Segments - Segment income statement information (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Segment Reporting [Abstract]
Net income (loss)	$ 28.9	$ 2.5	$ 86.6	$ (45.1)
Net income from discontinued operations	0.0	0.0	0.0	(5.4)
Inventory step-up adjustment	0.0	5.3	0.0	5.3
Depreciation	41.6	41.6	123.7	114.5
Amortization	14.7	12.1	45.3	45.1
Interest expense, net	27.7	36.8	85.7	108.9
Income tax expense	2.7	43.2	14.0	38.4
Other operating expenses, net	21.4	30.2	69.1	258.8
Other (income) expense, net	(2.4)	5.5	7.4	17.2
Impairment charges	20.7	7.0	37.6	7.0
Loss on sale of business	9.3	0.0	17.9	0.0
Loss on extinguishment of debt	0.0	0.0	1.8	0.7
Brazil VAT charge	0.0	0.0	0.3	0.0
Adjusted EBITDA	$ 164.6	$ 184.2	$ 489.4	$ 545.4