Pensions and Postretirement Benefits (Assets by fair value hierarchy) (Details) - USD ($) $ in Millions | 12 Months Ended |
Dec. 31, 2015 | Dec. 31, 2014 |
Defined Benefit Plan Disclosure [Line Items] | | |
Fair value of plan assets | $ 125.7 | $ 125.7 |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] | | |
Fair value of plan assets at beginning of year | 125.7 | |
Fair value of plan assets at end of year | 117.3 | 125.7 |
Level 1 | | |
Defined Benefit Plan Disclosure [Line Items] | | |
Fair value of plan assets | 115.9 | 115.9 |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] | | |
Fair value of plan assets at beginning of year | 115.9 | |
Fair value of plan assets at end of year | 103.1 | 115.9 |
Level 2 | | |
Defined Benefit Plan Disclosure [Line Items] | | |
Fair value of plan assets | 2.2 | 2.2 |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] | | |
Fair value of plan assets at beginning of year | 2.2 | |
Fair value of plan assets at end of year | 1.5 | 2.2 |
Level 3 | | |
Defined Benefit Plan Disclosure [Line Items] | | |
Fair value of plan assets | 7.6 | 7.6 |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] | | |
Fair value of plan assets at beginning of year | 7.6 | |
Fair value of plan assets at end of year | 12.7 | 7.6 |
Common Stock | | |
Defined Benefit Plan Disclosure [Line Items] | | |
Fair value of plan assets | 47.8 | 47.8 |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] | | |
Fair value of plan assets at beginning of year | 47.8 | |
Fair value of plan assets at end of year | 39.8 | 47.8 |
Common Stock | Level 1 | | |
Defined Benefit Plan Disclosure [Line Items] | | |
Fair value of plan assets | 45.6 | 45.6 |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] | | |
Fair value of plan assets at beginning of year | 45.6 | |
Fair value of plan assets at end of year | 38.3 | 45.6 |
Common Stock | Level 2 | | |
Defined Benefit Plan Disclosure [Line Items] | | |
Fair value of plan assets | 2.2 | 2.2 |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] | | |
Fair value of plan assets at beginning of year | 2.2 | |
Fair value of plan assets at end of year | 1.5 | 2.2 |
Common Stock | Level 3 | | |
Defined Benefit Plan Disclosure [Line Items] | | |
Fair value of plan assets | 0 | 0 |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] | | |
Fair value of plan assets at beginning of year | 0 | |
Fair value of plan assets at end of year | 0 | 0 |
Equity Funds | | |
Defined Benefit Plan Disclosure [Line Items] | | |
Fair value of plan assets | 29 | 29 |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] | | |
Fair value of plan assets at beginning of year | 29 | |
Fair value of plan assets at end of year | 29.1 | 29 |
Equity Funds | Level 1 | | |
Defined Benefit Plan Disclosure [Line Items] | | |
Fair value of plan assets | 29 | 29 |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] | | |
Fair value of plan assets at beginning of year | 29 | |
Fair value of plan assets at end of year | 29.1 | 29 |
Equity Funds | Level 2 | | |
Defined Benefit Plan Disclosure [Line Items] | | |
Fair value of plan assets | 0 | 0 |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] | | |
Fair value of plan assets at beginning of year | 0 | |
Fair value of plan assets at end of year | 0 | 0 |
Equity Funds | Level 3 | | |
Defined Benefit Plan Disclosure [Line Items] | | |
Fair value of plan assets | 0 | 0 |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] | | |
Fair value of plan assets at beginning of year | 0 | |
Fair value of plan assets at end of year | 0 | 0 |
Foreign Stock | | |
Defined Benefit Plan Disclosure [Line Items] | | |
Fair value of plan assets | 5.4 | 5.4 |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] | | |
Fair value of plan assets at beginning of year | 5.4 | |
Fair value of plan assets at end of year | 5.7 | 5.4 |
Foreign Stock | Level 1 | | |
Defined Benefit Plan Disclosure [Line Items] | | |
Fair value of plan assets | 5.4 | 5.4 |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] | | |
Fair value of plan assets at beginning of year | 5.4 | |
Fair value of plan assets at end of year | 5.7 | 5.4 |
Foreign Stock | Level 2 | | |
Defined Benefit Plan Disclosure [Line Items] | | |
Fair value of plan assets | 0 | 0 |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] | | |
Fair value of plan assets at beginning of year | 0 | |
Fair value of plan assets at end of year | 0 | 0 |
Foreign Stock | Level 3 | | |
Defined Benefit Plan Disclosure [Line Items] | | |
Fair value of plan assets | 0 | 0 |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] | | |
Fair value of plan assets at beginning of year | 0 | |
Fair value of plan assets at end of year | 0 | 0 |
U.S. Government obligations | | |
Defined Benefit Plan Disclosure [Line Items] | | |
Fair value of plan assets | 7 | 7 |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] | | |
Fair value of plan assets at beginning of year | 7 | |
Fair value of plan assets at end of year | 7.4 | 7 |
U.S. Government obligations | Level 1 | | |
Defined Benefit Plan Disclosure [Line Items] | | |
Fair value of plan assets | 7 | 7 |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] | | |
Fair value of plan assets at beginning of year | 7 | |
Fair value of plan assets at end of year | 7.4 | 7 |
