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Asbestos (Tables) | 3 Months Ended
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Jun. 30, 2026
Asbestos [Abstract] |
Schedule of Net Unfunded AFFA Liability, Net of Tax | The following is a detailed rollforward of the Net Unfunded Amended and Restated Final Funding Agreement (“AFFA”) liability, net of tax, for the three months ended June 30, 2026:
(Millions of U.S. dollars) | Asbestos Liability |  | Insurance Receivables |  | Restricted Cash and Investments |  | Other Assets and Liabilities |  | Net Unfunded AFFA Liability |  | Deferred Tax Assets |  | Income Tax Payable |  | Net Unfunded AFFA Liability, net of tax
Opening Balance - March 31, 2026 | $ | (1,008.6) |  |  | $ | 24.3 |  |  | $ | 268.7 |  |  | $ | 0.2 |  |  | $ | (715.4) |  |  | $ | 282.5 |  |  | $ | 40.2 |  |  | $ | (392.7) |
Asbestos claims paid | 32.8 |  |  | — |  |  | (32.8) |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |
AICF claims-handling costs incurred (paid) | 0.3 |  |  | — |  |  | (0.3) |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |
AICF operating costs paid - non claims-handling | — |  |  | — |  |  | (0.6) |  |  | — |  |  | (0.6) |  |  | — |  |  | — |  |  | (0.6) |
Insurance recoveries | — |  |  | (0.8) |  |  | 0.8 |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |
Movement in income tax payable | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | (6.8) |  |  | (34.8) |  |  | (41.6) |
Other movements | — |  |  | — |  |  | 2.4 |  |  | 0.8 |  |  | 3.2 |  |  | (0.7) |  |  | (0.1) |  |  | 2.4 |
Effect of foreign exchange | (4.7) |  |  | 0.2 |  |  | 1.8 |  |  | — |  |  | (2.7) |  |  | 1.3 |  |  | 1.2 |  |  | (0.2) |
Closing Balance - June 30, 2026 | $ | (980.2) |  |  | $ | 23.7 |  |  | $ | 240.0 |  |  | $ | 1.0 |  |  | $ | (715.5) |  |  | $ | 276.3 |  |  | $ | 6.5 |  |  | $ | (432.7) |
Schedule of Remaining Time Deposits | The following table represents the investments outstanding as of June 30, 2026:
Date Invested |  | Maturity Date |  | Interest Rate |  | A$ Millions
April 2026 |  | April 7, 2027 |  | 5.38% |  | 110.0
January 2026 |  | January 27, 2027 |  | 4.78% |  | 70.0
October 2025 |  | October 16, 2026 |  | 4.14% |  | 70.0
July 2025 |  | July 24, 2026 |  | 4.14% |  | 60.0

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- Definition Asbestos + References No definition available. + Details
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- Definition Schedule of Rollforward of Net Unfunded Amended and Restated Final Funding Agreement Liability [Table Text Block] + References No definition available. + Details
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