CONSOLIDATED STATEMENTS OF COMPREHENSIVE (LOSS) INCOME - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
CONSOLIDATED STATEMENTS OF COMPREHENSIVE (LOSS) INCOME
Net (loss) income	$ (4.0)	$ 2.9	$ 19.7	$ 5.3
Other comprehensive income, net of tax:
Unrealized (loss) gain on hedging activities	(0.1)	0.1	(0.5)	0.1
Net amount reclassified to earnings	0.1	(0.2)	0.2	(0.3)
Net realized and unrealized loss on derivatives		(0.1)	(0.3)	(0.2)
Foreign currency translation adjustments	4.9	2.7	(6.3)	4.9
Other comprehensive income (loss), net of tax	4.9	2.6	(6.6)	4.7
Comprehensive income	0.9	5.5	13.1	10.0
Less: Comprehensive income (loss) attributable to preferred shares of a subsidiary company	1.7	1.7	(4.1)	(4.8)
Comprehensive (loss) income attributable to Atlantic Power Corporation	$ (0.8)	$ 3.8	$ 17.2	$ 14.8