Investments in Unconsolidated Affiliates (Tables)

12 Months Ended

Dec. 31, 2017

Investments in and Advances to Affiliates [Table Text Block]

The following table presents the carrying values of investments in equity method eligible unconsolidated entities recorded within other long-term investments:

	December 31
Millions	2017		2016
Equity method eligible private equity securities, at fair value	$	58.0	$	55.6
Investments, accounted for under the equity method	4.6		3.5
Total investments in equity method eligible unconsolidated entities	62.6		59.1
Other unconsolidated investments (1)	146.2		113.7
Total other long-term investments	$	208.8	$	172.8

⁽¹⁾ Consists of other long-term investments that are not equity method eligible.

Affiliated Entity [Member]

Equity Method Investments [Table Text Block]

The following table presents White Mountains’s investments in equity method eligible unconsolidated entities as of December 31, 2017 and 2016:

Investee	Ownership Interest	Instrument Held
Compare.com	22%	Common shares
durchblicker	45%	Common shares
OneTitle	20%	Common shares
PassportCard	50%	Common shares
Tuckerman Capital Fund III	21%	Units

Total investments in equity method eligible unconsolidated entities

Equity Method Investments [Table Text Block]

The following tables presents aggregated summarized financial information for White Mountains’s investments in equity method eligible unconsolidated entities:

	December 31,
Millions	2017		2016
Balance sheet data (1):
Total assets	$	75.4	$	79.4
Total liabilities	24.2		18.8

⁽¹⁾Financial data submitted by investees is on a one-quarter lag.

	Year Ended December 31,
Millions	2017			2016			2015
Income statement data (1):
Revenues	$	60.0		$	32.9		$	12.9
Expenses	(66.8		)	(76.4		)	(69.9		)

⁽¹⁾Financial data submitted by investees is on a one-quarter lag.

Symetra

Equity Method Investments [Table Text Block]

The following tables presents financial information for Symetra as of September 30, 2015:

	September 30,
Millions	2015
Symetra balance sheet data:
Total investments	$	32,409.2
Separate account assets	885.9
Total assets	34,962.8
Policyholder liabilities	29,492.0
Long-term debt	697.5
Separate account liabilities	885.9
Total liabilities	31,836.7
Common shareholders’ equity	3,126.1

The following tables presents financial information for Symetra for the nine months ended September 30, 2015:

	Nine months ended September 30, 2015
Millions
Symetra income statement data:
Net premiums earned	$	539.3
Net investment income	994.3
Total revenues	1,605.9
Policy benefits	1,143.7
Total expenses	1,543.6
Net income	89.6
Comprehensive net loss	(234.1		)