v3.20.2

Income taxes (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Components of income tax expenses (benefit)
Current income tax expense	$ 2.1	$ 1.3	$ 4.5	$ 4.2
Deferred income tax expense (benefit)	0.4	(1.1)	0.7	(1.8)
Total income tax expense, net	$ 2.5	$ 0.2	$ 5.2	$ 2.4

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