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Debt (Tables) | 6 Months Ended
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Jun. 30, 2019
Debt Disclosure [Abstract] |
Schedule of debt outstanding | The following table presents White Mountains’s debt outstanding as of June 30, 2019 and December 31, 2018:
Millions |  | June 30, 2019 |  | Effective Rate (1) |  | December 31, 2018 |  | Effective Rate (1)
NSM Bank Facility |  | $ | 222.3 |  |  | 7.7% |  | $ | 180.4 |  |  | 7.4%
Unamortized issuance cost |  | (4.3 | ) |  |  |  | (3.8 | ) |  |
NSM Bank Facility, carrying value |  | 218.0 |  |  |  |  | 176.6 |  |  |
Other NSM debt |  | 1.7 |  |  | 2.2% |  | 1.9 |  |  | 2.2%
MediaAlpha Bank Facility |  | — |  |  |  |  | 14.3 |  |  | 7.1%
Unamortized issuance cost |  | — |  |  |  |  | (.1 | ) |  |
MediaAlpha Bank Facility, carrying value |  | — |  |  |  |  | 14.2 |  |  |
Other Operations debt |  | 11.2 |  |  | 9.9% |  | — |  |  |
Unamortized issuance cost |  | (.4 | ) |  |  |  | — |  |  |
Other Operations, carrying value |  | 10.8 |  |  |  |  | — |  |  |
Total debt |  | $ | 230.5 |  |  |  |  | $ | 192.7 |  |  |
(1) Effective rate considers the effect of the debt issuance costs.

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