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Long-Term Debt - Additional Information (Detail) $ / shares in Units, € in Millions, $ in Millions |  | 12 Months Ended |  |  |
--- | --- | --- | --- | --- | ---
Jul. 03, 2014 USD ($) $ / shares | Dec. 31, 2015 USD ($) CreditFacility | Dec. 31, 2014 USD ($) | Dec. 31, 2015 EUR (€) | Mar. 31, 2013 EUR (€) | Mar. 12, 2013 USD ($)
Debt Instrument [Line Items] |  |  |  |  |  |
Net proceeds from issuance of senior unsecured convertible bonds |  |  | $ 994 |  |  |
Debt transaction costs | $ 6 |  |  |  |  |
Conversion features of the instruments value |  | $ 0 | 121 |  |  |
Allocated debt issuance costs | 1 |  |  |  |  |
Reduced amount of debt issuance costs |  |  | 4 |  |  |
Unamortized debt discount and issuance costs totalled |  | 95 | 116 |  |  |
Medium Term Credit Facilities [Member] |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Unutilized committed medium term credit facilities |  | 563 |  |  |  |
R & D project in France [Member] |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Line of credit outstanding amount | € |  |  |  | € 245 |  |
Amount outstanding |  | 19 |  |  |  |
Line of credit amount withdrawn |  | 341 |  |  |  |
R & D projects in Italy [Member] |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Line of credit outstanding amount | € |  |  |  | 250 |  |
Amount outstanding |  | 55 |  |  |  |
Line of credit amount withdrawn |  | 380 |  |  |  |
Multi Currency Loan to Support our Industrial and R&D Programs [Member] |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Line of credit outstanding amount | € |  |  |  |  | € 350 |
Amount outstanding |  | $ 353 |  |  |  |
Line of credit amount withdrawn |  |  |  |  |  | $ 471
European Investment Bank [Member] |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Number of long-term amortizing credit facilities | CreditFacility |  | 4 |  |  |  |
Fair Value, Inputs, Level 3 [Member] |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Fair value of liability component | 878 |  |  |  |  |
Europe [Member] | Multi Currency Loan to Support our Industrial and R&D Programs [Member] |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Line of credit outstanding amount | € |  |  |  | 350 |  |
Amount outstanding |  | $ 269 |  |  |  |
Line of credit amount withdrawn |  | $ 321 |  | € 100 |  |
Senior Unsecured Convertible Bonds [Member] |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Net proceeds from issuance of senior unsecured convertible bonds | $ 994 |  |  |  |  |
Senior Unsecured Convertible Bonds [Member] | Carrying Amount [Member] |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Liability component, net of debt discount and issuance costs |  |  | 884 |  |  |
Senior Unsecured Convertible Bonds [Member] | Previously Reported [Member] | Carrying Amount [Member] |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Liability component, net of debt discount and issuance costs |  |  | 888 |  |  |
Zero Coupon due 2019 (Tranche A) [Member] |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Interest rate |  | 1.00% |  | 1.00% |  |
Senior unsecured convertible bonds conversion premium rate | 30.00% |  |  |  |  |
Debt discount rate |  | 2.40% |  |  |  |
Zero Coupon due 2019 (Tranche A) [Member] | Senior Unsecured Convertible Bonds [Member] |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Debt instrument principal amount | $ 600 |  |  |  |  |
Long-term debt maturity date |  | 2019 |  |  |  |
Interest rate | 0.00% | 0.00% |  | 0.00% |  |
Liability component, net of debt discount and issuance costs |  | $ 550 | 537 |  |  |
1.0% due 2021 (Tranche B) [Member] |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Debt instrument periodic payment |  | Semi-annually |  |  |  |
Interest rate |  | 1.00% |  | 1.00% |  |
Senior unsecured convertible bonds conversion premium rate | 31.00% |  |  |  |  |
Debt discount rate |  | 3.22% |  |  |  |
1.0% due 2021 (Tranche B) [Member] | Senior Unsecured Convertible Bonds [Member] |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Debt instrument principal amount | $ 400 |  |  |  |  |
Long-term debt maturity date |  | 2021 |  |  |  |
Interest rate | 1.00% | 1.00% |  | 1.00% |  |
Liability component, net of debt discount and issuance costs |  | $ 354 | $ 347 |  |  |
Dual Tranche Senior Unsecured Convertible Bonds [Member] | Senior Unsecured Convertible Bonds [Member] |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Debt instrument principal amount | $ 1,000 |  |  |  |  |
Senior unsecured convertible bonds conversion price | $ / shares | $ 12 |  |  |  |  |

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- Definition Debt instrument convertible conversion premium percentage. + References No definition available. + Details
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- Definition Number Of Long Term Revolving Credit Facilities + References No definition available. + Details
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- Definition Unamortized Debt Discount And Debt Issuance Costs + References No definition available. + Details
