Segment financial information - reportable segments (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Information by reportable segment
Net sales	$ 1,785.6	$ 1,519.0
Adjusted EBITDA	363.1	262.8
Corporate
Information by reportable segment
Adjusted EBITDA	(42.6)	(32.3)
Americas
Information by reportable segment
Net sales	1,035.2	899.1
Adjusted EBITDA	252.0	190.0
Europe
Information by reportable segment
Net sales	650.4	544.0
Adjusted EBITDA	131.1	91.7
AMEA
Information by reportable segment
Net sales	100.0	75.9
Adjusted EBITDA	$ 22.6	$ 13.4