Financial Instruments and Risk Concentration - Additional Information (Details) - Foreign Exchange Forward $ in Millions	Dec. 31, 2015 USD ($)
Valuation and Qualifying Accounts Disclosure [Line Items]
Notional value of forward foreign currency exchange contracts	$ 464
Japanese Yen
Valuation and Qualifying Accounts Disclosure [Line Items]
Notional value of forward foreign currency exchange contracts	175
Euros
Valuation and Qualifying Accounts Disclosure [Line Items]
Notional value of forward foreign currency exchange contracts	$ 139