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Investments in Unconsolidated Entities (Tables) | 6 Months Ended
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Jun. 30, 2019
Schedule of Equity Method Investments [Line Items] |
Investments in and Advances to Affiliates | The following table presents the carrying values of investments in equity method eligible unconsolidated entities recorded within other long-term investments as of June 30, 2019 and December 31, 2018:
Millions |  | June 30, 2019 |  | December 31, 2018
Equity method eligible unconsolidated entities, at fair value |  | $ | 262.2 |  |  | $ | 138.1 |
Investments accounted for under the equity method |  | .7 |  |  | 1.3 |
Total investments in equity method eligible unconsolidated entities |  | 262.9 |  |  | 139.4 |
Other unconsolidated investments (1) |  | 401.5 |  |  | 186.2 |
Total other long-term investments |  | $ | 664.4 |  |  | $ | 325.6 |
(1) Consists of other long-term investments that are not equity method eligible.
Affiliated Entity |
Schedule of Equity Method Investments [Line Items] |
Equity Method Investments | The following table presents White Mountains’s investments in equity method eligible unconsolidated entities as of June 30, 2019 and December 31, 2018:
|  | Basic Ownership Interest |  |
Investee |  | June 30, 2019 |  | December 31, 2018 |  | Instrument Held
PassportCard/DavidShield (1) |  | 50.0% |  | 50.0% |  | Common shares
MediaAlpha(2) |  | 48.3% |  | n/a |  | Units
durchblicker |  | 45.0% |  | 45.0% |  | Common shares
Elementum Holdings, L.P. |  | 30.0% |  | n/a |  | Limited partnership interest
Compare.com |  | 18.4% |  | 18.4% |  | Common shares
Tuckerman Capital Fund III, L.P. |  | 16.2% |  | 18.5% |  | Limited partnership interest
Kudu (3) |  | n/a |  | 49.5% |  | Units
(1) As of June 30, 2019 and December 31, 2018, White Mountains’s ownership interest in DavidShield comprised a 50.0% direct interest and White Mountains’s ownership interest in PassportCard comprised a 25.0% direct ownership interest and a 25.0% indirect interest through DavidShield. See Note 2 — “Significant Transactions”. (2) As of December 31, 2018, MediaAlpha was a majority-owned consolidated subsidiary of White Mountains. See Note 2 — “Significant Transactions”. (3) As of June 30, 2019 White Mountains consolidates Kudu. See Note 2 — “Significant Transactions”.

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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://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 323 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=114001798&loc=d3e33918-111571 + Details
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- Definition Tabular disclosure of investments in and advances to affiliates. Does not include the tabular disclosure of the disaggregation of investments in and advances to affiliates across legal entities. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 946 -SubTopic 320 -Section S99 -Paragraph 6 -Subparagraph (SX 210.12-14) -URI http://asc.fasb.org/extlink&oid=50485924&loc=d3e611322-123010 + Details
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