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Debt (Tables) | 3 Months Ended
--- | ---
Jun. 30, 2026
Debt Disclosure [Abstract] |
Schedule of Long-term Debt Instruments | The Company’s debt obligations are as follows:
| June 30, |  | March 31,
(Millions of U.S. dollars) | 2026 |  | 2026
Secured debt: |  |  |
5.875% Senior notes due 2031 | $ | 700.0 |  |  | $ | 700.0 |
6.125% Senior notes due 2032 | 1,000.0 |  |  | 1,000.0 |
Revolving Facility 1 | 150.0 |  |  | — |
Term A-1 Facility 1, due 2028 | 750.0 |  |  | 750.0 |
Term A-2 Facility 1, due 2030 | 1,706.3 |  |  | 1,717.2 |
Unsecured debt: |  |  |
5.000% Senior notes due 2028 | — |  |  | 400.0 |
Unamortized debt issuance costs | (29.6) |  |  | (32.2) |
Total debt | 4,276.7 |  |  | 4,535.0 |
Less current portion | (43.8) |  |  | (43.8) |
Total Long-term debt | $ | 4,232.9 |  |  | $ | 4,491.2 |
Weighted average interest rate of total debt | 5.5 | % |  | 5.5 | %
Fair value of Senior unsecured notes (Level 1) | $ | — |  |  | $ | 395.0 |
Fair value of Senior secured notes (Level 1) | $ | 1,706.8 |  |  | $ | 1,685.5 |
____________ 1.As of June 30, 2026, the carrying value of the Company's senior secured credit facilities (the “Credit Facilities”) of $2,606.3 million approximates fair value, as the interest rate is variable and reflects current market rates.

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