Pensions and Postretirement Benefits (Summary of Pension Plan Asset Allocation By Level) (Details) (USD $) In Millions, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Schedule of pension plans assets by level within the fair value hierarchy
Fair Value of Pension Plan	$ 125.4	$ 109.4
Common stock
Schedule of pension plans assets by level within the fair value hierarchy
Fair Value of Pension Plan	50.8	42.6
Equity Funds
Schedule of pension plans assets by level within the fair value hierarchy
Fair Value of Pension Plan	26.9	23.9
Foreign Stock
Schedule of pension plans assets by level within the fair value hierarchy
Fair Value of Pension Plan	5.6	4.1
U.S. Government obligations
Schedule of pension plans assets by level within the fair value hierarchy
Fair Value of Pension Plan	5.1	6.5
Fixed income funds
Schedule of pension plans assets by level within the fair value hierarchy
Fair Value of Pension Plan	18.8	17.1
Balanced funds
Schedule of pension plans assets by level within the fair value hierarchy
Fair Value of Pension Plan	2.1	0
Corporate Bonds
Schedule of pension plans assets by level within the fair value hierarchy
Fair Value of Pension Plan	6.8	6.8
Cash and Cash Equivalents
Schedule of pension plans assets by level within the fair value hierarchy
Fair Value of Pension Plan	2.0	2.0
Hedge funds
Schedule of pension plans assets by level within the fair value hierarchy
Fair Value of Pension Plan	7.3	6.4	5.9
Level 1
Schedule of pension plans assets by level within the fair value hierarchy
Fair Value of Pension Plan	115.6	100.5
Level 1 | Common stock
Schedule of pension plans assets by level within the fair value hierarchy
Fair Value of Pension Plan	48.3	40.1
Level 1 | Equity Funds
Schedule of pension plans assets by level within the fair value hierarchy
Fair Value of Pension Plan	26.9	23.9
Level 1 | Foreign Stock
Schedule of pension plans assets by level within the fair value hierarchy
Fair Value of Pension Plan	5.6	4.1
Level 1 | U.S. Government obligations
Schedule of pension plans assets by level within the fair value hierarchy
Fair Value of Pension Plan	5.1	6.5
Level 1 | Fixed income funds
Schedule of pension plans assets by level within the fair value hierarchy
Fair Value of Pension Plan	18.8	17.1
Level 1 | Balanced funds
Schedule of pension plans assets by level within the fair value hierarchy
Fair Value of Pension Plan	2.1	0
Level 1 | Corporate Bonds
Schedule of pension plans assets by level within the fair value hierarchy
Fair Value of Pension Plan	6.8	6.8
Level 1 | Cash and Cash Equivalents
Schedule of pension plans assets by level within the fair value hierarchy
Fair Value of Pension Plan	2.0	2.0
Level 1 | Hedge funds
Schedule of pension plans assets by level within the fair value hierarchy
Fair Value of Pension Plan	0	0
Level 2
Schedule of pension plans assets by level within the fair value hierarchy
Fair Value of Pension Plan	2.5	2.5
Level 2 | Common stock
Schedule of pension plans assets by level within the fair value hierarchy
Fair Value of Pension Plan	2.5	2.5
Level 2 | Equity Funds
Schedule of pension plans assets by level within the fair value hierarchy
Fair Value of Pension Plan	0	0
Level 2 | Foreign Stock
Schedule of pension plans assets by level within the fair value hierarchy
Fair Value of Pension Plan	0	0
Level 2 | U.S. Government obligations
Schedule of pension plans assets by level within the fair value hierarchy
Fair Value of Pension Plan	0	0
Level 2 | Fixed income funds
Schedule of pension plans assets by level within the fair value hierarchy
Fair Value of Pension Plan	0	0
Level 2 | Balanced funds
Schedule of pension plans assets by level within the fair value hierarchy
Fair Value of Pension Plan	0	0
Level 2 | Corporate Bonds
Schedule of pension plans assets by level within the fair value hierarchy
Fair Value of Pension Plan	0	0
Level 2 | Cash and Cash Equivalents
Schedule of pension plans assets by level within the fair value hierarchy
Fair Value of Pension Plan	0	0
Level 2 | Hedge funds
Schedule of pension plans assets by level within the fair value hierarchy
Fair Value of Pension Plan	0	0
Level 3
Schedule of pension plans assets by level within the fair value hierarchy
Fair Value of Pension Plan	7.3	6.4
Level 3 | Common stock
Schedule of pension plans assets by level within the fair value hierarchy
Fair Value of Pension Plan	0	0
Level 3 | Equity Funds
Schedule of pension plans assets by level within the fair value hierarchy
Fair Value of Pension Plan	0	0
Level 3 | Foreign Stock
Schedule of pension plans assets by level within the fair value hierarchy
Fair Value of Pension Plan	0	0
Level 3 | U.S. Government obligations
Schedule of pension plans assets by level within the fair value hierarchy
Fair Value of Pension Plan	0	0
Level 3 | Fixed income funds
Schedule of pension plans assets by level within the fair value hierarchy
Fair Value of Pension Plan	0	0
Level 3 | Balanced funds
Schedule of pension plans assets by level within the fair value hierarchy
Fair Value of Pension Plan	0	0
Level 3 | Corporate Bonds
Schedule of pension plans assets by level within the fair value hierarchy
Fair Value of Pension Plan	0	0
Level 3 | Cash and Cash Equivalents
Schedule of pension plans assets by level within the fair value hierarchy
Fair Value of Pension Plan	0	0
Level 3 | Hedge funds
Schedule of pension plans assets by level within the fair value hierarchy
Fair Value of Pension Plan	$ 7.3	$ 6.4