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Income Taxes - Tax Provision (Benefit), Reconciliation, and Tax Rates (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
U.S. and foreign income before income taxes        
United States $ 1.2 $ 56.5 $ 31.8  
Foreign 218.1 213.0 214.9  
Income before income taxes 219.3 269.5 246.7  
Current:        
U.S. federal statutory tax (10.7) 14.8 8.2  
State 0.6 2.5 1.8  
Foreign 29.6 22.0 36.2  
Total current income tax provision (benefit) 19.5 39.3 46.2  
Deferred:        
U.S. federal statutory tax 4.6 10.7 2.2  
State 3.0 2.7 0.6  
Foreign (14.8) (3.0) (11.0)  
Total deferred income (loss) before income taxes (7.2) 10.4 (8.2)  
Non-current tax expense (income) 24.0 1.4 1.5  
Income tax provision $ 36.3 $ 51.1 $ 39.5 $ 38.2
Reconciliation of U.S. federal statutory income tax rate to effective income tax rate        
U.S. federal statutory tax rate (as a percent) 35.00% 35.00% 35.00%  
Foreign earnings, net of foreign taxes (as a percent) (28.20%) (18.10%) (18.70%)  
State income taxes, net of U.S. federal income tax benefit (as a percent) 1.10% 1.30% 0.60%  
U.S. tax on deemed dividends 6.10% 1.00% 1.40%  
Brazil foreign currency effect on other comprehensive income (5.40%) (1.50%) (1.40%)  
Other permanent differences (as a percent) 8.00% 1.30% (0.90%)  
Effective income tax rate (as a percent) 16.60% 19.00% 16.00% 16.00%
Effective income tax rate, excluding gain on sale of crude oil joint venture interests (as a percent)   17.70%    
Earnings attributable to foreign subsidiaries $ 1,500.0 $ 1,300.0    
Amount of income tax liability accrued $ 0.0 $ 0.0