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Derivatives Narrative (Details) € in Millions, £ in Millions, $ in Millions | Sep. 30, 2025 USD ($) | Sep. 30, 2025 GBP (£) | Sep. 30, 2025 EUR (€) | Dec. 31, 2024 USD ($) | Dec. 31, 2024 EUR (€)
--- | --- | --- | --- | --- | ---
Foreign Currency Forward & Foreign Currency Option Contracts [Member] |  |  |  |  |
Derivative Instruments and Hedging Activities Disclosures [Line Items] |  |  |  |  |
Derivative, Notional Amount | $ 244.1 |  |  | $ 228.1 |
Foreign Exchange Forward [Member] | Dowlais Group plc |  |  |  |  |
Derivative Instruments and Hedging Activities Disclosures [Line Items] |  |  |  |  |
Derivative, Notional Amount | 767.6 | £ 571.0 |  |  |
Fair Value Hedging |  |  |  |  |
Derivative Instruments and Hedging Activities Disclosures [Line Items] |  |  |  |  |
Derivative, Notional Amount | 205.3 |  | € 175.0 | $ 181.2 | € 175.0
Interest Rate Swaps Through Q3 2027 | Debt [Member] |  |  |  |  |
Derivative Instruments and Hedging Activities Disclosures [Line Items] |  |  |  |  |
Derivative, Notional Amount | 700.0 |  |  |  |
Interest Rate Swap Q3 2027 Through Q4 2029 | Debt [Member] |  |  |  |  |
Derivative Instruments and Hedging Activities Disclosures [Line Items] |  |  |  |  |
Derivative, Notional Amount | $ 200.0 |  |  |  |

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