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Debt (Tables) | 3 Months Ended
--- | ---
Mar. 31, 2024
Debt Disclosure [Abstract] |
Schedule of debt outstanding | The following table presents White Mountains’s debt outstanding as of March 31, 2024 and December 31, 2023:
$ in Millions |  | March 31, 2024 |  | Effective Rate | (1) | December 31, 2023 |  | Effective Rate | (1)
Ark 2007 Subordinated Notes, carrying value |  | $ | — |  |  |  |  | $ | 30.0 |  |  |  |
Ark 2021 Subordinated Notes Tranche 1 |  | 42.4 |  |  |  |  | 42.7 |  |  |  |
Ark 2021 Subordinated Notes Tranche 2 |  | 47.0 |  |  |  |  | 47.0 |  |  |  |
Ark 2021 Subordinated Notes Tranche 3 |  | 70.0 |  |  |  |  | 70.0 |  |  |  |
Unamortized issuance cost |  | (4.0) |  |  |  |  | (4.2) |  |  |  |
Ark 2021 Subordinated Notes, carrying value |  | 155.4 |  |  |  |  | 155.5 |  |  |  |
Total Ark Subordinated Notes, carrying value |  | 155.4 |  |  | 13.1% |  | 185.5 |  |  | 11.0% |
HG Global Senior Notes (2) |  | 150.0 |  |  | 11.9% |  | 150.0 |  |  | 11.9% |
Unamortized discount and issuance cost |  | (3.0) |  |  |  |  | (3.1) |  |  |  |
HG Global Senior Notes, carrying value |  | 147.0 |  |  |  |  | 146.9 |  |  |  |
Kudu Credit Facility |  | 210.3 |  |  | 10.6% |  | 210.3 |  |  | 10.1% |
Unamortized issuance cost |  | (6.5) |  |  |  |  | (6.5) |  |  |  |
Kudu Credit Facility, carrying value |  | 203.8 |  |  |  |  | 203.8 |  |  |  |
Other Operations debt |  | 26.4 |  |  | 10.2% |  | 28.9 |  |  | 10.2% |
Unamortized issuance cost |  | (.5) |  |  |  |  | (.5) |  |  |  |
Other Operations debt, carrying value |  | 25.9 |  |  |  |  | 28.4 |  |  |  |
Total debt |  | $ | 532.1 |  |  |  |  | $ | 534.6 |  |  |  |
(1) Effective rate includes the effect of the amortization of debt issuance costs and, where applicable, the original issue discount. (2) Effective rate excludes the effect of the interest rate cap. The following table presents the change in debt under the Kudu Credit Facility for the three months ended March 31, 2024 and 2023:
|  |  |  | Three Months Ended March 31,
Millions |  |  |  |  |  | 2024 |  | 2023
Kudu Credit Facility |  |  |  |  |  |  |  |
Beginning balance |  |  |  |  |  | $ | 210.3 |  |  | $ | 215.2 |
Term loans |  |  |  |  |  |  |  |
Borrowings |  |  |  |  |  | — |  |  | — |
Repayments |  |  |  |  |  | — |  |  | (16.9) |
Ending balance |  |  |  |  |  | $ | 210.3 |  |  | $ | 198.3 |

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