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Accumulated Other Comprehensive Income (Loss) | 9 Months Ended
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Sep. 30, 2025
Accumulated Other Comprehensive Income (Loss) [Abstract] |
Comprehensive Income (Loss) Note [Text Block] | Accumulated Other Comprehensive Income (Loss) (“AOCI”) The following table sets forth the changes in AOCI, net of tax, by component during the three and nine months ended September 30, 2025 and September 30, 2024:
| Foreign Currency Translation Gain (Loss) |  | Net Actuarial Gain and Prior Service Cost |  | Amortization of Gain on Interest Rate Swap |  | Net Gain (Loss) on Marketable Securities Held in Trust |  | Total
Three Months Ended September 30, 2025 |  |  |  |  |  |  |  |  |
Balance at June 30, 2025 | $ | (2,075.2) |  |  | $ | (22.9) |  |  | $ | 8.0 |  |  | $ | 1.0 |  |  | $ | (2,089.1) |
Other comprehensive income (loss) | (4.8) |  |  | 0.3 |  |  | (0.1) |  |  | 7.5 |  |  | 2.9 |
Tax (expense) benefit | — |  |  | (2.0) |  |  | — |  |  | (1.7) |  |  | (3.7) |
Other comprehensive income (loss), net of tax | (4.8) |  |  | (1.7) |  |  | (0.1) |  |  | 5.8 |  |  | (0.8) |
Other comprehensive income (loss) attributable to noncontrolling interest | (0.7) |  |  | — |  |  | — |  |  | — |  |  | (0.7) |
Balance as of September 30, 2025 | $ | (2,080.7) |  |  | $ | (24.6) |  |  | $ | 7.9 |  |  | $ | 6.8 |  |  | $ | (2,090.6) |
Three Months Ended September 30, 2024 |  |  |  |  |  |  |  |  |
Balance at June 30, 2024 | $ | (2,193.2) |  |  | $ | (31.6) |  |  | $ | 8.1 |  |  | $ | (12.7) |  |  | $ | (2,229.4) |
Other comprehensive income (loss) | 101.6 |  |  | 1.1 |  |  | — |  |  | 17.7 |  |  | 120.4 |
Tax (expense) benefit | 3.0 |  |  | (0.7) |  |  | — |  |  | (4.0) |  |  | (1.7) |
Other comprehensive income (loss), net of tax | 104.6 |  |  | 0.4 |  |  | — |  |  | 13.7 |  |  | 118.7 |
Other comprehensive income (loss) attributable to noncontrolling interest | (0.5) |  |  | — |  |  | — |  |  | — |  |  | (0.5) |
Balance as of September 30, 2024 | $ | (2,089.1) |  |  | $ | (31.2) |  |  | $ | 8.1 |  |  | $ | 1.0 |  |  | $ | (2,111.2) |
Nine Months Ended September 30, 2025 |  |  |  |  |  |  |  |  |
Balance at December 31, 2024 | $ | (2,420.3) |  |  | $ | (22.1) |  |  | $ | 8.0 |  |  | $ | (14.6) |  |  | $ | (2,449.0) |
Other comprehensive income (loss) | 335.3 |  |  | 0.8 |  |  | (0.1) |  |  | 27.8 |  |  | 363.8 |
Tax (expense) benefit | 7.8 |  |  | (3.3) |  |  | — |  |  | (6.4) |  |  | (1.9) |
Other comprehensive income (loss), net of tax | 343.1 |  |  | (2.5) |  |  | (0.1) |  |  | 21.4 |  |  | 361.9 |
Other comprehensive income (loss) attributable to noncontrolling interest | (3.5) |  |  | — |  |  | — |  |  | — |  |  | (3.5) |
Balance as of September 30, 2025 | $ | (2,080.7) |  |  | $ | (24.6) |  |  | $ | 7.9 |  |  | $ | 6.8 |  |  | $ | (2,090.6) |
Nine Months Ended September 30, 2024 |  |  |  |  |  |  |  |  |
Balance at December 31, 2023 | $ | (1,930.2) |  |  | $ | (33.0) |  |  | $ | 8.1 |  |  | $ | 0.2 |  |  | $ | (1,954.9) |
Other comprehensive income (loss) | (159.1) |  |  | 3.2 |  |  | — |  |  | 1.0 |  |  | (154.9) |
Tax (expense) benefit | (2.5) |  |  | (1.4) |  |  | — |  |  | (0.2) |  |  | (4.1) |
Other comprehensive income (loss), net of tax | (161.6) |  |  | 1.8 |  |  | — |  |  | 0.8 |  |  | (159.0) |
Other comprehensive income (loss) attributable to noncontrolling interest | 2.7 |  |  | — |  |  | — |  |  | — |  |  | 2.7 |
Balance as of September 30, 2024 | $ | (2,089.1) |  |  | $ | (31.2) |  |  | $ | 8.1 |  |  | $ | 1.0 |  |  | $ | (2,111.2) |

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- Definition Accumulated Other Comprehensive Income (Loss) [Abstract] + References No definition available. + Details
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- Definition The entire disclosure for comprehensive income, which includes, but is not limited to, 1) the amount of income tax expense or benefit allocated to each component of other comprehensive income, including reclassification adjustments, 2) the reclassification adjustments for each classification of other comprehensive income and 3) the ending accumulated balances for each component of comprehensive income. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 944 -SubTopic 220 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-04(19)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147477250/944-220-S99-1 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 220 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03(21)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147483621/220-10-S99-2 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 942 -SubTopic 220 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-04(23)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147478524/942-220-S99-1 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 220 -Name Accounting Standards Codification -Publisher FASB -URI https://asc.fasb.org/220/tableOfContent + Details
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