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Accumulated Other Comprehensive Income
 12 Months Ended
Dec. 31, 2017
Equity [Abstract]  
Accumulated Other Comprehensive Income
ACCUMULATED OTHER COMPREHENSIVE INCOME
Certain amounts included in the statements of comprehensive income are net of reclassification adjustments. The following tables summarize those reclassification adjustments (net of taxes):
 
Year Ended December 31, 2017
 
Unrealized
 gains on
 securities
 
OTTI
 
Accumulated
 other
 comprehensive
 income
Balance at December 31, 2016
$
95.1

 
$
8.6

 
$
103.7

Other comprehensive income before reclassifications
27.8

 
0.6

 
28.4

Amounts reclassified from accumulated other comprehensive income
(3.9
)
 
—

 
(3.9
)
Net current-period other comprehensive income
23.9

 
0.6

 
24.5

Balance at December 31, 2017
$
119.0

 
$
9.2

 
$
128.2

 
Year Ended December 31, 2016
 
Unrealized
 gains on
 securities
 
OTTI
 
Accumulated
 other
 comprehensive
 income
Balance at December 31, 2015
$
174.2

 
$
9.3

 
$
183.5

Other comprehensive income (loss) before reclassifications
17.1

 
(0.3
)
 
16.8

Amounts reclassified from accumulated other comprehensive income
(96.2
)
 
(0.4
)
 
(96.6
)
Net current-period other comprehensive loss
(79.1
)
 
(0.7
)
 
(79.8
)
Balance at December 31, 2016
$
95.1

 
$
8.6

 
$
103.7

 
Year Ended December 31, 2015
 
Unrealized
 gains on
 securities
 
OTTI
 
Accumulated
 other
 comprehensive
 income
Balance at December 31, 2014
$
273.5

 
$
10.3

 
$
283.8

Other comprehensive loss before reclassifications
(95.9
)
 
(1.5
)
 
(97.4
)
Amounts reclassified from accumulated other comprehensive income
(3.4
)
 
0.5

 
(2.9
)
Net current-period other comprehensive loss
(99.3
)
 
(1.0
)
 
(100.3
)
Balance at December 31, 2015
$
174.2

 
$
9.3

 
$
183.5













The following tables summarize the reclassifications out of accumulated other comprehensive income:
Details about accumulated
 other comprehensive
 income components
 
Amount reclassified from accumulated
 other comprehensive income
 
Affected line item in the statement
 where net income is presented
 
 
Years Ended December 31,
 
 
 
 
2017
 
2016
 
2015
 
 
Unrealized gains on securities
 
$
(6.0
)
 
$
(148.0
)
 
$
(5.2
)
 
Net realized gains on investments, excluding
other-than-temporary impairment losses
 
 
2.1

 
51.8

 
1.8

 
Provision for income taxes
 
 
$
(3.9
)
 
$
(96.2
)
 
$
(3.4
)
 
Net of tax
OTTI
 
$
—

 
$
(0.6
)
 
$
0.8

 
Portion of net (gain) loss recognized in other
comprehensive income, before taxes
 
 
—

 
0.2

 
(0.3
)
 
Provision for income taxes
 
 
$
—

 
$
(0.4
)
 
$
0.5

 
Net of tax
Total reclassifications for the period
 
$
(3.9
)
 
$
(96.6
)
 
$
(2.9
)
 
Net of tax