	0	0
Long-term pension and post employment benefit obligations	258	246
Deferred income taxes	13	13
Other long-term liabilities	173	166
Total liabilities	4,781	4,594
Total Hexion Inc. shareholder’s deficit	(2,599)	(2,538)
Noncontrolling interest	(1)	(1)
Total deficit	(2,600)	(2,539)
Total liabilities and deficit	2,181	2,055
Hexion Inc. [Member]
Current assets
Cash and cash equivalents (including restricted cash of $0 and $18, respectively)	12	28
Accounts receivable, net	126	119
Intercompany accounts receivable	135	106
Intercompany loans receivable - current portion	4	0
Finished and in-process goods	101	82
Raw materials and supplies	39	31
Other current assets	16	26
Total current assets	433	392
Investment in unconsolidated entities	128	93
Deferred income taxes	0	0
Other assets, net	16	17
Intercompany loans receivable	1,075	1,050
Property, Plant and Equipment, Net	436	448
Goodwill	66	65
Other intangible assets, net	37	41
Total assets	2,191	2,106
Current liabilities
Accounts and drafts payable	134	142
Intercompany accounts payable	25	60
Debt payable within one year	0	6
Intercompany loans payable within one year	0	175
Interest payable	78	69
Income taxes payable	6	6
Accrued payroll and incentive compensation	4	28
Other current liabilities	80	110
Total current liabilities	327	596
Long-term liabilities
Long-term debt	3,482	3,378
Intercompany loans payable	254	180
Accumulated losses of unconsolidated subsidiaries in excess of investment	575	339
Long-term pension and post employment benefit obligations	40	42
Deferred income taxes	5	4
Other long-term liabilities	107	105
Total liabilities	4,790	4,644
Total Hexion Inc. shareholder’s deficit	(2,599)	(2,538)
Noncontrolling interest	0	0
Total deficit	(2,599)	(2,538)
Total liabilities and deficit	2,191	2,106
Combined Subsidiary Guarantors [Member]
Current assets
Cash and cash equivalents (including restricted cash of $0 and $18, respectively)	0	0
Accounts receivable, net	2	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	2	1
Investment in unconsolidated entities	13	13
Deferred income taxes	0	0
Other assets, net	6	6
Intercompany loans receivable	0	0
Property, Plant and Equipment, Net	0	0
Goodwill	0	0
Other intangible assets, net	0	0
Total assets	21	20
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	0	0
Accumulated losses of unconsolidated subsidiaries in excess of investment	141	106
Long-term pension and post employment benefit obligations	0	0
Deferred income taxes	0	0
Other long-term liabilities	0	0
Total liabilities	141	106
Total Hexion Inc. shareholder’s deficit	(120)	(86)
Noncontrolling interest	0	0
Total deficit	(120)	(86)
Total liabilities and deficit	21	20
Combined Non-Guarantor Subsidiaries [Member]
Current assets
Cash and cash equivalents (including restricted cash of $0 and $18, respectively)	116	168
Accounts receivable, net	369	270
Intercompany accounts receivable	25	60
Intercompany loans receivable - current portion	0	175
Finished and in-process goods	143	117
Raw materials and supplies	63	57
Other current assets	29	19
Total current assets	745	866
Investment in unconsolidated entities	19	18
Deferred income taxes	12	10
Other assets, net	25	20
Intercompany loans receivable	254	180
Property, Plant and Equipment, Net	479	445
Goodwill	59	56
Other intangible assets, net	10	11
Total assets	1,603	1,606
Current liabilities
Accounts and drafts payable	252	226
Intercompany accounts payable	135	106
Debt payable within one year	114	101
Intercompany loans payable within one year	4	0
Interest payable	3	1
Income taxes payable	1	7
Accrued payroll and incentive compensation	27	27
Other current liabilities	53	49
Total current liabilities	589	517
Long-term liabilities
Long-term debt	103	19
Intercompany loans payable	1,075	1,050
Accumulated losses of unconsolidated subsidiaries in excess of investment	0	0
Long-term pension and post employment benefit obligations	218	204
Deferred income taxes	8	9
Other long-term liabilities	66	61
Total liabilities	2,059	1,860
Total Hexion Inc. shareholder’s deficit	(455)	(253)
Noncontrolling interest	(1)	(1)
Total deficit	(456)	(254)
Total liabilities and deficit	1,603	1,606
Consolidation, Eliminations [Member]
Current assets
Cash and cash equivalents (including restricted cash of $0 and $18, respectively)	0	0
Accounts receivable, net	0	0
Intercompany accounts receivable	(160)	(166)
Intercompany loans receivable - current portion	(4)	(175)
Finished and in-process goods	0	0
Raw materials and supplies	0	0
Other current assets	0	0
Total current assets	(164)	(341)
Investment in unconsolidated entities	(141)	(106)
Deferred income taxes	0	0
Other assets, net	0	0
Intercompany loans receivable	(1,329)	(1,230)
Property, Plant and Equipment, Net	0	0
Goodwill	0	0
Other intangible assets, net	0	0
Total assets	(1,634)	(1,677)
Current liabilities
Accounts and drafts payable	0	0
Intercompany accounts payable	(160)	(166)
Debt payable within one year	0	0
Intercompany loans payable within one year	(4)	(175)
Interest payable	0	0
Income taxes payable	0	0
Accrued payroll and incentive compensation	0	0
Other current liabilities	0	0
Total current liabilities	(164)	(341)
Long-term liabilities
Long-term debt	0	0
Intercompany loans payable	(1,329)	(1,230)
Accumulated losses of unconsolidated subsidiaries in excess of investment	(716)	(445)
Long-term pension and post employment benefit obligations	0	0
Deferred income taxes	0	0
Other long-term liabilities	0	0
Total liabilities	(2,209)	(2,016)
Total Hexion Inc. shareholder’s deficit	575	339
Noncontrolling interest	0	0
Total deficit	575	339
Total liabilities and deficit	$ (1,634)	$ (1,677)