Segment information Segment information - Capital Expenditures, Depreciation, Amortization (Details) - USD ($) $ in Millions	6 Months Ended
Jun. 30, 2017	Jun. 30, 2016
Segment Reporting Information [Line Items]
Capital Expenditures by Business Segment	$ 71.1	$ 45.0
Depreciation and Amortization by Business Segment	66.8	63.3
Amortization of Intangible Assets:	1.7	1.8
Total	68.5	65.1
Reportable segments
Segment Reporting Information [Line Items]
Capital Expenditures by Business Segment	64.4	39.8
Depreciation and Amortization by Business Segment	58.8	57.6
Reportable segments \| North America
Segment Reporting Information [Line Items]
Capital Expenditures by Business Segment	39.0	20.1
Depreciation and Amortization by Business Segment	33.6	33.6
Amortization of Intangible Assets:	0.1	0.0
Reportable segments \| South America
Segment Reporting Information [Line Items]
Capital Expenditures by Business Segment	15.3	7.3
Depreciation and Amortization by Business Segment	10.6	9.0
Amortization of Intangible Assets:	1.2	1.1
Reportable segments \| Rest of World
Segment Reporting Information [Line Items]
Capital Expenditures by Business Segment	10.1	12.4
Depreciation and Amortization by Business Segment	14.6	15.0
Amortization of Intangible Assets:	0.4	0.7
Corporate expenses
Segment Reporting Information [Line Items]
Capital Expenditures by Business Segment	5.5	2.7
Depreciation and Amortization by Business Segment	5.7	5.4
Venezuela \| Other items not allocated to segments
Segment Reporting Information [Line Items]
Capital Expenditures by Business Segment	1.2	2.5
Depreciation and Amortization by Business Segment	0.8	0.3
Reorganization and Restructuring 2016 \| Other items not allocated to segments
Segment Reporting Information [Line Items]
Depreciation and Amortization by Business Segment	$ 1.5	$ 0.0

The aggregate expense charged against earnings to allocate the cost of intangible assets (nonphysical assets not used in production) in a systematic and rational manner to the periods expected to benefit from such assets. As a noncash expense, this element is added back to net income when calculating cash provided by or used in operations using the indirect method.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 30
-Section 45
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The amount of expense recognized in the current period that reflects the allocation of the cost of tangible assets over the assets' useful lives. Includes production and non-production related depreciation.

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The cash outflow associated with the acquisition of long-lived, physical assets that are used in the normal conduct of business to produce goods and services and not intended for resale; includes cash outflows to pay for construction of self-constructed assets.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
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