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- Definition Adjustment to additional paid in capital resulting from the recognition of convertible debt instruments as two separate components - a debt component and an equity component. This bifurcation may result in a basis difference associated with the liability component that represents a temporary difference for purposes of applying accounting for income taxes. The initial recognition of deferred taxes for the tax effect of that temporary difference is as an adjustment to additional paid in capital. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 20 -Section 25 -Paragraph 22 -URI http://asc.fasb.org/extlink&oid=51819886&loc=SL6014347-161799 + Details
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- Definition The value of the financial instrument(s) that the original debt is being converted into in a noncash (or part noncash) transaction. "Part noncash" refers to that portion of the transaction not resulting in cash receipts or cash payments in the period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=6367179&loc=d3e4304-108586 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 50 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=6367179&loc=d3e4332-108586 + Details
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- Definition The price per share of the conversion feature embedded in the debt instrument. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 20 -Section 50 -Paragraph 5 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6928298&loc=SL6031898-161870 + Details
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- Definition Description of the frequency of periodic payments (monthly, quarterly, annual). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 470 -Section 50 -Paragraph 3 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=6479336&loc=d3e64711-112823 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.22) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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- Definition Contractual interest rate for funds borrowed, under the debt agreement. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.22(a)(1)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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- Definition Amount of debt issuance costs (for example, but not limited to, legal, accounting, broker, and regulatory fees). + References No definition available. + Details
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- Definition Interest rate used to find the present value of an amount to be paid or received in the future as an input to measure fair value. For example, but not limited to, weighted average cost of capital (WACC), cost of capital, cost of equity and cost of debt. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (bbb) -URI http://asc.fasb.org/extlink&oid=36462937&loc=d3e19207-110258 + Details
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- Definition The carrying value as of the balance sheet date of the current and noncurrent portions of long-term obligations drawn from a line of credit, which is a bank's commitment to make loans up to a specific amount. Examples of items that might be included in the application of this element may consist of letters of credit, standby letters of credit, and revolving credit arrangements, under which borrowings can be made up to a maximum amount as of any point in time conditional on satisfaction of specified terms before, as of and after the date of drawdowns on the line. Includes short-term obligations that would normally be classified as current liabilities but for which (a) postbalance sheet date issuance of a long term obligation to refinance the short term obligation on a long term basis, or (b) the enterprise has entered into a financing agreement that clearly permits the enterprise to refinance the short-term obligation on a long term basis and the following conditions are met (1) the agreement does not expire within 1 year and is not cancelable by the lender except for violation of an objectively determinable provision, (2) no violation exists at the BS date, and (3) the lender has entered into the financing agreement is expected to be financially capable of honoring the agreement. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03.16) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03.16) -URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 19, 20, 22 -Article 5 + Details
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- Definition The fair value amount of long-term debt whether such amount is presented as a separate caption or as a parenthetical disclosure. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. The element may be used in both the balance sheet and disclosure in the same submission. + References No definition available. + Details
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- Definition The cash inflow from the issuance of long-term debt that is not secured by collateral. Excludes proceeds from tax exempt unsecured debt. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Financing Activities -URI http://asc.fasb.org/extlink&oid=6513228 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 14 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=56944662&loc=d3e3255-108585 + Details
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