v3.5.0.2

Discontinued operations (Tables)

9 Months Ended

Sep. 30, 2016

Discontinued operations

Summary of income (loss) from discontinued operations

The following table summarizes the revenue and income from operations of the Wind Projects for the three and nine months ended September 30, 2015:

		Three months			Nine months
		ended			ended
		September 30,			September 30,
		2015			2015
Revenue		$	—		$	34.8
Project expenses:
Operations and maintenance			—			10.8
Depreciation and amortization			—			10.3
			—			21.1
Project other expense:
Change in fair value of derivatives			—			(0.7)
Equity in earnings of unconsolidated affiliates			—			(0.3)
Interest expense, net			—			(6.7)
Gain (loss) on sale of asset			(0.2)			47.2
			(0.2)			39.5
Income (loss) from operations of discontinued businesses			(0.2)			53.2
Income tax expense			0.3			32.6
Income (loss) from operations of discontinued businesses, net of tax			(0.5)			20.6
Net loss attributable to noncontrolling interests of discontinued businesses			—			(11.0)
Income (loss) from operations of discontinued businesses, net of noncontrolling interests		$	(0.5)		$	31.6

Summary of operating and investing cash flows

The following table summarizes the operating and investing cash flows of the Wind Projects for the nine months ended September 30, 2015:

	Nine months
	ended
	September 30,
	2015
Cash provided by operating activities	$	21.9
Cash used in investing activities		(12.8)

X

- Definition

Tabular disclosure of operating and investing cash flows from discontinued operations.

+ References

No definition available.

+ Details

Name:	at_ScheduleOfOperatingAndInvestingCashFlowsFromDiscontinuedOperationsTableTextBlock
Namespace Prefix:	at_
Data Type:	nonnum:textBlockItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Tabular disclosure of pro forma results of operations for a material business acquisition or series of individually immaterial business acquisitions that are material in the aggregate.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 805
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (h)(2)-(3)
-URI http://asc.fasb.org/extlink&oid=65885119&loc=d3e1392-128463

+ Details

Name:	us-gaap_BusinessAcquisitionProFormaInformationTextBlock
Namespace Prefix:	us-gaap_
Data Type:	nonnum:textBlockItemType
Balance Type:	na
Period Type:	duration

X

- References

No definition available.

+ Details

Name:	us-gaap_DiscontinuedOperationsAndDisposalGroupsAbstract
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration