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Pension, Post-Retirement and Post-Employment Plans - Foreign Pension Plans (Details)
£ in Millions, $ in Millions
Oct. 13, 2014
GBP (£)
Dec. 31, 2016
USD ($)
Dec. 31, 2015
USD ($)
Dec. 31, 2014
USD ($)
Dec. 31, 2013
USD ($)
Foreign          
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]          
Projected benefit obligation   $ 3.1 $ 1.4 $ 0.3 $ 0.3
Net actuarial gain (loss)   1.1 (0.2) $ 0.0  
Other Current Liabilities | Foreign          
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]          
Projected benefit obligation   $ 5.1 $ 6.1    
Cash          
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]          
Weighted average asset allocation   5.00% 4.00%    
UK Pension Plan          
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]          
Benefit plan obligation transferred (in pounds) | £ £ 49.7        
Projected benefit obligation   $ 72.0 $ 85.8    
Net actuarial gain (loss)   $ 10.0      
UK Pension Plan | Insurance Buy-In Policy          
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]          
Weighted average asset allocation   92.00% 90.00%    
UK Pension Plan | Bond Funds          
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]          
Weighted average asset allocation   6.00% 9.00%    
UK Pension Plan | Cash          
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]          
Weighted average asset allocation   2.00% 1.00%