Defined contribution and defined benefit retirement plans- Schedule of Rollforward of Change in Fair Value of Level 3 Assets (Details) - Pension Plans - USD ($) $ in Millions |
12 Months Ended | |
|---|---|---|
Dec. 31, 2025 |
Dec. 31, 2024 |
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| Schedule Of Reconciliation Of Changes In Fair Value Of Assets And Liabilities [Line Items] | ||
| Fair value at beginning of the year | $ 480.6 | |
| Fair value at end of the year | 464.9 | $ 480.6 |
| Significant unobservable inputs (Level 3) | ||
| Schedule Of Reconciliation Of Changes In Fair Value Of Assets And Liabilities [Line Items] | ||
| Fair value at beginning of the year | 286.0 | 292.1 |
| Gain on assets held at end of year | 13.8 | 12.8 |
| Gain (loss) on assets sold during the year | (6.7) | (0.7) |
| Assets purchased | 1.6 | 1.5 |
| Assets sold | (2.0) | (2.3) |
| Currency exchange rate fluctuations | 36.8 | (17.4) |
| Fair value at end of the year | $ 329.5 | $ 286.0 |
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- Definition Amount of asset segregated and restricted to provide benefit under defined benefit plan. Asset includes, but is not limited to, stock, bond, other investment, earning from investment, and contribution by employer and employee. Reference 1: http://www.xbrl.org/2003/role/exampleRef
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- Definition Amount of purchases of financial instrument classified as an asset measured using unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Amount of sale of financial instrument classified as an asset measured using unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing. Reference 1: http://www.xbrl.org/2003/role/exampleRef
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- Definition Amount of increase (decrease) in asset value due to gain (loss) from foreign currency rate fluctuations for financial instrument classified as an asset measured using unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing. No definition available.
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- Definition Amount of realized gain (loss) for financial instrument sold during the reporting period which was classified as an asset measured using unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing. No definition available.
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- Definition Amount of unrealized gain (loss) for financial instrument held at the measurement date which is classified as an asset measured using unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing. No definition available.
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- Definition Schedule of reconciliation of changes in fair value of assets and liabilities. No definition available.
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