Retirement Plans and Other Investment Categories (Details 3) - USD ($) $ in Millions | Dec. 31, 2016 | Dec. 31, 2015 | Dec. 31, 2014 |
U.S. Pension Benefits | | | |
Defined Benefit Plan Disclosure [Line Items] | | | |
Total investments measured at fair value | $ 117.1 | $ 123.1 | $ 136.8 |
Defined Benefit Plan, Alternative Investments, Fair Value Of Plan Assets | 114.6 | 119.5 | |
U.S. Pension Benefits | Fair Value, Inputs, Level 1 | | | |
Defined Benefit Plan Disclosure [Line Items] | | | |
Total investments measured at fair value | 2.5 | 3.6 | |
U.S. Pension Benefits | Fair Value, Inputs, Level 2 | | | |
Defined Benefit Plan Disclosure [Line Items] | | | |
Total investments measured at fair value | 0 | 0 | |
U.S. Pension Benefits | Cash, including money market funds | | | |
Defined Benefit Plan Disclosure [Line Items] | | | |
Total investments measured at fair value | 2.5 | 3.6 | |
Defined Benefit Plan, Alternative Investments, Fair Value Of Plan Assets | 0 | 0 | |
U.S. Pension Benefits | Cash, including money market funds | Fair Value, Inputs, Level 1 | | | |
Defined Benefit Plan Disclosure [Line Items] | | | |
Total investments measured at fair value | 2.5 | 3.6 | |
U.S. Pension Benefits | Cash, including money market funds | Fair Value, Inputs, Level 2 | | | |
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 | 28.6 | 28.5 | |
Defined Benefit Plan, Alternative Investments, Fair Value Of Plan Assets | 28.6 | 28.5 | |
U.S. Pension Benefits | U.S. equities | Fair Value, Inputs, Level 1 | | | |
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 | | | |
Defined Benefit Plan Disclosure [Line Items] | | | |
Total investments measured at fair value | 0 | 0 | |
U.S. Pension Benefits | Non-U.S. equities | | | |
Defined Benefit Plan Disclosure [Line Items] | | | |
Total investments measured at fair value | 8.7 | 9.3 | |
Defined Benefit Plan, Alternative Investments, Fair Value Of Plan Assets | 8.7 | 9.3 | |
U.S. Pension Benefits | Non-U.S. equities | Fair Value, Inputs, Level 1 | | | |
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 | | | |
Defined Benefit Plan Disclosure [Line Items] | | | |
Total investments measured at fair value | 0 | 0 | |
U.S. Pension Benefits | U.S. corporate bonds | | | |
Defined Benefit Plan Disclosure [Line Items] | | | |
Total investments measured at fair value | 56.4 | 58.7 | |
Defined Benefit Plan, Alternative Investments, Fair Value Of Plan Assets | 56.4 | 58.7 | |
U.S. Pension Benefits | U.S. corporate bonds | Fair Value, Inputs, Level 1 | | | |
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 | | | |
Defined Benefit Plan Disclosure [Line Items] | | | |
Total investments measured at fair value | 0 | 0 | |
U.S. Pension Benefits | Non-U.S. corporate bonds | | | |
Defined Benefit Plan Disclosure [Line Items] | | | |
Total investments measured at fair value | 0 | 0 | |
Defined Benefit Plan, Alternative Investments, Fair Value Of Plan Assets | 0 | 0 | |
U.S. Pension Benefits | Non-U.S. corporate bonds | Fair Value, Inputs, Level 1 | | | |
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 | | | |
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 | 12.7 | 14 | |
Defined Benefit Plan, Alternative Investments, Fair Value Of Plan Assets | 12.7 | 14 | |
U.S. Pension Benefits | U.S. government securities | Fair Value, Inputs, Level 1 | | | |
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 | | | |
Defined Benefit Plan Disclosure [Line Items] | | | |
Total investments measured at fair value | 0 | 0 | |
U.S. Pension Benefits | Non-U.S. government securities | | | |
Defined Benefit Plan Disclosure [Line Items] | | | |
Total investments measured at fair value | 0.3 | 0.1 | |
Defined Benefit Plan, Alternative Investments, Fair Value Of Plan Assets | 0.3 | 0.1 | |
U.S. Pension Benefits | Non-U.S. government securities | Fair Value, Inputs, Level 1 | | | |
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 | | | |
Defined Benefit Plan Disclosure [Line Items] | | | |
Total investments measured at fair value | 0 | 0 | |
U.S. Pension Benefits | Real estate | | | |
Defined Benefit Plan Disclosure [Line Items] | | | |
Total investments measured at fair value | 0 | 0 | |
Defined Benefit Plan, Alternative Investments, Fair Value Of Plan Assets | 0 | 0 | |
U.S. Pension Benefits | Real estate | Fair Value, Inputs, Level 1 | | | |
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 | | | |
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 | 7.9 | 8.9 | |
Defined Benefit Plan, Alternative Investments, Fair Value Of Plan Assets | 7.9 | 8.9 | |
U.S. Pension Benefits | Other securities | Fair Value, Inputs, Level 1 | | | |
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 | | | |
Defined Benefit Plan Disclosure [Line Items] | | | |
Total investments measured at fair value | 0 | 0 | |
Non-U.S. Pension Benefits | | | |
Defined Benefit Plan Disclosure [Line Items] | | | |
Total investments measured at fair value | 108.3 | 111.2 | $ 119 |
Defined Benefit Plan, Alternative Investments, Fair Value Of Plan Assets | 0 | 0 | |
Non-U.S. Pension Benefits | Fair Value, Inputs, Level 1 | | | |
Defined Benefit Plan Disclosure [Line Items] | | | |
Total investments measured at fair value | 2.1 | 4.4 | |
