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Pension and Other Post Retirement Plans (Details 5) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]    
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Period Increase (Decrease) $ (0.3) $ (0.3)
Temporary Cash Investments [Member]    
Defined Benefit Plan Disclosure [Line Items]    
Defined Benefit Plan, Fair Value of Plan Assets 0.6 0.3
Collective Investment Trusts [Member]    
Defined Benefit Plan Disclosure [Line Items]    
Defined Benefit Plan, Fair Value of Plan Assets 95.8 104.4
Commingled Equity Bond Funds [Member]    
Defined Benefit Plan Disclosure [Line Items]    
Defined Benefit Plan, Fair Value of Plan Assets 1,243.2 1,310.9
Total [Member]    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]    
Beginning Fair Value 1,415.6  
Ending Fair Value 1,339.6 1,415.6
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] | Temporary Cash Investments [Member]    
Defined Benefit Plan Disclosure [Line Items]    
Defined Benefit Plan, Fair Value of Plan Assets 0.6 0.3
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] | Collective Investment Trusts [Member]    
Defined Benefit Plan Disclosure [Line Items]    
Defined Benefit Plan, Fair Value of Plan Assets 0.0 0.0
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] | Commingled Equity Bond Funds [Member]    
Defined Benefit Plan Disclosure [Line Items]    
Defined Benefit Plan, Fair Value of Plan Assets 0.0 0.0
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] | Total [Member]    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]    
Beginning Fair Value 0.3  
Ending Fair Value 0.6 0.3
Significant Other Observable Inputs (Level 2) [Member] | Temporary Cash Investments [Member]    
Defined Benefit Plan Disclosure [Line Items]    
Defined Benefit Plan, Fair Value of Plan Assets 0.0 0.0
Significant Other Observable Inputs (Level 2) [Member] | Collective Investment Trusts [Member]    
Defined Benefit Plan Disclosure [Line Items]    
Defined Benefit Plan, Fair Value of Plan Assets 90.2 99.1
Significant Other Observable Inputs (Level 2) [Member] | Commingled Equity Bond Funds [Member]    
Defined Benefit Plan Disclosure [Line Items]    
Defined Benefit Plan, Fair Value of Plan Assets 1,243.2 1,310.9
Significant Other Observable Inputs (Level 2) [Member] | Total [Member]    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]    
Beginning Fair Value 1,410.0  
Ending Fair Value 1,333.4 1,410.0
Significant Unobservable Inputs (Level 3) [Member] | Temporary Cash Investments [Member]    
Defined Benefit Plan Disclosure [Line Items]    
Defined Benefit Plan, Fair Value of Plan Assets 0.0 0.0
Significant Unobservable Inputs (Level 3) [Member] | Collective Investment Trusts [Member]    
Defined Benefit Plan Disclosure [Line Items]    
Defined Benefit Plan, Fair Value of Plan Assets 5.6 5.3
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]    
Beginning Fair Value 5.3 4.7
Purchases 0.0 0.1
Gain (loss) 0.6 0.8
Ending Fair Value 5.6 5.3
Significant Unobservable Inputs (Level 3) [Member] | Commingled Equity Bond Funds [Member]    
Defined Benefit Plan Disclosure [Line Items]    
Defined Benefit Plan, Fair Value of Plan Assets 0.0 0.0
Significant Unobservable Inputs (Level 3) [Member] | Total [Member]    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]    
Beginning Fair Value 5.3 4.7
Purchases 0.0 0.1
Gain (loss) 0.6 0.8
Ending Fair Value $ 5.6 $ 5.3