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Employee Benefit Plans (Details 6) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Domestic Pension Plans      
Defined Benefit Plan, Pension Plans with Accumulated Benefit Obligations in Excess of Plan Assets      
Projected benefit obligation $ 371.1 $ 153.9  
Accumulated benefit obligation 370.8 151.0  
Fair value of plan assets 279.2 1.0  
Accumulated benefit obligation 370.8 442.9  
Defined Benefit Plan, Net Periodic Benefit Cost      
Service cost 2.5 7.1 $ 7.6
Interest cost 16.5 19.9 45.6
Expected return on plan assets (18.0) (19.5) (73.2)
Amortization of unrecognized prior service credits (0.1) 0.0 0.0
Recognized net actuarial (gains) losses [1] 18.9 50.9 (3.3)
Total net periodic pension benefit expense (income) $ 19.8 $ 58.4 $ (23.3)
Weighted-average actuarial assumptions used in determining net periodic pension expense:      
Discount rate (as a percent) 4.09% 4.54% 3.85%
Rate of increase in compensation levels (as a percent) 3.75% 3.75% 3.75%
Expected long-term rate of return on assets (as a percent) 5.75% 6.76% 7.25%
Weighted-average actuarial assumptions used in determining year-end benefit obligations:      
Discount rate (as a percent) 4.24% 3.90% 4.77%
Rate of increase in compensation levels (as a percent) 3.75% 3.75% 3.75%
Foreign Pension Plans      
Defined Benefit Plan, Pension Plans with Accumulated Benefit Obligations in Excess of Plan Assets      
Projected benefit obligation $ 7.4 $ 118.6  
Accumulated benefit obligation 7.4 115.4  
Fair value of plan assets 0.0 50.1  
Accumulated benefit obligation 155.7 236.0  
Defined Benefit Plan, Net Periodic Benefit Cost      
Service cost 1.3 2.6 $ 2.7
Interest cost 7.7 13.8 13.4
Expected return on plan assets (9.7) (17.6) (17.6)
Settlement loss [2] 0.0 15.0 0.0
Recognized net actuarial (gains) losses [3] 3.8 25.0 8.2
Total net periodic pension benefit expense (income) 3.1 38.8 6.7
Less: Net periodic pension expense of discontinued operations (1.9) (10.7) (2.1)
Net periodic pension benefit expense of continuing operations $ 1.2 $ 28.1 $ 4.6
Weighted-average actuarial assumptions used in determining net periodic pension expense:      
Discount rate (as a percent) 3.68% 4.23% 4.35%
Rate of increase in compensation levels (as a percent) 4.00% 3.92% 3.91%
Expected long-term rate of return on assets (as a percent) 5.81% 5.78% 6.45%
Weighted-average actuarial assumptions used in determining year-end benefit obligations:      
Discount rate (as a percent) 3.82% 3.31% 4.23%
Rate of increase in compensation levels (as a percent) 4.00% 3.87% 3.92%
Postretirement Plans      
Defined Benefit Plan, Net Periodic Benefit Cost      
Service cost $ 0.1 $ 0.4 $ 0.5
Interest cost 4.4 5.3 4.8
Settlements (1.8) 0.0 0.0
Amortization of unrecognized prior service credits (0.8) (0.3) (1.4)
Recognized net actuarial (gains) losses (4.0) 14.2 (7.8)
Total net periodic pension benefit expense (income) $ (2.1) $ 19.6 $ (3.9)
Weighted-average actuarial assumptions used in determining net periodic pension expense:      
Discount rate (as a percent) 3.53% 4.23% 3.37%
Weighted-average actuarial assumptions used in determining year-end benefit obligations:      
Discount rate (as a percent) 3.88% 3.55% 4.23%
Assumed health care cost trend rates:      
Heath care cost trend rate for next year (as a percent) 6.60% 6.79% 6.98%
Rate to which the cost trend rate is assumed to decline (the ultimate trend rate) (as a percent) 5.00% 5.00% 5.00%
Year that the rate reaches the ultimate trend rate 2024 2024 2024
Effects on postretirement expense of a percentage point change in assumed health care cost trend rates      
Effect of 1% increase on total of service and interest costs $ 5.8    
Effect of 1% decrease on total of service and interest costs $ 5.1    
[1] Consists primarily of our reported actuarial losses (gains), the difference between actual and expected returns on plan assets, settlement gains (losses), and curtailment gains.
[2] Includes the settlement loss recorded in connection with the transfer of the pension obligation for the retirees of the U.K. Plan to Just Retirement.
[3] Consists of our reported actuarial losses and the difference between actual and expected returns on plan assets.