Stock Option Plans and Stock Based Compensation Level 4 (Details) - Stock Option Activity (USD $)
12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
Stock Option Plan Activity [Line Items]      
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Weighted Average Remaining Contractual Term 6 years 1 month    
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]      
Options outstanding at December 31, 2013 12,079,671    
Options granted 247,560    
Options forfeited (1,301,723)    
Options outstanding at December 31, 2014 11,025,508    
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Number 6,373,601    
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding, Number 1,880,442    
Weighted Average Exercise Price of Options Outstanding at December 31, 2010 $ 3.87 $ 4.08  
Weighted Average Exercise Price of Options granted $ 1    
Weighted Average Exercise Price of Options forfeited $ 4.14    
Weighted Average Exercise Price of Exercisable options at December 31, 2011 $ 3.98    
Weighted Average Exercise Price of options expected to vest at December 31, 2011 $ 1.51    
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Remaining Contractual Term 6 years 0 months    
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding, Weighted Average Remaining Contractual Term 8 years 8 months    
Aggregate Intrinsic Value of Options Exercisable and Options Exercised $ 0    
Minimum [Member]      
Stock Option Plan Activity [Line Items]      
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Lower Range Limit $ 1.21    
Maximum [Member]      
Stock Option Plan Activity [Line Items]      
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Lower Range Limit $ 29.42    
Maximum [Member]      
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]      
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period, Total Intrinsic Value   0  
Momentive Performance Materials Holdings LLC 2011 Equity Incentive Plan - Tranche A Options [Member]      
Stock Option Plan Activity [Line Items]      
Aggregate Grant Date Fair Value $ 2,000,000   $ 6,000,000