Income Taxes - Income Tax Reconciliation (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Income Tax Disclosure [Abstract]
Statutory tax expense (benefit)	$ (83.4)	$ 16.0	$ 54.1
Brazil non-taxable incentive	(5.8)	(4.2)	(15.5)
Valuation allowance	14.9	(0.7)	9.5
Brazil tax goodwill amortization	0.0	0.0	(1.5)
Foreign tax rate differential	(10.0)	(19.4)	(14.9)
Foreign subsidiary earnings	13.7	(9.1)	14.6
Accrual adjustments	1.1	1.5	2.2
Business tax credits	(0.7)	(1.4)	(2.4)
Non-deductible (non-taxable) items	2.3	4.2	0.0
Other	0.3	(0.6)	1.3
Income tax (benefit) expense	$ (67.6)	$ (13.7)	$ 47.4