Transactions with Affiliates (Tables)

12 Months Ended

Dec. 31, 2017

Schedule of Reinsurance Transactions on Balance Sheets for Pooling Arrangement

The following table sets forth the reinsurance transactions on the Company’s balance sheets for the Pooling Arrangement between the STFC Pooled Companies and State Auto Mutual at December 31, 2017 and 2016:



($ millions)	2017			2016
Assets
Deferred policy acquisition costs:
Ceded	$	(53.1	)	$	(79.1	)
Assumed	117.8			129.8
Net assumed	$	64.7		$	50.7

Liabilities and Stockholders’ Equity
Losses and loss expenses payable:
Ceded	$	(541.1	)	$	(547.1	)
Assumed	1,252.5			1,178.0
Net assumed	$	711.4		$	630.9
Unearned premiums:
Ceded	$	(417.5	)	$	(390.8	)
Assumed	605.4			611.7
Net assumed	$	187.9		$	220.9
Pension and postretirement benefits:
Ceded	$	(99.3	)	$	(114.5	)
Assumed	64.5			74.4
Net ceded	$	(34.8	)	$	(40.1	)
Other liabilities:
Ceded	$	(43.0	)	$	(42.9	)
Assumed	58.5			53.9
Net assumed	$	15.5		$	11.0
Stockholders’ Equity
Accumulated other comprehensive income:
Ceded	$	(144.7	)	$	(153.5	)
Assumed	94.0			99.8
Net ceded	$	(50.7	)	$	(53.7	)

Schedule of Reinsurance Transactions on Income Statements for Pooling Arrangement

The following table sets forth the reinsurance transactions on the Company’s income statements for the Pooling Arrangement between the STFC Pooled Companies and State Auto Mutual for the years ended December 31, 2017, 2016 and 2015:



($ millions)	2017			2016			2015
Written premiums:
Ceded	$	(843.8	)	$	(815.5	)	$	(823.4	)
Assumed	1,269.3			1,293.3			1,273.5
Net assumed	$	425.5		$	477.8		$	450.1
Earned premiums:
Ceded	$	(817.1	)	$	(819.9	)	$	(832.9	)
Assumed	1,275.1			1,291.9			1,270.5
Net assumed	$	458.0		$	472.0		$	437.6
Losses and loss expenses incurred:
Ceded	$	(540.4	)	$	(560.3	)	$	(570.9	)
Assumed	920.0			944.1			864.2
Net assumed	$	379.6		$	383.8		$	293.3
Acquisition and operating expenses:
Ceded	(189.7		)	(148.5		)	(183.9		)
Assumed	460.4			434.3			432.5
Net assumed	$	270.7		$	285.8		$	248.6