U.S. Government obligations | Level 2 | | |
Defined Benefit Plan Disclosure [Line Items] | | |
Fair value of plan assets | 0 | 0 |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] | | |
Fair value of plan assets at beginning of year | 0 | |
Fair value of plan assets at end of year | 0 | 0 |
U.S. Government obligations | Level 3 | | |
Defined Benefit Plan Disclosure [Line Items] | | |
Fair value of plan assets | 0 | 0 |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] | | |
Fair value of plan assets at beginning of year | 0 | |
Fair value of plan assets at end of year | 0 | 0 |
Fixed Income Funds | | |
Defined Benefit Plan Disclosure [Line Items] | | |
Fair value of plan assets | 19.6 | 19.6 |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] | | |
Fair value of plan assets at beginning of year | 19.6 | |
Fair value of plan assets at end of year | 14.6 | 19.6 |
Fixed Income Funds | Level 1 | | |
Defined Benefit Plan Disclosure [Line Items] | | |
Fair value of plan assets | 19.6 | 19.6 |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] | | |
Fair value of plan assets at beginning of year | 19.6 | |
Fair value of plan assets at end of year | 14.6 | 19.6 |
Fixed Income Funds | Level 2 | | |
Defined Benefit Plan Disclosure [Line Items] | | |
Fair value of plan assets | 0 | 0 |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] | | |
Fair value of plan assets at beginning of year | 0 | |
Fair value of plan assets at end of year | 0 | 0 |
Fixed Income Funds | Level 3 | | |
Defined Benefit Plan Disclosure [Line Items] | | |
Fair value of plan assets | 0 | 0 |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] | | |
Fair value of plan assets at beginning of year | 0 | |
Fair value of plan assets at end of year | 0 | 0 |
Corporate Bonds | | |
Defined Benefit Plan Disclosure [Line Items] | | |
Fair value of plan assets | 7.5 | 7.5 |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] | | |
Fair value of plan assets at beginning of year | 7.5 | |
Fair value of plan assets at end of year | 6.8 | 7.5 |
Corporate Bonds | Level 1 | | |
Defined Benefit Plan Disclosure [Line Items] | | |
Fair value of plan assets | 7.5 | 7.5 |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] | | |
Fair value of plan assets at beginning of year | 7.5 | |
Fair value of plan assets at end of year | 6.8 | 7.5 |
Corporate Bonds | Level 2 | | |
Defined Benefit Plan Disclosure [Line Items] | | |
Fair value of plan assets | 0 | 0 |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] | | |
Fair value of plan assets at beginning of year | 0 | |
Fair value of plan assets at end of year | 0 | 0 |
Corporate Bonds | Level 3 | | |
Defined Benefit Plan Disclosure [Line Items] | | |
Fair value of plan assets | 0 | 0 |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] | | |
Fair value of plan assets at beginning of year | 0 | |
Fair value of plan assets at end of year | 0 | 0 |
Cash and Cash Equivalents | | |
Defined Benefit Plan Disclosure [Line Items] | | |
Fair value of plan assets | 1.8 | 1.8 |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] | | |
Fair value of plan assets at beginning of year | 1.8 | |
Fair value of plan assets at end of year | 1.2 | 1.8 |
Cash and Cash Equivalents | Level 1 | | |
Defined Benefit Plan Disclosure [Line Items] | | |
Fair value of plan assets | 1.8 | 1.8 |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] | | |
Fair value of plan assets at beginning of year | 1.8 | |
Fair value of plan assets at end of year | 1.2 | 1.8 |
Cash and Cash Equivalents | Level 2 | | |
Defined Benefit Plan Disclosure [Line Items] | | |
Fair value of plan assets | 0 | 0 |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] | | |
Fair value of plan assets at beginning of year | 0 | |
Fair value of plan assets at end of year | 0 | 0 |
Cash and Cash Equivalents | Level 3 | | |
Defined Benefit Plan Disclosure [Line Items] | | |
Fair value of plan assets | 0 | 0 |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] | | |
Fair value of plan assets at beginning of year | 0 | |
Fair value of plan assets at end of year | 0 | 0 |
Hedge Funds | | |
Defined Benefit Plan Disclosure [Line Items] | | |
Fair value of plan assets | 7.6 | 7.3 |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] | | |
Fair value of plan assets at beginning of year | 7.6 | 7.3 |
Net Unrealized Gain | 0.1 | 0.3 |
Purchases | 5 | 0 |
Fair value of plan assets at end of year | 12.7 | 7.6 |
Hedge Funds | Level 1 | | |
Defined Benefit Plan Disclosure [Line Items] | | |
Fair value of plan assets | 0 | 0 |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] | | |
Fair value of plan assets at beginning of year | 0 | |
Fair value of plan assets at end of year | 0 | 0 |
Hedge Funds | Level 2 | | |
Defined Benefit Plan Disclosure [Line Items] | | |
Fair value of plan assets | 0 | 0 |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] | | |
Fair value of plan assets at beginning of year | 0 | |
Fair value of plan assets at end of year | 0 | 0 |
Hedge Funds | Level 3 | | |
Defined Benefit Plan Disclosure [Line Items] | | |
Fair value of plan assets | 7.6 | 7.6 |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] | | |
Fair value of plan assets at beginning of year | 7.6 | |
Fair value of plan assets at end of year | $ 12.7 | $ 7.6 |