CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME
Net income	$ 2.4	$ 14.2
Other comprehensive income, net of tax:
Unrealized (loss) gain on hedging activities	(0.2)	0.2
Net amount reclassified to earnings	0.1	0.1
Net realized and unrealized (loss) gain on derivatives	(0.1)	0.3
Foreign currency translation adjustments	2.2	(4.6)
Other comprehensive income (loss), net of tax	2.1	(4.3)
Comprehensive income	4.5	9.9
Less: Comprehensive loss attributable to preferred shares of a subsidiary company	(6.5)	(1.7)
Comprehensive income attributable to Atlantic Power Corporation	$ 11.0	$ 11.6