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v3.10.0.1

Accumulated Other Comprehensive (Loss) Income (Details) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2018 | Sep. 30, 2017 | Sep. 30, 2018 | Sep. 30, 2017
Accumulated Other Comprehensive Income (Loss) [Line Items] |  |  |  |
Estimated net mark-to-market loss before tax within next twelve months | $ (4.4) |  |  |
AOCI Attributable to Parent, Net of Tax [Roll Forward] |  |  |  |
Beginning balance |  |  | $ 746.3 |
Other comprehensive (loss) income, net of tax |  |  | (2.7) |
Ending balance | 762.5 |  | 762.5 |
Accumulated Defined Benefit Plans Adjustment Attributable to Parent [Member] |  |  |  |
AOCI Attributable to Parent, Net of Tax [Roll Forward] |  |  |  |
Beginning balance | (36.1) | $ (35.4) | (38.5) | $ (37.1)
Less: income tax benefit | (0.4) | (0.5) | (1.1) | (1.6)
Reclassification from AOCI, Current Period, Net of Tax, Attributable to Parent | 1.1 | 0.9 | 3.5 | 2.6
Defined Benefit Plan, Benefit Obligation, Foreign Currency Translation Gain (Loss) | 0.0 | (0.1) | 0.0 | (0.1)
Other comprehensive (loss) income, net of tax | 1.1 | 0.8 | 3.5 | 2.5
Ending balance | (35.0) | (34.6) | (35.0) | (34.6)
Accumulated Defined Benefit Plans Adjustment, Net Gain (Loss) Attributable to Parent [Member] |  |  |  |
AOCI Attributable to Parent, Net of Tax [Roll Forward] |  |  |  |
Reclassification of unrealized gain upon sale of available for sale securities | 0.2 | 0.2 | 0.6 | 0.6
Accumulated Defined Benefit Plans Adjustment, Net Prior Service Attributable to Parent [Member] |  |  |  |
AOCI Attributable to Parent, Net of Tax [Roll Forward] |  |  |  |
Reclassification of unrealized gain upon sale of available for sale securities | 1.3 | 1.2 | 4.0 | 3.6
Accumulated Net Investment Gain (Loss) Attributable to Parent [Member] |  |  |  |
AOCI Attributable to Parent, Net of Tax [Roll Forward] |  |  |  |
Beginning balance | 0.6 | 1.1 | 0.9 | 0.8
Unrealized gain on available for sale securities | 1.3 | 1.0 | 3.6 | 3.1
Less: income tax expense | (0.3) | (0.4) | (0.9) | (1.2)
Net unrealized gain on available for sale securities | 1.0 | 0.6 | 2.7 | 1.9
Reclassification of unrealized gain upon sale of available for sale securities | (1.6) | (0.5) | (4.3) | (2.1)
Less: income tax benefit | 0.4 | 0.2 | 1.1 | 0.8
Reclassification from AOCI, Current Period, Net of Tax, Attributable to Parent | (1.2) | (0.3) | (3.2) | (1.3)
Other comprehensive (loss) income, net of tax | (0.2) | 0.3 | (0.5) | 0.6
Ending balance | 0.4 | 1.4 | 0.4 | 1.4
Accumulated Net Gain (Loss) from Cash Flow Hedges Attributable to Parent [Member] |  |  |  |
AOCI Attributable to Parent, Net of Tax [Roll Forward] |  |  |  |
Beginning balance | (3.5) | 0.1 | 0.5 |
Unrealized gain on available for sale securities | (5.2) | 1.0 | (6.5) | 1.2
Less: income tax expense | 1.2 | (0.4) | 1.6 | (0.5)
Net unrealized gain on available for sale securities | (4.0) | 0.6 | (4.9) | 0.7
Reclassification of unrealized gain upon sale of available for sale securities | 3.0 | (0.3) | (1.0) | 0.0
Less: income tax benefit | (0.7) | 0.1 | 0.2 | 0.0
Reclassification from AOCI, Current Period, Net of Tax, Attributable to Parent | 2.3 | (0.2) | (0.8) | 0.0
Other comprehensive (loss) income, net of tax | (1.7) | 0.4 | (5.7) | 0.7
Ending balance | (5.2) | 0.5 | (5.2) | 0.5
Accumulated Other Comprehensive Loss (Other) [Member] |  |  |  |
AOCI Attributable to Parent, Net of Tax [Roll Forward] |  |  |  |
Beginning balance | 0.0 | (0.1) | 0.0 | (0.2)
Other comprehensive (loss) income, net of tax | 0.0 | 0.1 | 0.0 | 0.2
Ending balance | 0.0 | 0.0 | 0.0 | 0.0
AOCI Attributable to Parent [Member] |  |  |  |
AOCI Attributable to Parent, Net of Tax [Roll Forward] |  |  |  |
Beginning balance |  |  | (36.7) |
Other comprehensive (loss) income, net of tax |  |  | (2.7) |
Ending balance | $ (39.8) | $ (32.7) | $ (39.8) | $ (32.7)

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