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Fair Value Measurements (Tables) | 9 Months Ended
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Sep. 30, 2023
Fair Value Disclosures [Abstract] |
Carrying Amount and Fair Values of the Company's Assets and Liabilities Measured on a Recurring Basis | The following table presents the carrying amount and fair values of the Company’s financial assets and liabilities measured on a recurring basis:
|  | September 30, 2023 |  |  | December 31, 2022 |
(in millions) |  | Carrying Amount |  |  | Fair Value |  |  | Carrying Amount |  |  | Fair Value |
Assets |  |  |  |  |  |  |  |  |  |  |  |
Non-derivatives: |  |  |  |  |  |  |  |  |  |  |  |
Cash and cash equivalents |  | $ | 207.2 |  |  | $ | 207.2 |  |  | $ | 147.1 |  |  | $ | 147.1 |
Derivatives (Level 1 measurement): |  |  |  |  |  |  |  |  |  |  |  |
Other current and non-current assets: |  |  |  |  |  |  |  |  |  |  |  |
Foreign currency forward exchange contracts |  |  | 1.0 |  |  |  | 1.0 |  |  |  | — |  |  |  | — |
Emissions Trading Scheme credits |  |  | 3.2 |  |  |  | 3.2 |  |  |  | 2.7 |  |  |  | 2.7 |
Liabilities |  |  |  |  |  |  |  |  |  |  |  |
Derivatives (Level 1 measurement): |  |  |  |  |  |  |  |  |  |  |  |
Other current and non-current liabilities: |  |  |  |  |  |  |  |  |  |  |  |
Foreign currency forward exchange contracts |  |  | — |  |  |  | — |  |  |  | 0.5 |  |  |  | 0.5 |
Non-financial liabilities (Level 3 measurement): |  |  |  |  |  |  |  |  |  |  |  |
Other current and non-current liabilities: |  |  |  |  |  |  |  |  |  |  |  |
Stock equivalent units |  |  | 17.4 |  |  |  | 17.4 |  |  |  | 26.4 |  |  |  | 26.4 |

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- Definition Tabular disclosure of assets and liabilities, including [financial] instruments measured at fair value that are classified in stockholders' equity, if any, that are measured at fair value on a recurring basis. The disclosures contemplated herein include the fair value measurements at the reporting date by the level within the fair value hierarchy in which the fair value measurements in their entirety fall, segregating fair value measurements using quoted prices in active markets for identical assets (Level 1), significant other observable inputs (Level 2), and significant unobservable inputs (Level 3). + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org//1943274/2147482106/820-10-50-2 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org//1943274/2147482106/820-10-50-2 + Details
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