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Equity Method Eligible Investments (Tables) | 12 Months Ended
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Dec. 31, 2023
Equity Method Investments and Joint Ventures [Abstract] |
Schedule of significant equity method eligible investments | The following table presents the ownership interests and carrying values of White Mountain’s equity method eligible investments as of December 31, 2023 and 2022:
|  | December 31, 2023 |  | December 31, 2022
$ in Millions |  | Ownership Interest |  | Carrying Value |  | Ownership Interest |  | Carrying Value
Kudu’s Participation Contracts (1) |  | 4.1% - 30.0% |  | 890.5 |  |  | 4.1% - 30.0% |  | $ | 695.9 |
Investment in MediaAlpha |  | 34.9 | % |  | 254.9 |  |  | 27.1 | % |  | 168.6 |
PassportCard/DavidShield |  | 53.8 | % |  | 150.0 |  |  | 53.8 | % |  | 135.0 |
Elementum Holdings, L.P. |  | 26.6 | % |  | 35.0 |  |  | 29.7 | % |  | 30.0 |
Other equity method eligible investments, at fair value |  | Under 50.0% |  | 291.7 |  |  | Under 50.0% |  | 84.4 |
Other equity method eligible investments, at fair value |  | 50.0% and over |  | 24.8 |  |  | 50.0% and over |  | — |
(1) Ownership interest generally references basic ownership interest with the exception of Kudu’s Participation Contracts, which are noncontrolling equity interests in the form of revenue and earnings participation contracts. The following tables present summarized financial information for MediaAlpha as of December 31, 2023 and 2022 and for the years ended December 31, 2023, 2022, and 2021:
|  | December 31, |  |
Millions |  | 2023 |  | 2022 |  |
Balance sheet data: |  |  |  |  |  |
Total assets |  | $ | 153.9 |  |  | $ | 170.1 |  |  |
Total liabilities |  | $ | 248.4 |  |  | $ | 256.2 |  |  |
|  | Year Ended December 31, |  |
Millions |  | 2023 |  | 2022 |  | 2021 |  |
Income statement data: |  |  |  |  |  |  |  |
Total revenues |  | $ | 388.1 |  |  | $ | 459.1 |  |  | $ | 645.3 |  |  |
Total expenses |  | $ | 444.7 |  |  | $ | 531.5 |  |  | $ | 653.8 |  |  |
Net income (loss) |  | $ | (56.6) |  |  | $ | (72.4) |  |  | $ | (8.5) |  |  |
The following tables present aggregated summarized financial information for White Mountains’s investments in equity method eligible unconsolidated entities, excluding MediaAlpha:
|  | December 31, |  |
Millions |  | 2023 |  | 2022 |  |
Balance sheet data(1): |  |  |  |  |  |
Total assets |  | $ | 3,049.3 |  |  | $ | 2,252.5 |  |  |
Total liabilities |  | $ | 657.2 |  |  | $ | 526.9 |  |  |
(1) Financial data for White Mountains’s equity method eligible investees is generally reported on a one-quarter lag.
|  | Year Ended December 31, |  |
Millions |  | 2023 |  | 2022 |  | 2021 |  |
Income statement data(1): |  |  |  |  |  |  |  |
Total revenues |  | $ | 1,187.3 |  |  | $ | 735.3 |  |  | $ | 987.4 |  |  |
Total expenses |  | $ | 681.5 |  |  | $ | 515.9 |  |  | $ | 418.7 |  |  |
Net income (loss) |  | $ | 505.8 |  |  | $ | 219.4 |  |  | $ | 568.7 |  |  |
(1) Financial data for White Mountains’s equity method eligible investees is generally reported on a one-quarter lag.

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- Definition Tabular disclosure of equity method investments including, but not limited to, name of each investee or group of investments, percentage ownership, difference between recorded amount of an investment and the value of the underlying equity in the net assets, and summarized financial information. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 323 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 3 -Publisher FASB -URI https://asc.fasb.org//1943274/2147481687/323-10-50-3 + Details
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