Accumulated Other Comprehensive Loss (Tables)

12 Months Ended

Dec. 31, 2017

Comprehensive Income (Loss), Net of Tax, Attributable to Parent [Abstract]

Components of Accumulated Other Comprehensive Loss

A reconciliation of the components of accumulated other comprehensive loss at December 31, 2017 and 2016 is as follows:

	2017			2016
Investments:
Gross unrealized gains	$	939.7		$	748.6
Gross unrealized losses	(104.9		)	(180.9		)
Net pretax unrealized gains	834.8			567.7
Deferred tax liability	(301.1		)	(206.5		)
Net unrealized gains on investments	533.7			361.2
Non-credit components of OTTI on investments:
Gross unrealized losses	(0.3		)	(7.2		)
Deferred tax asset	0.1			2.6
Net unrealized non-credit component of OTTI on investments	(0.2		)	(4.6		)
Cash flow hedges:
Gross unrealized losses	(358.6		)	(259.1		)
Deferred tax asset	125.6			90.7
Net unrealized losses on cash flow hedges	(233.0		)	(168.4		)
Defined benefit pension plans:
Deferred net actuarial loss	(624.7		)	(655.8		)
Deferred prior service cost	(1.0		)	(0.5		)
Deferred tax asset	244.1			257.2
Net unrecognized periodic benefit costs for defined benefit pension plans	(381.6		)	(399.1		)
Postretirement benefit plans:
Deferred net actuarial loss	(77.5		)	(146.6		)
Deferred prior service credits	46.1			59.7
Deferred tax asset	12.3			34.0
Net unrecognized periodic benefit costs for postretirement benefit plans	(19.1		)	(52.9		)
Foreign currency translation adjustments:
Gross unrealized losses	(2.1		)	(6.3		)
Deferred tax asset	0.8			2.2
Net unrealized losses on foreign currency translation adjustments	(1.3		)	(4.1		)
Accumulated other comprehensive loss	$	(101.5	)	$	(267.9	)

Other Comprehensive Income (Loss) Reclassification Adjustments

Other comprehensive income (loss) reclassification adjustments for the years ended December 31, 2017, 2016 and 2015 are as follows:

	2017			2016			2015
Investments:
Net holding gain (loss) on investment securities arising during the period, net of tax (expense) benefit of ($152.6), ($118.9), and $180.4, respectively	$	280.1		$	186.0		$	(336.1	)
Reclassification adjustment for net realized gain on investment securities, net of tax expense of $58.0, $36.6, and $25.9, respectively	(107.6		)	(68.1		)	(48.2		)
Total reclassification adjustment on investments	172.5			117.9			(384.3		)
Non-credit component of OTTI on investments:
Non-credit component of OTTI on investments, net of tax (expense) benefit of ($2.8), ($2.8), and $3.0, respectively	4.4			5.4			(5.6		)
Cash flow hedges:
Holding loss, net of tax benefit of $34.9, $47.0, and $24.4, respectively	(64.6		)	(87.3		)	(45.2		)
Other:
Net change in unrecognized periodic benefit costs for defined benefit pension and postretirement benefit plans, net of tax (expense) benefit of ($34.8), $5.7, and $13.4, respectively	51.3			(13.4		)	(26.0		)
Foreign currency translation adjustment, net of tax (expense) benefit of ($1.4), ($1.1), and $1.8, respectively	2.8			2.1			(3.4		)
Net gain (loss) recognized in other comprehensive loss, net of tax (expense) benefit of ($98.7), ($33.5), and $248.9, respectively	$	166.4		$	24.7		$	(464.5	)