Share-Based Compensation - Additional Information (Details) (USD $) In Millions, except Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	May 31, 2013
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Method Used	Share-based compensation expense for stock options granted during 2014, 2013 and 2012 was calculated on the date of grant using the Black-Scholes-Merton option-pricing model
Dividend yield	0.00%
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Weighted Average Grant Date Fair Value	$ 15.68	$ 12.88	$ 10.60
Cash proceeds received from stock option exercises	$ 6	$ 3	$ 1
Stock Option Expense	3	4	5
Restricted Stock Expense	11	9	9
Officer and Board
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expected volatility	53.36%
Expected term (years)	7 years
All Other Employee
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expected volatility	56.91%
Expected term (years)	5 years
Stock Options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expected volatility	53.36%	53.36%	53.86%
Expected term (years)	7 years 2 months 12 days	7 years 2 months 12 days	7 years 6 months
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized	5
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized, Period for Recognition	2 years
Stock Options | Plan 2001
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Description	Stock options under our 2001 Omnibus Equity Incentive Plan (“2001 Plan”) generally vest in equal annual installments over a four-year period and expire ten years after the grant date
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period	4 years
Share-based Compensation Arrangement by Share-based Payment Award, Expiration Period	10 years
Stock Options | Plan 2013
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Description	Stock options under the 2013 Plan generally vest in equal annual installments over a four-year period and expire eight years after the grant date
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period	4 years
Share-based Compensation Arrangement by Share-based Payment Award, Expiration Period	8 years
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized				6,000,000
Restricted Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period	4 years
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized	19
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized, Period for Recognition	3 years
Restricted Stock | Chief Executive Officer
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Deferred compensation arrangement with individual, description	On September 22, 2009, we entered into an employment agreement (the “Agreement”) with Dr. Keh-Shew Lu, President and Chief Executive Officer (the “Employee”), pursuant to which he will continue to be employed by us in such positions for an additional six-year term. As part of the Agreement, we and the Employee entered into a Stock Award Agreement that provides that: (i) we shall grant to the Employee 100,000 shares of Common Stock in the form of restricted stock awards on each of April 14, 2010, 2011, 2012, 2013, 2014 and 2015; (ii) each such installment would vest only if we achieved $1 billion net sales; (iii) upon the termination of the Employee’s employment, our obligation to grant any subsequent installment would terminate; and (iv) any granted shares would be automatically forfeited and returned to us if the Employee’s employment with us is terminated before we achieve the specified target amount of net sales, except in the case of death or disability (as defined) in which case the granted shares would become fully vested on the date of death or disability. The estimated fair value of this grant is approximately $12 million and is being expensed on a straight line basis through April 14, 2015. As of December 31, 2014, five annual installments have been granted and are included in the above table as granted but not vested. As of December 31, 2014, no installments have vested.
Deferred Compensation Arrangement with Individual, Requisite Service Period	6 years
Deferred compensation arrangement with individual shares granted year one on April 14, 2010	100,000
Deferred compensation arrangement with individual shares granted year two on April 14, 2011	100,000
Deferred compensation arrangement with individual shares granted year three on April 14, 2012	100,000
Deferred compensation arrangement with individual shares granted year four on April 14, 2013	100,000
Deferred compensation arrangement with individual shares granted year five on April 14, 2014	100,000
Deferred compensation arrangement with individual shares granted year six on April 14, 2015	100,000
Deferred Compensation Arrangement With Individual Shares Granted Estimated Fair Value	$ 12
Number of annual installments	5