Guarantor Non-Guarantor Subsidiary Financial Information Level 4 (Details) - Consolidating Balance Sheets - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2016	Dec. 31, 2015
Current assets
Cash and cash equivalents (including restricted cash of $0 and $11, respectively)	$ 119	$ 236
Accounts receivable, net	508	450
Intercompany accounts receivable	0	0
Intercompany loans receivable - current portion	0	0
Finished and in-process goods	229	218
Raw materials and supplies	89	90
Current assets held for sale	67
Other current assets	53	53
Total current assets	1,065	1,047
Investment in unconsolidated entities	37	36
Deferred income taxes	11	13
Long-term assets held for sale	80
Other assets, net	46	48
Intercompany loans receivable	0	0
Property, Plant and Equipment, Net	944	1,051
Goodwill	125	122
Other intangible assets, net	62	65
Total assets	2,370	2,382
Current liabilities
Accounts and drafts payable	319	386
Intercompany accounts payable	0	0
Debt payable within one year	66	80
Intercompany loans payable within one year	0	0
Interest payable	99	82
Income taxes payable	10	15
Accrued payroll and incentive compensation	99	78
Current liabilities associated with assets held for sale	56
Other current liabilities	110	123
Total current liabilities	759	764
Long-term liabilities
Long-term debt	3,700	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	227	224
Deferred income taxes	13	12
Long-term liabilities associated with assets held for sale	10
Other long-term liabilities	156	161
Total liabilities	4,865	4,859
Total Hexion Inc. shareholder’s deficit	(2,494)	(2,476)
Noncontrolling interest	(1)	(1)
Total deficit	(2,495)	(2,477)
Total liabilities and deficit	2,370	2,382
Hexion Inc. [Member]
Current assets
Cash and cash equivalents (including restricted cash of $0 and $11, respectively)	20	62
Accounts receivable, net	133	115
Intercompany accounts receivable	159	132
Intercompany loans receivable - current portion	0	0
Finished and in-process goods	105	97
Raw materials and supplies	35	34
Current assets held for sale	10
Other current assets	14	29
Total current assets	476	469
Investment in unconsolidated entities	127	117
Deferred income taxes	2	0
Long-term assets held for sale	6
Other assets, net	19	21
Intercompany loans receivable	1,165	1,269
Property, Plant and Equipment, Net	503	559
Goodwill	66	65
Other intangible assets, net	47	49
Total assets	2,411	2,549
Current liabilities
Accounts and drafts payable	112	148
Intercompany accounts payable	44	154
Debt payable within one year	3	6
Intercompany loans payable within one year	63	174
Interest payable	98	80
Income taxes payable	10	7
Accrued payroll and incentive compensation	55	43
Current liabilities associated with assets held for sale	6
Other current liabilities	70	73
Total current liabilities	461	685
Long-term liabilities
Long-term debt	3,661	3,656
Intercompany loans payable	208	93
Accumulated losses of unconsolidated subsidiaries in excess of investment	427	429
Long-term pension and post employment benefit obligations	43	45
Deferred income taxes	(2)	6
Long-term liabilities associated with assets held for sale	0
Other long-term liabilities	107	111
Total liabilities	4,905	5,025
Total Hexion Inc. shareholder’s deficit	(2,494)	(2,476)
Noncontrolling interest	0	0
Total deficit	(2,494)	(2,476)
Total liabilities and deficit	2,411	2,549
Combined Subsidiary Guarantors [Member]
Current assets
Cash and cash equivalents (including restricted cash of $0 and $11, 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
Current assets held for sale	0
Other current assets	0	0
Total current assets	1	1
Investment in unconsolidated entities	29	28
Deferred income taxes	0	0
Long-term assets held for sale	0
Other assets, net	6	6
Intercompany loans receivable	6	6
Property, Plant and Equipment, Net	0	0
Goodwill	0	0
Other intangible assets, net	0	0
