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Financial instruments | 12 Months Ended
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Dec. 31, 2023
Financial instruments |
Financial instruments | Note 16 – Financial instruments: See Note 6 for information on how we determine fair value of our marketable securities. The following table presents the financial instruments that are not carried at fair value but which require fair value disclosure as of December 31, 2022 and 2023. ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | December 31, 2022 |  | December 31, 2023
​ | Carrying | ​ | Fair | ​ | Carrying | ​ | Fair
​ | amount | ​ | value | ​ | amount | ​ | value
​ | (In millions)
Cash, cash equivalents and restricted cash | $ | 334.6 | ​ | $ | 334.6 | ​ | $ | 202.1 | ​ | $ | 202.1
Long-term debt - Fixed rate 3.75% Senior Secured Notes due 2025 |  | 424.1 | ​ |  | 374.2 | ​ |  | 440.9 | ​ |  | 424.5
​ At December 31, 2023, the estimated market price of our 3.75% Senior Secured Notes due 2025 was €959 per €1,000 principal amount. The fair value of our 3.75% Senior Secured Notes due 2025 was based on quoted market prices; however, these quoted market prices represented Level 2 inputs because the markets in which the 3.75% Senior Secured Notes due 2025 trade were not active. Due to their near-term maturities, the carrying amounts of accounts receivable and accounts payable are considered equivalent to fair value. See Notes 3 and 9.

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- Definition The entire disclosure for financial instruments. This disclosure includes, but is not limited to, fair value measurements of short and long term marketable securities, international currencies forward contracts, and auction rate securities. Financial instruments may include hedging and non-hedging currency exchange instruments, derivatives, securitizations and securities available for sale at fair value. Also included are investment results, realized and unrealized gains and losses as well as impairments and risk management disclosures. + References No definition available. + Details
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