SCHEDULE III SUPPLEMENTARY INSURANCE INFORMATION

12 Months Ended

Dec. 31, 2019

SEC Schedule, 12-16, Insurance Companies, Supplementary Insurance Information [Abstract]

SCHEDULE III SUPPLEMENTARY INSURANCE INFORMATION

WHITE MOUNTAINS INSURANCE GROUP, LTD.

SUPPLEMENTARY INSURANCE INFORMATION ⁽¹⁾ 

	Column A	Column B		Column C		Column D		Column E		Column F		Column G		Column H		Column  I		Column J		Column K
	Millions Segment	Deferred Acqui- sition Costs		Future Policy Benefits, Losses, Claims and Loss Expenses		Unearned Premiums		Other Policy Claims and Benefits Payable		Premiums Earned		Net Investment Income		Benefits, Claims, Losses and Settlement Expenses		Amortization of Deferred Policy Acquisition Costs		Other Operating Expenses		Premiums Written
Years ended:
December 31, 2019
	HG Global/ BAM	$	22.1	$	—	$	198.4	$	—	$	16.3	$	21.6	$	—	$	5.7	$	.4	$	38.7
	Other      Operations (2)	—		—		—		—		—		—		—		—		—		—
December 31, 2018
	HG Global/ BAM	19.0		—		176.0		—		13.9		16.7		—		5.3		.4		52.9
	Other      Operations (2)	—		—		—		—		—		—		—		—		—		—
December 31, 2017
	HG Global/ BAM	14.8		—		136.8		—		9.4		12.3		—		4.0		.4		63.2
	Other      Operations (2)(3)	—		—		—		—		1.0		—		1.1		.1		—		.9

⁽¹⁾ Schedule excludes activity related to OneBeacon and Sirius Group for the year ended December 31, 2017. See Note 20 — “Held for Sale and Discontinued Operations”.

⁽²⁾ The amounts shown exclude net investment income relating to non-insurance operations of $43.4, $42.3 and $43.7 for the twelve months ended December 31, 2019, 2018 and 2017, respectively.

⁽³⁾ The Other Operations amounts shown relate to SSIE. White Mountains completed the sale of SSIE on March 7, 2017. See Note 20 — “Held for Sale and Discontinued Operations”.

Schedules of the Registrant should be read in conjunction with the Consolidated Financial Statements and Notes.