Equity (Tables)

6 Months Ended

Jun. 30, 2018

Equity

Schedule of reconciliation of equity

	Six months ended June 30, 2018
	Total Atlantic		Preferred shares
	Power Corporation		issued by a subsidiary
	Shareholders’ Equity		company		Total Equity
Balance at January 1, 2018	$	(18.4)	$	215.2	$	196.8
Net income (loss)		15.2		(0.1)		15.1
Realized and unrealized gain on hedging activities, net of tax		0.4		—		0.4
Foreign currency translation adjustment		(7.5)		—		(7.5)
Common share repurchases		(9.2)		—		(9.2)
Preferred share repurchases		—		(4.5)		(4.5)
Share-based compensation		1.1		—		1.1
Dividends declared on preferred shares of a subsidiary company		—		(4.3)		(4.3)
Balance at June 30, 2018	$	(18.4)	$	206.3	$	187.9

	Six months ended June 30, 2017
	Total Atlantic		Preferred shares
	Power Corporation		issued by a subsidiary
	Shareholders’ Equity		company		Total Equity
Balance at January 1, 2017	$	64.6	$	221.3	$	285.9
Net (loss) income		(24.6)		4.3		(20.3)
Realized and unrealized gain on hedging activities, net of tax		0.1		—		0.1
Foreign currency translation adjustment		6.7		—		6.7
Defined benefit plan, net of tax		0.1		—		0.1
Share-based compensation		1.1		—		1.1
Dividends declared on preferred shares of a subsidiary company		—		(4.3)		(4.3)
Balance at June 30, 2017	$	48.0	$	221.3	$	269.3