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Common Shareholders’ Equity and Non-controlling Interests (Tables) | 12 Months Ended
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Dec. 31, 2022
Stockholders' Equity Note [Abstract] |
Schedule of noncontrolling interest | The following table presents the balance of non-controlling interests included in White Mountains’s total equity and the related percentage of each consolidated entity’s total equity owned by non-controlling shareholders as of December 31, 2022 and 2021:
|  | December 31, 2022 |  | December 31, 2021
$ in Millions |  | Non-controlling Percentage (1) |  | Non-controlling Equity |  | Non-controlling Percentage (1) |  | Non-controlling Equity
Non-controlling interests, excluding BAM |  |  |  |  |  |  |  |
HG Global |  | 3.1 | % |  | $ | (.6) |  |  | 3.1 | % |  | $ | 8.9 |
Ark |  | 28.0 | % |  | 247.9 |  |  | 28.0 | % |  | 230.7 |
Kudu |  | 10.8 | % |  | 75.1 |  |  | 2.5 | % |  | 12.4 |
NSM (2) |  | — | % |  | — |  |  | 3.5 | % |  | 16.7 |
Other |  | various |  | 20.4 |  |  | various |  | 11.9 |
Total, excluding BAM |  |  |  | 342.8 |  |  |  |  | 280.6 |
BAM |  | 100.0 | % |  | (154.7) |  |  | 100.0 | % |  | (124.0) |
Total non-controlling interests |  |  |  | $ | 188.1 |  |  |  |  | $ | 156.6 |
(1) The non-controlling percentage represents the basic ownership interests held by non-controlling shareholders with the exception of HG Global, for which the non-controlling percentage represents the preferred share ownership held by non-controlling shareholders. (2) As a result of the NSM Transaction, NSM has been classified as discontinued operations through the closing of the transaction. See Note 21 — “Held for Sale and Discontinued Operations.”

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- Definition Tabular disclosure of redeemable noncontrolling interest (as defined) included in the statement of financial position as either a liability or temporary equity. As of the date of the statement of financial position, such redeemable noncontrolling interest is currently redeemable, as defined, for cash or other assets of the entity at (1) at a fixed or determinable price on a fixed or determinable date, (2) at the option of the holder of the noncontrolling interest, or (3) upon occurrence of an event that is not solely within the control of the entity. + References No definition available. + Details
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- References No definition available. + Details
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