Total assets	42	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
Current liabilities associated with assets held for sale	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	141	130
Long-term pension and post employment benefit obligations	0	0
Deferred income taxes	0	0
Long-term liabilities associated with assets held for sale	0
Other long-term liabilities	0	0
Total liabilities	147	136
Total Hexion Inc. shareholder’s deficit	(105)	(95)
Noncontrolling interest	0	0
Total deficit	(105)	(95)
Total liabilities and deficit	42	41
Combined Non-Guarantor Subsidiaries [Member]
Current assets
Cash and cash equivalents (including restricted cash of $0 and $11, respectively)	99	174
Accounts receivable, net	374	334
Intercompany accounts receivable	44	154
Intercompany loans receivable - current portion	63	174
Finished and in-process goods	124	121
Raw materials and supplies	54	56
Current assets held for sale	57
Other current assets	39	24
Total current assets	854	1,037
Investment in unconsolidated entities	22	21
Deferred income taxes	9	13
Long-term assets held for sale	74
Other assets, net	21	21
Intercompany loans receivable	214	108
Property, Plant and Equipment, Net	441	492
Goodwill	59	57
Other intangible assets, net	15	16
Total assets	1,709	1,765
Current liabilities
Accounts and drafts payable	207	238
Intercompany accounts payable	159	132
Debt payable within one year	63	74
Intercompany loans payable within one year	0	0
Interest payable	1	2
Income taxes payable	0	8
Accrued payroll and incentive compensation	44	35
Current liabilities associated with assets held for sale	50
Other current liabilities	40	50
Total current liabilities	564	539
Long-term liabilities
Long-term debt	39	42
Intercompany loans payable	1,171	1,284
Accumulated losses of unconsolidated subsidiaries in excess of investment	0	0
Long-term pension and post employment benefit obligations	184	179
Deferred income taxes	15	6
Long-term liabilities associated with assets held for sale	10
Other long-term liabilities	49	50
Total liabilities	2,032	2,100
Total Hexion Inc. shareholder’s deficit	(322)	(334)
Noncontrolling interest	(1)	(1)
Total deficit	(323)	(335)
Total liabilities and deficit	1,709	1,765
Eliminations [Member]
Current assets
Cash and cash equivalents (including restricted cash of $0 and $11, respectively)	0	0
Accounts receivable, net	0	0
Intercompany accounts receivable	(203)	(286)
Intercompany loans receivable - current portion	(63)	(174)
Finished and in-process goods	0	0
Raw materials and supplies	0	0
Current assets held for sale	0
Other current assets	0	0
Total current assets	(266)	(460)
Investment in unconsolidated entities	(141)	(130)
Deferred income taxes	0	0
Long-term assets held for sale	0
Other assets, net	0	0
Intercompany loans receivable	(1,385)	(1,383)
Property, Plant and Equipment, Net	0	0
Goodwill	0	0
Other intangible assets, net	0	0
Total assets	(1,792)	(1,973)
Current liabilities
Accounts and drafts payable	0	0
Intercompany accounts payable	(203)	(286)
Debt payable within one year	0	0
Intercompany loans payable within one year	(63)	(174)
Interest payable	0	0
Income taxes payable	0	0
Accrued payroll and incentive compensation	0	0
Current liabilities associated with assets held for sale	0
Other current liabilities	0	0
Total current liabilities	(266)	(460)
Long-term liabilities
Long-term debt	0	0
Intercompany loans payable	(1,385)	(1,383)
Accumulated losses of unconsolidated subsidiaries in excess of investment	(568)	(559)
Long-term pension and post employment benefit obligations	0	0
Deferred income taxes	0	0
Long-term liabilities associated with assets held for sale	0
Other long-term liabilities	0	0
Total liabilities	(2,219)	(2,402)
Total Hexion Inc. shareholder’s deficit	427	429
Noncontrolling interest	0	0
Total deficit	427	429
Total liabilities and deficit	$ (1,792)	$ (1,973)