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Pensions - Additional Information (Details) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2016 | Mar. 31, 2016 | Sep. 30, 2015 | Sep. 30, 2016 | Sep. 30, 2015
Defined Benefit Plan Disclosure [Line Items] |  |  |  |  |
Payments for repurchase of common stock |  |  |  | $ 33.8 | $ 10.6
Actuarial losses recognized |  | $ 0.4 |  |  |
Common Stock |  |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |  |
Payments for repurchase of common stock |  |  |  | 3.6 |
U.S. Benefit Plan |  |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |  |
Defined Benefit Plan, Contributions by Employer |  |  |  | 5.6 | 5.5
Actuarial losses recognized | $ 1.4 |  | $ 1.7 | 4.2 | 5.1
Non-U.S. Benefit Plan |  |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |  |
Defined Benefit Plan, Contributions by Employer |  |  |  | 1.0 | 1.1
Estimated future employer contributions in current year |  |  |  | 0.4 |
Actuarial losses recognized | $ 0.2 |  | $ 0.1 | $ 0.5 | $ 0.5

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