Related Party Transactions (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017	Dec. 31, 2017
Apollo Affiliates and Other Related Parties [Member]
Related Party Transaction [Line Items]
Revenue from Related Parties	$ 1	$ 1	$ 2	$ 3
Accounts Receivable, Related Parties	1		1		$ 1
Apollo [Member]
Related Party Transaction [Line Items]
Annual management consulting fee			$ 3	$ 3
Annual management consulting fee percentage			2.00%	2.00%
Related Party Costs	1	1	$ 2	$ 2
Subsidiary of Common Parent [Member]
Related Party Transaction [Line Items]
Shared Services Costs Incurred by MPM			17	31
Momentive Performance Materials Inc. [Member]
Related Party Transaction [Line Items]
Accounts Receivable shared services costs	1		1		3
Revenue from Related Parties	0	1	1	1
Related Party Transaction, Purchases from Related Party	9	6	25	18
Revenues from distribution agreement	1	1	1	1
Accounts Receivable, Related Parties	0		0		0
Accounts Payable, Related Parties	3		3		2
Other joint ventures unconsolidated [Member]
Related Party Transaction [Line Items]
Revenue from Related Parties	1	1	7	9
Accounts Receivable, Related Parties	3		3		6
Accounts Payable, Related Parties	1		1		1
Purchases from JV	1	$ 3	5	10
Russian Joint Venture [Member]
Related Party Transaction [Line Items]
Loans and Leases Receivable, Related Parties	$ 7		7		$ 6
Hexion Inc. [Member]
Related Party Transaction [Line Items]
Shared Services Costs Incurred by Hexion			23	41
Shared Services Net Billings - Hexion to MPM			$ 11	$ 21