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Description of business (Details) $ in Millions	Dec. 31, 2019 USD ($) segment	Apr. 09, 2019
Corporate Information And Statement Of IFRS Compliance [Abstract]
Number of reporting segments | segment	2
Shares received in spin-off		0.2
Total asset and net sales threshold | $	$ 5

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Corporate Information And Statement Of IFRS Compliance [Abstract]

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Number Of Reportable Segments

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Stockholders' Equity, Spin-Off Conversion Ratio, Shares Received

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Total Asset and Net Sales Threshold To Be Included Consolidated Statements

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