Segment information (Details) $ in Millions	3 Months Ended			6 Months Ended
	Jun. 30, 2021 USD ($)	Mar. 31, 2021 USD ($)	Jun. 30, 2020 USD ($)	Jun. 30, 2021 USD ($) segment	Jun. 30, 2020 USD ($)
Segment Reporting Information [Line Items]
Number of operating segments | segment				4
Change in allowance for doubtful accounts calculation method				$ 3.5
Revenues	$ 1,048.8		$ 826.0	2,026.5	$ 1,698.8
Operating Profit	73.3		(1.0)	135.0	25.2
Foreign currency transaction gains (losses)				(5.0)	(3.5)
Reportable segments
Segment Reporting Information [Line Items]
Revenues	1,048.8		826.0	2,026.5	1,698.8
Operating Profit	148.8		82.4	280.8	172.0
Corporate expenses
Segment Reporting Information [Line Items]
General, administrative and other expenses	(38.5)		(24.6)	(68.6)	(51.9)
Foreign currency transaction gains (losses)	(0.1)		(0.9)	0.0	(3.6)
Reconciliation of segment policies to GAAP(a)	0.4		16.3	(11.5)	19.8
Other items not allocated to segments
Segment Reporting Information [Line Items]
Acquisitions and dispositions, Revenues	0.0		0.0	0.0	0.0
Reorganization and Restructuring(b)	(15.1)		(39.0)	(21.7)	(44.6)
Acquisitions and dispositions, Operating profit	(20.5)		(30.9)	(39.2)	(50.0)
Reporting compliance	0.0		(0.3)	0.0	(0.5)
Other items not allocated to segments | Argentina
Segment Reporting Information [Line Items]
Argentina highly inflationary impact	(2.6)		(2.8)	(6.5)	(5.2)
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	356.8		274.3	673.9	615.2
Operating Profit	41.1		8.4	73.4	21.8
Latin America | Reportable segments
Segment Reporting Information [Line Items]
Revenues	272.8		230.4	542.5	529.4
Operating Profit	57.1		41.8	115.8	102.3
Europe | Reportable segments
Segment Reporting Information [Line Items]
Revenues	230.8		167.9	445.2	294.2
Operating Profit	18.7		1.2	29.3	3.3
Rest of World | Reportable segments
Segment Reporting Information [Line Items]
Revenues	188.4		153.4	364.9	260.0
Operating Profit	31.9		31.0	62.3	44.6
Internal Loss AR Rebuild
Segment Reporting Information [Line Items]
Change in allowance for doubtful accounts calculation method				2.7
Internal loss				(2.7)	(10.6)
Internal Loss AR Rebuild | Other items not allocated to segments
Segment Reporting Information [Line Items]
Revenues	0.0		0.0	0.0	0.0
Internal loss	$ 0.9		$ (1.2)	$ 1.7	$ (10.8)