Condensed Consolidated Balance Sheets Parenthetical - USD ($) $ in Millions	Sep. 30, 2015	Dec. 31, 2014
Restricted Cash and Cash Equivalents	$ 4	$ 5
Allowance for doubtful accounts	$ 1	$ 1
Common Stock, Par or Stated Value Per Share	$ 0.01	$ 0.01
Common Stock, Shares Authorized	70,000,000	70,000,000
Common Stock, Shares, Issued	48,028,594	47,989,000
Common Stock, Shares, Outstanding	48,028,594	47,989,000
MPM Inc [Member]
Restricted Cash and Cash Equivalents	$ 4	$ 5
Allowance for doubtful accounts	$ 1	$ 1
Common Stock, Par or Stated Value Per Share	$ 0.01	$ 0.01
Common Stock, Shares Authorized	100	100
Common Stock, Shares, Issued	48	48
Common Stock, Shares, Outstanding	48	48