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Accumulated Other Comprehensive Income (Tables)
 6 Months Ended
Jun. 30, 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 June 30, 2017 and 2016 is as follows:
 
June 30
 
2017
 
2016
Investments, excluding non-credit component of other-than-temporary impairments:
 
 
 
Gross unrealized gains
$
941.6

 
$
1,099.0

Gross unrealized losses
(95.3
)
 
(115.0
)
Net pre-tax unrealized gains
846.3

 
984.0

Deferred tax liability
(304.0
)
 
(358.6
)
Net unrealized gains on investments
542.3

 
625.4

Non-credit components of other-than-temporary impairments on investments:
 
 
 
Unrealized losses
(0.2
)
 
(26.4
)
Deferred tax asset
0.1

 
9.3

Net unrealized non-credit component of other-than-temporary impairments on investments
(0.1
)
 
(17.1
)
Cash flow hedges:
 
 
 
Gross unrealized losses
(355.8
)
 
(825.6
)
Deferred tax asset
124.6

 
289.0

Net unrealized losses on cash flow hedges
(231.2
)
 
(536.6
)
Defined benefit pension plans:
 
 
 
Deferred net actuarial loss
(641.2
)
 
(621.5
)
Deferred prior service credits
(0.7
)
 
(0.1
)
Deferred tax asset
251.6

 
245.1

Net unrecognized periodic benefit costs for defined benefit pension plans
(390.3
)
 
(376.5
)
Postretirement benefit plans:
 
 
 
Deferred net actuarial loss
(140.9
)
 
(156.5
)
Deferred prior service costs
52.9

 
66.6

Deferred tax asset
34.4

 
35.4

Net unrecognized periodic benefit costs for postretirement benefit plans
(53.6
)
 
(54.5
)
Foreign currency translation adjustments:
 
 
 
Gross unrealized losses
(3.1
)
 
(8.7
)
Deferred tax asset
1.1

 
3.1

Net unrealized losses on foreign currency translation adjustments
(2.0
)
 
(5.6
)
Accumulated other comprehensive loss
$
(134.9
)
 
$
(364.9
)
Other Comprehensive Income (Loss) Reclassification Adjustments
Other comprehensive income (loss) reclassification adjustments for the three months ended June 30, 2017 and 2016 are as follows:
 
Three Months Ended June 30
 
2017
 
2016
Investments:
 
 
 
Net holding gain on investment securities arising during the period, net of tax expense of ($67.0) and ($153.5), respectively
$
116.2

 
$
243.4

Reclassification adjustment for net realized gain on investment securities, net of tax expense of $8.3 and $18.1, respectively
(15.3
)
 
(33.6
)
Total reclassification adjustment on investments
100.9

 
209.8

Non-credit component of other-than-temporary impairments on investments:
 
 
 
Non-credit component of other-than-temporary impairments on investments, net of tax (expense) benefit of ($0.4) and $2.7, respectively
0.9

 
(5.4
)
Cash flow hedges:
 
 
 
Holding loss, net of tax benefit of $36.6 and $102.4, respectively
(79.8
)
 
(190.0
)
Other:
 
 
 
Net change in unrecognized periodic benefit costs for defined benefit pension and postretirement benefit plans, net of tax expense of ($2.9) and ($2.6), respectively
4.2

 
3.8

Foreign currency translation adjustment, net of tax (expense) benefit of ($0.4) and $0.5, respectively
0.7

 
(0.7
)
Net gain recognized in other comprehensive income, net of tax expense of ($25.8) and ($32.4), respectively
$
26.9

 
$
17.5


Other comprehensive income (loss) reclassification adjustments for the six months ended June 30, 2017 and 2016 are as follows:
 
Six Months Ended June 30
 
2017
 
2016
Investments:
 
 
 
Net holding gain on investment securities arising during the period, net of tax expense of ($113.3) and ($239.1), respectively
$
210.4

 
$
390.9

Reclassification adjustment for net realized gain on investment securities, net of tax expense of $15.8 and $4.7, respectively
(29.3
)
 
(8.8
)
Total reclassification adjustment on investments
181.1

 
382.1

Non-credit component of other-than-temporary impairments on investments:
 
 
 
Non-credit component of other-than-temporary impairments on investments, net of tax (expense) benefit of ($2.5) and $3.9, respectively
4.5

 
(7.1
)
Cash flow hedges:
 
 
 
Holding loss, net of tax benefit of $33.9 and $245.3, respectively
(62.8
)
 
(455.5
)
Other:
 
 
 
Net change in unrecognized periodic benefit costs for defined benefit pension and postretirement benefit plans, net of tax expense of ($5.2) and ($5.0), respectively
8.1

 
7.6

Foreign currency translation adjustment, net of tax expense of ($1.1) and ($0.2), respectively
2.1

 
0.6

Net gain (loss) recognized in other comprehensive income, net of tax (expense) benefit of ($72.4) and $9.6, respectively
$
133.0

 
$
(72.3
)