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Employee Benefit Plans - Reconciliation of the Changes in Benefit Obligation, the Changes in Plan Assets, and the Funded Status (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Change in Plan Assets      
Fair value of plan assets, beginning of year $ 150.4    
Fair value of plan assets, end of year 161.3 $ 150.4  
U.S. Pension Plans      
Change in Benefit Obligation      
Benefit obligation, beginning of year 155.6 218.5  
Distribution of MFS 0.0 (62.4)  
Service cost 0.0 0.0 $ 0.0
Interest cost 5.3 6.8 9.4
Participant contributions 0.0 0.0  
Medicare subsidies received 0.0 0.0  
Plan amendments 0.0 0.0  
Net transfer out 0.0 0.0  
Actuarial (gain) loss 10.0 0.9  
Currency translation adjustment 0.0 0.0  
Benefits paid (8.6) (8.2)  
Benefit obligation, end of year 162.3 155.6 218.5
Change in Plan Assets      
Fair value of plan assets, beginning of year 108.6 143.9  
Distribution of MFS 0.0 (34.1)  
Actual return on plan assets 11.5 6.4  
Employer contributions 4.7 0.6  
Participant contributions 0.0 0.0  
Medicare subsidies received 0.0 0.0  
Currency translation adjustment 0.0 0.0  
Net transfer out 0.0 0.0  
Benefits paid (8.6) (8.2)  
Fair value of plan assets, end of year 116.2 108.6 $ 143.9
Funded status (46.1) (47.0)  
Amounts recognized in the Consolidated Balance sheet at December 31      
Pension asset 0.0 0.0  
Pension obligation (46.1) (47.0)  
Postretirement medical and other benefit obligations 0.0 0.0  
Net amount recognized $ (46.1) $ (47.0)  
Weighted-Average Assumptions      
Discount rate 3.60% 4.20%  
Expected return on plan assets (as a percent) 4.70% 5.50% 5.80%
Rate of compensation increase 0.00% 0.00%  
Non-US Pension Plans      
Change in Benefit Obligation      
Benefit obligation, beginning of year $ 82.8 $ 252.5  
Distribution of MFS 0.0 (170.4)  
Service cost 1.9 1.7 $ 2.6
Interest cost 2.1 2.5 8.9
Participant contributions 0.0 0.0  
Medicare subsidies received 0.0 0.0  
Plan amendments 0.0 0.0  
Net transfer out 0.0 0.0  
Actuarial (gain) loss (2.2) 11.0  
Currency translation adjustment 9.2 (9.9)  
Benefits paid (4.3) (4.6)  
Benefit obligation, end of year 89.5 82.8 252.5
Change in Plan Assets      
Fair value of plan assets, beginning of year 41.8 196.9  
Distribution of MFS 0.0 (147.8)  
Actual return on plan assets 1.1 2.7  
Employer contributions 2.1 2.2  
Participant contributions 0.0 0.0  
Medicare subsidies received 0.0 0.0  
Currency translation adjustment 4.4 (7.6)  
Net transfer out 0.0 0.0  
Benefits paid (4.3) (4.6)  
Fair value of plan assets, end of year 45.1 41.8 $ 196.9
Funded status (44.4) (41.0)  
Amounts recognized in the Consolidated Balance sheet at December 31      
Pension asset 0.0 0.0  
Pension obligation (44.4) (41.0)  
Postretirement medical and other benefit obligations 0.0 0.0  
Net amount recognized $ (44.4) $ (41.0)  
Weighted-Average Assumptions      
Discount rate 2.20% 2.10%  
Expected return on plan assets (as a percent) 3.40% 4.00% 3.60%
Rate of compensation increase 2.60% 2.40%  
Postretirement Health and Other      
Change in Benefit Obligation      
Benefit obligation, beginning of year $ 41.6 $ 51.8  
Distribution of MFS 0.0 (10.1)  
Service cost 0.3 0.3 $ 0.4
Interest cost 1.0 1.7 2.0
Participant contributions 1.4 1.9  
Medicare subsidies received 0.0 0.2  
Plan amendments (13.8) 0.0  
Net transfer out 0.0 0.0  
Actuarial (gain) loss 2.9 1.8  
Currency translation adjustment 0.0 0.0  
Benefits paid (4.5) (6.0)  
Benefit obligation, end of year 28.9 41.6 51.8
Change in Plan Assets      
Fair value of plan assets, beginning of year 0.0 0.0  
Distribution of MFS 0.0 0.0  
Actual return on plan assets 0.0 0.0  
Employer contributions 3.1 3.9  
Participant contributions 1.4 1.9  
Medicare subsidies received 0.0 0.2  
Currency translation adjustment 0.0 0.0  
Net transfer out 0.0 0.0  
Benefits paid (4.5) (6.0)  
Fair value of plan assets, end of year 0.0 0.0 $ 0.0
Funded status (28.9) (41.6)  
Amounts recognized in the Consolidated Balance sheet at December 31      
Pension asset 0.0 0.0  
Pension obligation 0.0 0.0  
Postretirement medical and other benefit obligations (28.9) (41.6)  
Net amount recognized $ (28.9) $ (41.6)  
Weighted-Average Assumptions      
Discount rate 3.30% 3.80%  
Expected return on plan assets (as a percent) 0.00% 0.00% 0.00%
Rate of compensation increase 0.00% 0.00%