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Long-Term Debt - Long-Term Debt (Detail) - USD ($) $ in Millions | Dec. 31, 2021 | Dec. 31, 2020
--- | --- | ---
Debt Instrument [Line Items] |  |
Total long-term debt | $ 2,539 | $ 2,621
Less current portion | (143) | (795)
Total long-term debt, less current portion | 2,396 | 1,826
0.73% due 2021, floating interest rate at Libor + 0.525% [Member] |  |
Debt Instrument [Line Items] |  |
Funding program loans from European Investment Bank ("EIB") |  | 30
0.75% due 2021, floating interest rate at Libor + 0.572% [Member] |  |
Debt Instrument [Line Items] |  |
Funding program loans from European Investment Bank ("EIB") |  | 29
0.06% due 2028, floating interest rate at Euribor + 0.589% [Member] |  |
Debt Instrument [Line Items] |  |
Funding program loans from European Investment Bank ("EIB") | 202 | 250
0.05% due 2029, floating interest rate at Euribor + 0.564% [Member] |  |
Debt Instrument [Line Items] |  |
Funding program loans from European Investment Bank ("EIB") | 222 | 270
0.15% due 2031, floating interest rate at Euribor + 0.660% [Member] |  |
Debt Instrument [Line Items] |  |
Funding program loans from European Investment Bank ("EIB") | 187 |
0.06% due 2031, floating interest rate at Euribor + 0.583% [Member] |  |
Debt Instrument [Line Items] |  |
Funding program loans from European Investment Bank ("EIB") | 379 |
0.15% due 2027, floating interest rate at Euribor + 0.690% [Member] | Cassa Depositi e Prestiti SpA ("CDP") [Member] |  |
Debt Instrument [Line Items] |  |
Credit Facility | 156 |
0.25% due 2024 (Tranche B) [Member] | Senior Unsecured Convertible Bonds [Member] |  |
Debt Instrument [Line Items] |  |
Senior unsecured convertible bonds |  | 674
Zero-coupon, due 2025 (Tranche A) [Member] | Senior Unsecured Convertible Bonds [Member] |  |
Debt Instrument [Line Items] |  |
Senior unsecured convertible bonds | 713 | 703
Zero-coupon, due 2027 (Tranche B) [Member] | Senior Unsecured Convertible Bonds [Member] |  |
Debt Instrument [Line Items] |  |
Senior unsecured convertible bonds | 674 | 661
0.37% (weighted average), due 2021-2028, fixed interest rate [Member] |  |
Debt Instrument [Line Items] |  |
Other Loans Payable | $ 6 | $ 4

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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://fasb.org/us-gaap/role/ref/legacyRef -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=120391452&loc=d3e13212-122682 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -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=120398452&loc=d3e534808-122878 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -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=120400017&loc=d3e572229-122910 + Details
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