Retirement Plans and Other Investment Categories (Details 3) (USD $) | Dec. 31, 2014 | Dec. 31, 2013 | Dec. 31, 2012 |
In Millions, unless otherwise specified |
U.S. Pension Benefits | | | |
Defined Benefit Plan Disclosure [Line Items] | | | |
Total investments measured at fair value | $136.80 | $125.80 | $123.60 |
U.S. Pension Benefits | Fair Value, Inputs, Level 1 [Member] | | | |
Defined Benefit Plan Disclosure [Line Items] | | | |
Total investments measured at fair value | 6 | 9.4 | |
U.S. Pension Benefits | Fair Value, Inputs, Level 2 [Member] | | | |
Defined Benefit Plan Disclosure [Line Items] | | | |
Total investments measured at fair value | 130.8 | 116.4 | |
U.S. Pension Benefits | Cash, including money market funds | | | |
Defined Benefit Plan Disclosure [Line Items] | | | |
Total investments measured at fair value | 6 | 9.4 | |
U.S. Pension Benefits | Cash, including money market funds | Fair Value, Inputs, Level 1 [Member] | | | |
Defined Benefit Plan Disclosure [Line Items] | | | |
Total investments measured at fair value | 6 | 9.4 | |
U.S. Pension Benefits | Cash, including money market funds | Fair Value, Inputs, Level 2 [Member] | | | |
Defined Benefit Plan Disclosure [Line Items] | | | |
Total investments measured at fair value | 0 | 0 | |
U.S. Pension Benefits | U.S. equities | | | |
Defined Benefit Plan Disclosure [Line Items] | | | |
Total investments measured at fair value | 31 | 25 | |
U.S. Pension Benefits | U.S. equities | Fair Value, Inputs, Level 1 [Member] | | | |
Defined Benefit Plan Disclosure [Line Items] | | | |
Total investments measured at fair value | 0 | 0 | |
U.S. Pension Benefits | U.S. equities | Fair Value, Inputs, Level 2 [Member] | | | |
Defined Benefit Plan Disclosure [Line Items] | | | |
Total investments measured at fair value | 31 | 25 | |
U.S. Pension Benefits | Non-U.S. equities | | | |
Defined Benefit Plan Disclosure [Line Items] | | | |
Total investments measured at fair value | 10 | 10.2 | |
U.S. Pension Benefits | Non-U.S. equities | Fair Value, Inputs, Level 1 [Member] | | | |
Defined Benefit Plan Disclosure [Line Items] | | | |
Total investments measured at fair value | 0 | 0 | |
U.S. Pension Benefits | Non-U.S. equities | Fair Value, Inputs, Level 2 [Member] | | | |
Defined Benefit Plan Disclosure [Line Items] | | | |
Total investments measured at fair value | 10 | 10.2 | |
U.S. Pension Benefits | U.S. corporate bonds | | | |
Defined Benefit Plan Disclosure [Line Items] | | | |
Total investments measured at fair value | 63.8 | 56.9 | |
U.S. Pension Benefits | U.S. corporate bonds | Fair Value, Inputs, Level 1 [Member] | | | |
Defined Benefit Plan Disclosure [Line Items] | | | |
Total investments measured at fair value | 0 | 0 | |
U.S. Pension Benefits | U.S. corporate bonds | Fair Value, Inputs, Level 2 [Member] | | | |
Defined Benefit Plan Disclosure [Line Items] | | | |
Total investments measured at fair value | 63.8 | 56.9 | |
U.S. Pension Benefits | Non-U.S. corporate bonds | | | |
Defined Benefit Plan Disclosure [Line Items] | | | |
Total investments measured at fair value | 0 | 0 | |
U.S. Pension Benefits | Non-U.S. corporate bonds | Fair Value, Inputs, Level 1 [Member] | | | |
Defined Benefit Plan Disclosure [Line Items] | | | |
Total investments measured at fair value | 0 | 0 | |
U.S. Pension Benefits | Non-U.S. corporate bonds | Fair Value, Inputs, Level 2 [Member] | | | |
Defined Benefit Plan Disclosure [Line Items] | | | |
Total investments measured at fair value | 0 | 0 | |
U.S. Pension Benefits | U.S. government securities | | | |
Defined Benefit Plan Disclosure [Line Items] | | | |
Total investments measured at fair value | 15.3 | 18.1 | |
U.S. Pension Benefits | U.S. government securities | Fair Value, Inputs, Level 1 [Member] | | | |
Defined Benefit Plan Disclosure [Line Items] | | | |
