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Retirement Plans and Post Retirement Benefits Level 3 Rollforward (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2015 | Dec. 31, 2014
Assets Measured at Fair Value on a Recurring Basis Using Significant Unobservable Inputs (Level 3) [Roll Forward] |  |  |  |
Fair value of plan assets, beginning of year balance |  | $ 268.0 |  | $ 270.3
Fair value of plan assets, end of year balance |  | 237.4 |  | 268.0
Multi-strategy Funds |  |  |  |
Assets Measured at Fair Value on a Recurring Basis Using Significant Unobservable Inputs (Level 3) [Roll Forward] |  |  |  |
Fair value of plan assets, beginning of year balance | [1] | 26.1 |  |
Fair value of plan assets, end of year balance | [1] | 84.2 |  | 26.1
Significant Unobservable Inputs (Level 3) |  |  |  |
Assets Measured at Fair Value on a Recurring Basis Using Significant Unobservable Inputs (Level 3) [Roll Forward] |  |  |  |
Fair value of plan assets, beginning of year balance |  | 26.1 |  | 41.7
Total unrealized gains (losses) |  |  |  | 0.8
Defined Benefit Plan, Redemptions |  | (13.0) |  | (16.5)
Fair value of plan assets, end of year balance |  | 13.3 |  | 26.1
Defined Benefit Plan, Mangement Fees |  | 0.2 |  | 0.1
Significant Unobservable Inputs (Level 3) | Multi-strategy Funds |  |  |  |
Assets Measured at Fair Value on a Recurring Basis Using Significant Unobservable Inputs (Level 3) [Roll Forward] |  |  |  |
Fair value of plan assets, beginning of year balance |  | 26.1 | [1] | 25.2
Total unrealized gains (losses) |  |  |  | 0.8
Defined Benefit Plan, Redemptions |  | (13.0) |  | 0.0
Fair value of plan assets, end of year balance | [1] | 13.3 |  | 26.1
Defined Benefit Plan, Mangement Fees |  | 0.2 |  | 0.1
Significant Unobservable Inputs (Level 3) | Real Estate |  |  |  |
Assets Measured at Fair Value on a Recurring Basis Using Significant Unobservable Inputs (Level 3) [Roll Forward] |  |  |  |
Fair value of plan assets, beginning of year balance |  | 0.0 |  | 16.5
Defined Benefit Plan, Redemptions |  | 0.0 |  | 16.5
Fair value of plan assets, end of year balance |  | $ 0.0 |  | $ 0.0
[1] | The multi-strategy funds invest in various hedge funds that employ a fund of funds strategy.

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- Definition Defined Benefit Plan, Mangement Fees + References No definition available. + Details
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- Definition Actual return on plan assets, separately identifying the amount related to assets still held at the reporting date. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (d)(iv)(02)(A) -URI http://asc.fasb.org/extlink&oid=58740216&loc=d3e1928-114920 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 5 -Subparagraph (c)(iv)(02)(A) -URI http://asc.fasb.org/extlink&oid=58740216&loc=d3e2446-114920 + Details
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- Definition A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period. + References No definition available. + Details
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- Definition Assets, usually stocks, bonds, and other investments, that have been segregated and restricted (usually in a trust) to provide benefits, at their fair value as of the measurement date. Plan assets include amounts contributed by the employer (and by employees for a contributory plan) and amounts earned from investing the contributions, less benefits paid. If a plan has liabilities other than for benefits, those non-benefit obligations may be considered as reductions of plan assets. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 30 -Section 35 -Paragraph 50 -URI http://asc.fasb.org/extlink&oid=49178875&loc=d3e12355-114930 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=58740216&loc=d3e1928-114920 + Details
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