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Fair Value Measurements - Defined Benefit Plan Assets (Details) - USD ($) $ in Millions | Dec. 31, 2016 | Dec. 31, 2015 | Dec. 31, 2014
--- | --- | --- | ---
U.S. Plans: |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Defined Benefit Plan, Fair Value of Plan Assets | $ 229.5 | $ 235.8 | $ 265.6
Non-U.S. Plans: |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Defined Benefit Plan, Fair Value of Plan Assets | 393.8 | 395.1 | $ 395.6
Fair Value, Measurements, Recurring [Member] | U.S. Plans: |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Defined Benefit Plan, Fair Value of Plan Assets | 229.5 | 235.8 |
Fair Value, Measurements, Recurring [Member] | U.S. Plans: | Fair Value, Inputs, Level 1 [Member] |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Defined Benefit Plan, Fair Value of Plan Assets | 65.6 | 51.2 |
Fair Value, Measurements, Recurring [Member] | U.S. Plans: | Fair Value, Inputs, Level 2 [Member] |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Defined Benefit Plan, Fair Value of Plan Assets | 0.5 | 0.5 |
Fair Value, Measurements, Recurring [Member] | Non-U.S. Plans: |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Defined Benefit Plan, Fair Value of Plan Assets | 393.8 | 395.1 |
Fair Value, Measurements, Recurring [Member] | Non-U.S. Plans: | Fair Value, Inputs, Level 1 [Member] |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Defined Benefit Plan, Fair Value of Plan Assets | 87.1 | 82.9 |
Fixed Income Securities [Member] | Fair Value, Measurements, Recurring [Member] | U.S. Plans: |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Defined Benefit Plan, Fair Value of Plan Assets | 113.8 | 117.4 |
Fixed Income Securities [Member] | Fair Value, Measurements, Recurring [Member] | Non-U.S. Plans: |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Defined Benefit Plan, Fair Value of Plan Assets | 183.4 | 181.0 |
Equity Securities [Member] | Fair Value, Measurements, Recurring [Member] | U.S. Plans: |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Defined Benefit Plan, Fair Value of Plan Assets | 94.2 | 94.2 |
Equity Securities [Member] | Fair Value, Measurements, Recurring [Member] | Non-U.S. Plans: |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Defined Benefit Plan, Fair Value of Plan Assets | 190.8 | 194.7 |
Real estate and other | Fair Value, Measurements, Recurring [Member] | U.S. Plans: |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Defined Benefit Plan, Fair Value of Plan Assets | 21.5 | 24.2 |
Real estate and other | Fair Value, Measurements, Recurring [Member] | Non-U.S. Plans: |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Defined Benefit Plan, Fair Value of Plan Assets | 19.6 | 19.4 |
Market Approach Valuation Technique [Member] | Fixed Income Securities [Member] | Fair Value, Measurements, Recurring [Member] | U.S. Plans: | Fair Value, Inputs, Level 1 [Member] |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Defined Benefit Plan, Fair Value of Plan Assets | 15.3 | 14.3 |
Market Approach Valuation Technique [Member] | Fixed Income Securities [Member] | Fair Value, Measurements, Recurring [Member] | Non-U.S. Plans: | Fair Value, Inputs, Level 2 [Member] |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Defined Benefit Plan, Fair Value of Plan Assets |  |  |
Market Approach Valuation Technique [Member] | Equity Securities [Member] | Fair Value, Measurements, Recurring [Member] | U.S. Plans: | Fair Value, Inputs, Level 1 [Member] |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Defined Benefit Plan, Fair Value of Plan Assets | 37.2 | 36.9 |
Market Approach Valuation Technique [Member] | Equity Securities [Member] | Fair Value, Measurements, Recurring [Member] | Non-U.S. Plans: | Fair Value, Inputs, Level 1 [Member] |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Defined Benefit Plan, Fair Value of Plan Assets | 87.1 | 82.9 |
Market Approach Valuation Technique [Member] | Real estate and other | Fair Value, Measurements, Recurring [Member] | U.S. Plans: | Fair Value, Inputs, Level 1 [Member] |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Defined Benefit Plan, Fair Value of Plan Assets | 13.1 |  |
Market Approach Valuation Technique [Member] | Real estate and other | Fair Value, Measurements, Recurring [Member] | U.S. Plans: | Fair Value, Inputs, Level 2 [Member] |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Defined Benefit Plan, Fair Value of Plan Assets | 0.5 | 0.5 |
Net Asset Value [Member] | Fair Value, Measurements, Recurring [Member] | U.S. Plans: |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Defined Benefit Plan, Fair Value of Plan Assets | 163.4 | 184.1 |
Net Asset Value [Member] | Fair Value, Measurements, Recurring [Member] | Non-U.S. Plans: |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Defined Benefit Plan, Fair Value of Plan Assets | 306.7 | 312.2 |
Net Asset Value [Member] | Fixed Income Securities [Member] | Fair Value, Measurements, Recurring [Member] | U.S. Plans: |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Defined Benefit Plan, Fair Value of Plan Assets | 98.5 | 103.1 |
Net Asset Value [Member] | Fixed Income Securities [Member] | Fair Value, Measurements, Recurring [Member] | Non-U.S. Plans: |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Defined Benefit Plan, Fair Value of Plan Assets | 183.4 | 181.0 |
Net Asset Value [Member] | Equity Securities [Member] | Fair Value, Measurements, Recurring [Member] | U.S. Plans: |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Defined Benefit Plan, Fair Value of Plan Assets | 57.0 | 57.3 |
Net Asset Value [Member] | Equity Securities [Member] | Fair Value, Measurements, Recurring [Member] | Non-U.S. Plans: |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Defined Benefit Plan, Fair Value of Plan Assets | 103.7 | 111.8 |
Net Asset Value [Member] | Real estate and other | Fair Value, Measurements, Recurring [Member] | U.S. Plans: |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Defined Benefit Plan, Fair Value of Plan Assets | 7.9 | 23.7 |
Net Asset Value [Member] | Real estate and other | Fair Value, Measurements, Recurring [Member] | Non-U.S. Plans: |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Defined Benefit Plan, Fair Value of Plan Assets | $ 19.6 | $ 19.4 |

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