Total investments measured at fair value | 0 | 0 | |
U.S. Pension Benefits | U.S. government securities | Fair Value, Inputs, Level 2 [Member] | | | |
Defined Benefit Plan Disclosure [Line Items] | | | |
Total investments measured at fair value | 15.3 | 18.1 | |
U.S. Pension Benefits | Non-U.S. government securities | | | |
Defined Benefit Plan Disclosure [Line Items] | | | |
Total investments measured at fair value | 0.9 | 0.8 | |
U.S. Pension Benefits | Non-U.S. government securities | Fair Value, Inputs, Level 1 [Member] | | | |
Defined Benefit Plan Disclosure [Line Items] | | | |
Total investments measured at fair value | 0 | 0 | |
U.S. Pension Benefits | Non-U.S. government securities | Fair Value, Inputs, Level 2 [Member] | | | |
Defined Benefit Plan Disclosure [Line Items] | | | |
Total investments measured at fair value | 0.9 | 0.8 | |
U.S. Pension Benefits | Real estate | | | |
Defined Benefit Plan Disclosure [Line Items] | | | |
Total investments measured at fair value | 0 | 0 | |
U.S. Pension Benefits | Real estate | Fair Value, Inputs, Level 1 [Member] | | | |
Defined Benefit Plan Disclosure [Line Items] | | | |
Total investments measured at fair value | 0 | 0 | |
U.S. Pension Benefits | Real estate | Fair Value, Inputs, Level 2 [Member] | | | |
Defined Benefit Plan Disclosure [Line Items] | | | |
Total investments measured at fair value | 0 | 0 | |
U.S. Pension Benefits | Other securities | | | |
Defined Benefit Plan Disclosure [Line Items] | | | |
Total investments measured at fair value | 9.8 | 5.4 | |
U.S. Pension Benefits | Other securities | Fair Value, Inputs, Level 1 [Member] | | | |
Defined Benefit Plan Disclosure [Line Items] | | | |
Total investments measured at fair value | 0 | 0 | |
U.S. Pension Benefits | Other securities | Fair Value, Inputs, Level 2 [Member] | | | |
Defined Benefit Plan Disclosure [Line Items] | | | |
Total investments measured at fair value | 9.8 | 5.4 | |
Non-U.S. Pension Benefits | | | |
Defined Benefit Plan Disclosure [Line Items] | | | |
Total investments measured at fair value | 146.8 | 141.9 | 132.5 |
Non-U.S. Pension Benefits | Fair Value, Inputs, Level 1 [Member] | | | |
Defined Benefit Plan Disclosure [Line Items] | | | |
Total investments measured at fair value | 4.3 | 3.5 | |
Non-U.S. Pension Benefits | Fair Value, Inputs, Level 2 [Member] | | | |
Defined Benefit Plan Disclosure [Line Items] | | | |
Total investments measured at fair value | 142.5 | 138.4 | |
Non-U.S. Pension Benefits | Cash, including money market funds | | | |
Defined Benefit Plan Disclosure [Line Items] | | | |
Total investments measured at fair value | 4.3 | 3.5 | |
Non-U.S. Pension Benefits | Cash, including money market funds | Fair Value, Inputs, Level 1 [Member] | | | |
Defined Benefit Plan Disclosure [Line Items] | | | |
Total investments measured at fair value | 4.3 | 3.5 | |
Non-U.S. Pension Benefits | Cash, including money market funds | Fair Value, Inputs, Level 2 [Member] | | | |
Defined Benefit Plan Disclosure [Line Items] | | | |
Total investments measured at fair value | 0 | 0 | |
Non-U.S. Pension Benefits | U.S. equities | | | |
Defined Benefit Plan Disclosure [Line Items] | | | |
Total investments measured at fair value | 9.3 | 8.4 | |
Non-U.S. Pension Benefits | U.S. equities | Fair Value, Inputs, Level 1 [Member] | | | |
Defined Benefit Plan Disclosure [Line Items] | | | |
Total investments measured at fair value | 0 | 0 | |
Non-U.S. Pension Benefits | U.S. equities | Fair Value, Inputs, Level 2 [Member] | | | |
Defined Benefit Plan Disclosure [Line Items] | | | |
Total investments measured at fair value | 9.3 | 8.4 | |
Non-U.S. Pension Benefits | Non-U.S. equities | | | |
Defined Benefit Plan Disclosure [Line Items] | | | |
Total investments measured at fair value | 34.4 | 35 | |
