Segment information (Details) $ in Millions	3 Months Ended
Mar. 31, 2021 USD ($) segment	Mar. 31, 2020 USD ($)
Segment Reporting Information [Line Items]
Number of operating segments \| segment	4
Change in allowance for doubtful accounts calculation method	$ 7.0
Revenues	977.7	$ 872.8
Operating Profit	61.7	26.2
Foreign currency transaction gains (losses)	(3.0)	(1.6)
Reportable segments
Segment Reporting Information [Line Items]
Revenues	977.7	872.8
Operating Profit	132.0	89.6
Corporate expenses
Segment Reporting Information [Line Items]
General, administrative and other expenses	(30.1)	(27.3)
Foreign currency transaction gains (losses)	0.1	(2.7)
Reconciliation of segment policies to GAAP(a)	(11.9)	3.5
Other items not allocated to segments
Segment Reporting Information [Line Items]
Acquisitions and dispositions, Revenues	0.0	0.0
Reorganization and Restructuring(b)	(6.6)	(5.6)
Acquisitions and dispositions, Operating profit	(18.7)	(19.1)
Reporting compliance	0.0	(0.2)
Other items not allocated to segments \| Argentina
Segment Reporting Information [Line Items]
Argentina highly inflationary impact	(3.9)	(2.4)
North America
Segment Reporting Information [Line Items]
Change in allowance for doubtful accounts calculation method	12.3
North America \| Reportable segments
Segment Reporting Information [Line Items]
Revenues	317.1	340.9
Operating Profit	32.3	13.4
Latin America \| Reportable segments
Segment Reporting Information [Line Items]
Revenues	269.7	299.0
Operating Profit	58.7	60.5
Europe \| Reportable segments
Segment Reporting Information [Line Items]
Revenues	214.4	126.3
Operating Profit	10.6	2.1
Rest of World \| Reportable segments
Segment Reporting Information [Line Items]
Revenues	176.5	106.6
Operating Profit	30.4	13.6
Internal Loss AR Rebuild
Segment Reporting Information [Line Items]
Change in allowance for doubtful accounts calculation method	1.6
Internal loss	(1.6)	(9.4)
Internal Loss AR Rebuild \| Other items not allocated to segments
Segment Reporting Information [Line Items]
Revenues	0.0	0.0
Internal loss	$ 0.8	$ (9.6)

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