Segment information - Capital Expenditures, Depreciation, Amortization (Details) - USD ($) $ in Millions	3 Months Ended								12 Months Ended
	Dec. 31, 2020	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Segment Reporting Information [Line Items]
Capital Expenditures by Reportable Segment	$ 39.4	$ 25.2	$ 23.7	$ 30.2	$ 48.8	$ 42.9	$ 37.9	$ 35.2	$ 118.5	$ 164.8	$ 155.1
Depreciation and Amortization by Reportable Segment									171.7	157.2	144.6
Amortization of intangible assets:									35.1	27.8	17.7
Total	$ 54.6	$ 55.1	$ 52.1	$ 45.0	$ 45.5	$ 42.9	$ 48.7	$ 47.9	206.8	185.0	162.3
Reportable Segments:
Segment Reporting Information [Line Items]
Capital Expenditures by Reportable Segment									112.5	154.5	140.3
Depreciation and Amortization by Reportable Segment									158.5	141.3	129.7
Reportable Segments: | North America
Segment Reporting Information [Line Items]
Capital Expenditures by Reportable Segment									27.4	40.7	34.6
Depreciation and Amortization by Reportable Segment									62.3	64.2	58.2
Reportable Segments: | Latin America
Segment Reporting Information [Line Items]
Capital Expenditures by Reportable Segment									35.1	80.3	67.8
Depreciation and Amortization by Reportable Segment									44.0	44.8	40.2
Reportable Segments: | Europe
Segment Reporting Information [Line Items]
Capital Expenditures by Reportable Segment									33.4	16.2	22.2
Depreciation and Amortization by Reportable Segment									32.2	21.3	20.2
Reportable Segments: | Rest of World
Segment Reporting Information [Line Items]
Capital Expenditures by Reportable Segment									16.6	17.3	15.7
Depreciation and Amortization by Reportable Segment									20.0	11.0	11.1
Corporate items
Segment Reporting Information [Line Items]
Capital Expenditures by Reportable Segment									6.0	10.3	14.8
Depreciation and Amortization by Reportable Segment									9.1	10.8	11.9
Other items not allocated to segments:
Segment Reporting Information [Line Items]
Depreciation and Amortization by Reportable Segment									1.0	3.1
Venezuela | Other items not allocated to segments:
Segment Reporting Information [Line Items]
Depreciation and Amortization by Reportable Segment									0.0	0.0	1.1
ARGENTINA | Other items not allocated to segments:
Segment Reporting Information [Line Items]
Depreciation and Amortization by Reportable Segment									1.8	1.8
Reorganization and Restructuring | Other items not allocated to segments:
Segment Reporting Information [Line Items]
Depreciation and Amortization by Reportable Segment									$ 1.3	$ 0.2	$ 1.9