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SCHEDULE VI SUPPLEMENTAL INFORMATION FOR PROPERTY AND CASUALTY INSURANCE UNDERWRITERS | 12 Months Ended
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Dec. 31, 2016
Supplemental Information for Property, Casualty Insurance Underwriters [Abstract] |
SCHEDULE VI SUPPLEMENTAL INFORMATION FOR PROPERTY AND CASUALTY INSURANCE UNDERWRITERS | WHITE MOUNTAINS INSURANCE GROUP, LTD. SUPPLEMENTAL INFORMATION FOR PROPERTY AND CASUALTY INSURANCE UNDERWRITERS (3) (Millions)
Column A |  | Column B |  | Column C |  | Column D |  | Column E |  | Column F |  | Column G |  | Column H |  | Column I |  | Column J |  | Column K
Affiliation with registrant |  | Deferred acquisition costs |  | Reserves for Unpaid Claims and Claims Adjustment Expenses |  | Discount, if any, deducted in Column C |  | Unearned Premiums |  | Earned Premiums |  | Net investment income |  | Claims and Claims Adjustment Expenses Incurred Related to |  | Amortization of deferred policy acquisition costs |  | Paid Claims and Claims Adjustment Expenses |  | Premiums written
Millions |  |  |  |  |  |  |  | Current Year (1) |  | Prior Year |  |  |
OneBeacon: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
2016 |  | $ | 96.3 |  |  | $ | 1,365.6 |  |  | $ | 1.6 |  | (1) | $ | 575.1 |  |  | $ | 1,100.6 |  |  | $ | 50.6 |  |  | $ | 640.6 |  |  | $ | 15.4 |  |  | $ | (206.0 | ) |  | $ | 667.1 |  |  | $ | 1,100.7 |
2015 |  | 100.7 |  |  | 1,389.8 |  |  | 1.1 |  | (1) | 560.3 |  |  | 1,176.2 |  |  | 45.9 |  |  | 702.5 |  |  | (1.8 | ) |  | (213.8 | ) |  | 677.5 |  |  | 1,136.6 |
2014 |  | 103.2 |  |  | 1,342.2 |  |  | 1.0 |  | (1) | 588.3 |  |  | 1,177.1 |  |  | 43.4 |  |  | 725.3 |  |  | 89.8 |  |  | (203.3 | ) |  | 608.6 |  |  | 1,216.9 |
Other operations(2): |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
2016 |  | $ | — |  |  | $ | 5.0 |  |  | $ | — |  |  | $ | 1.2 |  |  | $ | 7.5 |  |  | $ | .2 |  |  | $ | 8.6 |  |  | $ | (0.6 | ) |  | $ | — |  |  | $ | 8.8 |  |  | $ | 6.5 |
2015 |  | — |  |  | 6.0 |  |  | — |  |  | 2.1 |  |  | 8.7 |  |  | .2 |  |  | 10.4 |  |  | (2.2 | ) |  | — |  |  | 10.4 |  |  | 10.1 |
2014 |  | — |  |  | 7.8 |  |  | — |  |  | .8 |  |  | 6.1 |  |  | .2 |  |  | 6.7 |  |  | 2.2 |  |  | — |  |  | 14.8 |  |  | 5.9 |
(1) | The amounts shown represent OneBeacon’s discount on its long-term workers compensation loss and LAE reserves, as such liabilities constitute unpaid but settled claims under which the payment pattern and ultimate costs are fixed and determinable on an individual basis. OneBeacon discounts these reserves using a discount rate which is determined based on the facts and circumstances applicable at the time the claims are settled (2.5% as of December 31, 2016, 2015 and 2014).
(2) | The Other operations amounts shown relate to SSIE. SSIE’s results are attributed to non-controlling interests. SSIE’s assets and liabilities are presented held for sale. See Note 22 — “Held for Sale and Discontinued Operations”.
(3) | Schedule excludes amounts related to Sirius Group for all periods presented. See Note 22 — “Held for Sale and Discontinued Operations”.
Schedules of the Registrant should be read in conjunction with the Consolidated Financial Statements and Notes.

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- Definition The entire disclosure for the supplemental schedule of information for an entity who has a consolidated property-casualty insurance underwriter, unconsolidated property-casualty subsidiary or fifty percent-or-less owned property-casualty equity investee. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 235 -Section S99 -Paragraph 3 -Subparagraph (SX 210.12-18) -URI http://asc.fasb.org/extlink&oid=34713774&loc=d3e575016-122915 + Details
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