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Other Comprehensive Income (Details) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2016 | Jun. 30, 2015 | Jun. 30, 2016 | Jun. 30, 2015
Other Comprehensive Income (Loss), before Tax |  |  |  |
Other Comprehensive Income (Loss), before Tax | $ 1.4 | $ 0.6 | $ 2.8 | $ 108.4
Unrealized (loss) gain on foreign currency cash flow hedges | (0.1) | (0.2) | 0.1 | (0.2)
Other Comprehensive Income (Loss), Tax, Portion Attributable to Parent, Parenthetical Disclosures [Abstract] |  |  |  |
Other Comprehensive Income (Loss), Tax | (0.5) | (0.2) | (1.0) | (41.1)
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent [Abstract] |  |  |  |
Other Comprehensive Income (Loss), Net of Tax | 0.9 | 0.4 | 1.8 | 67.3
Accumulated Defined Benefit Plans Adjustment Attributable to Parent |  |  |  |
Other Comprehensive Income (Loss), before Tax |  |  |  |
Other Comprehensive Income (Loss), before Tax | 1.1 | 1.0 | 2.2 | 108.6
Other Comprehensive Income (Loss), Tax, Portion Attributable to Parent, Parenthetical Disclosures [Abstract] |  |  |  |
Other Comprehensive Income (Loss), Tax | (0.4) | (0.4) | (0.8) | (41.2)
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent [Abstract] |  |  |  |
Other Comprehensive Income (Loss), Net of Tax | 0.7 | 0.6 | 1.4 | 67.4
Amortization of net actuarial loss |  |  |  |
Other Comprehensive Income (Loss), before Tax |  |  |  |
Reclassification from Accumulated Other Comprehensive Income, Current Period, before Tax | 0.1 | 0.2 | 0.2 | 0.5
Other Comprehensive Income (Loss), Tax, Portion Attributable to Parent, Parenthetical Disclosures [Abstract] |  |  |  |
Reclassification from AOCI, Current Period, Tax | (0.1) | (0.1) | (0.1) | (0.2)
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent [Abstract] |  |  |  |
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax | 0.0 | 0.1 | 0.1 | 0.3
Amortization of prior service cost |  |  |  |
Other Comprehensive Income (Loss), before Tax |  |  |  |
Reclassification from Accumulated Other Comprehensive Income, Current Period, before Tax | 1.0 | 0.8 | 2.0 | 1.5
Other Comprehensive Income (Loss), Tax, Portion Attributable to Parent, Parenthetical Disclosures [Abstract] |  |  |  |
Reclassification from AOCI, Current Period, Tax | (0.3) | (0.3) | (0.7) | (0.6)
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent [Abstract] |  |  |  |
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax | 0.7 | 0.5 | 1.3 | 0.9
Removal of obligation relating to Union VEBA |  |  |  |
Other Comprehensive Income (Loss), before Tax |  |  |  |
Reclassification from Accumulated Other Comprehensive Income, Current Period, before Tax |  |  |  | 106.6
Other Comprehensive Income (Loss), Tax, Portion Attributable to Parent, Parenthetical Disclosures [Abstract] |  |  |  |
Reclassification from AOCI, Current Period, Tax |  |  |  | (40.4)
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent [Abstract] |  |  |  |
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax |  |  |  | 66.2
Other comprehensive loss relating to available for sale securities |  |  |  |
Other Comprehensive Income (Loss), before Tax |  |  |  |
Reclassification from Accumulated Other Comprehensive Income, Current Period, before Tax |  | 0.1 |  | 0.2
Other Comprehensive Income (Loss), before Tax |  | (0.2) |  | (0.1)
Other Comprehensive Income (Loss), Tax, Portion Attributable to Parent, Parenthetical Disclosures [Abstract] |  |  |  |
Reclassification from AOCI, Current Period, Tax |  | 0.0 |  | (0.1)
Other Comprehensive Income (Loss), Tax |  | 0.1 |  | 0.0
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent [Abstract] |  |  |  |
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax |  | 0.1 |  | 0.1
Other Comprehensive Income (Loss), Net of Tax |  | (0.1) |  | (0.1)
Other Comprehensive Income (Loss), before Reclassifications, before Tax | 0.4 | (0.3) | 0.4 | (0.3)
Other Comprehensive Income (Loss) before Reclassifications, Tax | 0.1 | (0.1) | 0.1 | (0.1)
Other Comprehensive Income (Loss), before Reclassifications, Net of Tax | 0.3 | (0.2) | 0.3 | (0.2)
Foreign currency translation gain |  |  |  |
Other Comprehensive Income (Loss), before Tax |  |  |  |
Other Comprehensive Income (Loss), before Tax |  |  |  | 0.1
Unrealized (loss) gain on foreign currency cash flow hedges | (0.1) |  |  |
Other Comprehensive Income (Loss), Tax, Portion Attributable to Parent, Parenthetical Disclosures [Abstract] |  |  |  |
Other Comprehensive Income (Loss), Tax |  |  |  | 0.0
Other Comprehensive Income (Loss), Derivatives Qualifying as Hedges, Tax | 0.0 |  |  |
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent [Abstract] |  |  |  |
Other Comprehensive Income (Loss), Net of Tax |  |  |  | 0.1
Other Comprehensive Income (Loss), Derivatives Qualifying as Hedges, Net of Tax | $ (0.1) |  |  |
Foreign currency translation gain | Canadian Pension Plan |  |  |  |
Other Comprehensive Income (Loss), before Tax |  |  |  |
Canadian Pension foreign currency translation changes (before tax) |  |  | 0.1 |
Other Comprehensive Income (Loss), Tax, Portion Attributable to Parent, Parenthetical Disclosures [Abstract] |  |  |  |
Canadian Pension foreign currency translation changes (tax) |  |  | 0.0 |
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent [Abstract] |  |  |  |
Canadian Pension foreign currency translation changes (net of tax) |  |  | 0.1 |
Accumulated Net Gain (Loss) from Cash Flow Hedges Attributable to Parent [Member] |  |  |  |
Other Comprehensive Income (Loss), before Tax |  |  |  |
Other Comprehensive Income (Loss), before Tax |  | (0.2) | 0.1 | (0.2)
Other Comprehensive Income (Loss), Tax, Portion Attributable to Parent, Parenthetical Disclosures [Abstract] |  |  |  |
Other Comprehensive Income (Loss), Tax |  | 0.1 | (0.1) | 0.1
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent [Abstract] |  |  |  |
Other Comprehensive Income (Loss), Net of Tax |  | $ (0.1) | $ 0.0 | $ (0.1)

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