Non-U.S. Pension Benefits | Non-U.S. equities | Fair Value, Inputs, Level 1 [Member] | | | |
Defined Benefit Plan Disclosure [Line Items] | | | |
Total investments measured at fair value | 0 | 0 | |
Non-U.S. Pension Benefits | Non-U.S. equities | Fair Value, Inputs, Level 2 [Member] | | | |
Defined Benefit Plan Disclosure [Line Items] | | | |
Total investments measured at fair value | 34.4 | 35 | |
Non-U.S. Pension Benefits | U.S. corporate bonds | | | |
Defined Benefit Plan Disclosure [Line Items] | | | |
Total investments measured at fair value | 1.1 | 1 | |
Non-U.S. Pension Benefits | U.S. corporate bonds | Fair Value, Inputs, Level 1 [Member] | | | |
Defined Benefit Plan Disclosure [Line Items] | | | |
Total investments measured at fair value | 0 | 0 | |
Non-U.S. Pension Benefits | U.S. corporate bonds | Fair Value, Inputs, Level 2 [Member] | | | |
Defined Benefit Plan Disclosure [Line Items] | | | |
Total investments measured at fair value | 1.1 | 1 | |
Non-U.S. Pension Benefits | Non-U.S. corporate bonds | | | |
Defined Benefit Plan Disclosure [Line Items] | | | |
Total investments measured at fair value | 29.8 | 28 | |
Non-U.S. Pension Benefits | Non-U.S. corporate bonds | Fair Value, Inputs, Level 1 [Member] | | | |
Defined Benefit Plan Disclosure [Line Items] | | | |
Total investments measured at fair value | 0 | 0 | |
Non-U.S. Pension Benefits | Non-U.S. corporate bonds | Fair Value, Inputs, Level 2 [Member] | | | |
Defined Benefit Plan Disclosure [Line Items] | | | |
Total investments measured at fair value | 29.8 | 28 | |
Non-U.S. Pension Benefits | U.S. government securities | | | |
Defined Benefit Plan Disclosure [Line Items] | | | |
Total investments measured at fair value | 0.6 | 0.1 | |
Non-U.S. Pension Benefits | U.S. government securities | Fair Value, Inputs, Level 1 [Member] | | | |
Defined Benefit Plan Disclosure [Line Items] | | | |
Total investments measured at fair value | 0 | 0 | |
Non-U.S. Pension Benefits | U.S. government securities | Fair Value, Inputs, Level 2 [Member] | | | |
Defined Benefit Plan Disclosure [Line Items] | | | |
Total investments measured at fair value | 0.6 | 0.1 | |
Non-U.S. Pension Benefits | Non-U.S. government securities | | | |
Defined Benefit Plan Disclosure [Line Items] | | | |
Total investments measured at fair value | 44.2 | 42.7 | |
Non-U.S. Pension Benefits | Non-U.S. government securities | Fair Value, Inputs, Level 1 [Member] | | | |
Defined Benefit Plan Disclosure [Line Items] | | | |
Total investments measured at fair value | 0 | 0 | |
Non-U.S. Pension Benefits | Non-U.S. government securities | Fair Value, Inputs, Level 2 [Member] | | | |
Defined Benefit Plan Disclosure [Line Items] | | | |
Total investments measured at fair value | 44.2 | 42.7 | |
Non-U.S. Pension Benefits | Real estate | | | |
Defined Benefit Plan Disclosure [Line Items] | | | |
Total investments measured at fair value | 8.8 | 9 | |
Non-U.S. Pension Benefits | Real estate | Fair Value, Inputs, Level 1 [Member] | | | |
Defined Benefit Plan Disclosure [Line Items] | | | |
Total investments measured at fair value | 0 | 0 | |
Non-U.S. Pension Benefits | Real estate | Fair Value, Inputs, Level 2 [Member] | | | |
Defined Benefit Plan Disclosure [Line Items] | | | |
Total investments measured at fair value | 8.8 | 9 | |
Non-U.S. Pension Benefits | Other securities | | | |
Defined Benefit Plan Disclosure [Line Items] | | | |
Total investments measured at fair value | 14.3 | 14.2 | |
Non-U.S. Pension Benefits | Other securities | Fair Value, Inputs, Level 1 [Member] | | | |
Defined Benefit Plan Disclosure [Line Items] | | | |
Total investments measured at fair value | 0 | 0 | |
Non-U.S. Pension Benefits | Other securities | Fair Value, Inputs, Level 2 [Member] | | | |
Defined Benefit Plan Disclosure [Line Items] | | | |
Total investments measured at fair value | $14.30 | $14.20 | |