Non-U.S. Pension Benefits | Fair Value, Inputs, Level 2 | | | |
Defined Benefit Plan Disclosure [Line Items] | | | |
Total investments measured at fair value | 106.2 | 106.8 | |
Non-U.S. Pension Benefits | Cash, including money market funds | | | |
Defined Benefit Plan Disclosure [Line Items] | | | |
Total investments measured at fair value | 2.1 | 4.4 | |
Defined Benefit Plan, Alternative Investments, Fair Value Of Plan Assets | 0 | 0 | |
Non-U.S. Pension Benefits | Cash, including money market funds | Fair Value, Inputs, Level 1 | | | |
Defined Benefit Plan Disclosure [Line Items] | | | |
Total investments measured at fair value | 2.1 | 4.4 | |
Non-U.S. Pension Benefits | Cash, including money market funds | Fair Value, Inputs, Level 2 | | | |
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 | 5.9 | 6.3 | |
Defined Benefit Plan, Alternative Investments, Fair Value Of Plan Assets | | 0 | |
Non-U.S. Pension Benefits | U.S. equities | Fair Value, Inputs, Level 1 | | | |
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 | | | |
Defined Benefit Plan Disclosure [Line Items] | | | |
Total investments measured at fair value | 5.9 | 6.3 | |
Non-U.S. Pension Benefits | Non-U.S. equities | | | |
Defined Benefit Plan Disclosure [Line Items] | | | |
Total investments measured at fair value | 21.2 | 21.7 | |
Defined Benefit Plan, Alternative Investments, Fair Value Of Plan Assets | 0 | 0 | |
Non-U.S. Pension Benefits | Non-U.S. equities | Fair Value, Inputs, Level 1 | | | |
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 | | | |
Defined Benefit Plan Disclosure [Line Items] | | | |
Total investments measured at fair value | 21.2 | 21.7 | |
Non-U.S. Pension Benefits | U.S. corporate bonds | | | |
Defined Benefit Plan Disclosure [Line Items] | | | |
Total investments measured at fair value | 0.9 | 0.1 | |
Defined Benefit Plan, Alternative Investments, Fair Value Of Plan Assets | 0 | 0 | |
Non-U.S. Pension Benefits | U.S. corporate bonds | Fair Value, Inputs, Level 1 | | | |
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 | | | |
Defined Benefit Plan Disclosure [Line Items] | | | |
Total investments measured at fair value | 0.9 | 0.1 | |
Non-U.S. Pension Benefits | Non-U.S. corporate bonds | | | |
Defined Benefit Plan Disclosure [Line Items] | | | |
Total investments measured at fair value | 17.7 | 20.3 | |
Defined Benefit Plan, Alternative Investments, Fair Value Of Plan Assets | 0 | 0 | |
Non-U.S. Pension Benefits | Non-U.S. corporate bonds | Fair Value, Inputs, Level 1 | | | |
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 | | | |
Defined Benefit Plan Disclosure [Line Items] | | | |
Total investments measured at fair value | 17.7 | 20.3 | |
Non-U.S. Pension Benefits | U.S. government securities | | | |
Defined Benefit Plan Disclosure [Line Items] | | | |
Total investments measured at fair value | 0.6 | 0 | |
Defined Benefit Plan, Alternative Investments, Fair Value Of Plan Assets | 0 | 0 | |
Non-U.S. Pension Benefits | U.S. government securities | Fair Value, Inputs, Level 1 | | | |
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 | | | |
Defined Benefit Plan Disclosure [Line Items] | | | |
Total investments measured at fair value | 0.6 | 0 | |
Non-U.S. Pension Benefits | Non-U.S. government securities | | | |
Defined Benefit Plan Disclosure [Line Items] | | | |
Total investments measured at fair value | 29.3 | 29.8 | |
Defined Benefit Plan, Alternative Investments, Fair Value Of Plan Assets | 0 | 0 | |
Non-U.S. Pension Benefits | Non-U.S. government securities | Fair Value, Inputs, Level 1 | | | |
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 | | | |
Defined Benefit Plan Disclosure [Line Items] | | | |
Total investments measured at fair value | 29.3 | 29.8 | |
Non-U.S. Pension Benefits | Real estate | | | |
Defined Benefit Plan Disclosure [Line Items] | | | |
Total investments measured at fair value | 2.8 | 3.4 | |
Defined Benefit Plan, Alternative Investments, Fair Value Of Plan Assets | 0 | 0 | |
Non-U.S. Pension Benefits | Real estate | Fair Value, Inputs, Level 1 | | | |
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 | | | |
Defined Benefit Plan Disclosure [Line Items] | | | |
Total investments measured at fair value | 2.8 | 3.4 | |
Non-U.S. Pension Benefits | Other securities | | | |
Defined Benefit Plan Disclosure [Line Items] | | | |
Total investments measured at fair value | 27.8 | 25.2 | |
Defined Benefit Plan, Alternative Investments, Fair Value Of Plan Assets | 0 | 0 | |
Non-U.S. Pension Benefits | Other securities | Fair Value, Inputs, Level 1 | | | |
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 | | | |
Defined Benefit Plan Disclosure [Line Items] | | | |
Total investments measured at fair value | 27.8 | 25.2 | |
Accounting Standards Update 2015-07 [Member] | U.S. Pension Benefits | | | |
Defined Benefit Plan Disclosure [Line Items] | | | |
Defined Benefit Plan, Alternative Investments, Fair Value Of Plan Assets | | $ 119.5 | |
Accounting Standards Update 2015-07 [Member] | U.S. Pension Benefits | Fair Value, Inputs, Level 2 | | | |
Defined Benefit Plan Disclosure [Line Items] | | | |
Total investments measured at fair value | $ (119.5) | | |