Stockholders' Equity (Tables)

12 Months Ended

Dec. 31, 2016

Stockholders' Equity Note [Abstract]

Reconciliations of Statutory Capital and Surplus and Net Income

The following tables set forth reconciliations of statutory capital and surplus and net income, as determined using SAP, to the amounts included in the accompanying consolidated financial statements:

($ millions)	2016			2015
Statutory capital and surplus of insurance subsidiaries	$	844.4		$	814.3
Net liabilities of non-insurance parent and affiliates	(84.9		)	(80.2		)
	759.5			734.1
Increases (decreases):
Deferred acquisition costs	129.8			129.1
Postretirement and pension benefits	22.7			23.2
Deferred federal income taxes	(49.1		)	(41.6		)
Fixed maturities, at fair value	13.5			27.9
Other, net	14.9			11.9
Stockholders’ equity per accompanying consolidated financial statements	$	891.3		$	884.6

($ millions)	Year ended December 31
	2016			2015			2014
Statutory net income (loss) of insurance subsidiaries	$	22.7		$	65.4		$	(17.5	)
Net loss of non-insurance parent and affiliates	(3.0		)	(4.1		)	(5.3		)
	19.7			61.3			(22.8		)
Increases (decreases):
Deferred acquisition costs	0.7			2.5			29.7
Postretirement and pension benefits	4.4			4.2			10.6
Deferred federal income taxes	(5.4		)	(12.2		)	79.3
Share-based compensation expense	—			(0.1		)	(0.5		)
Other, net	1.6			(4.5		)	11.1
Net income per accompanying consolidated financial statements	$	21.0		$	51.2		$	107.4