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Segment Disclosures (Tables)

12 Months Ended

Dec. 31, 2022

Disclosure of operating segments [abstract]

Disclosure of operating segments

Year ended Dec. 31, 2022			Hydro			Wind & Solar(1)			Gas			Energy Transition			Energy Marketing			Corporate			Total			Equity accounted investments(1)			Reclass adjustments			IFRS financials
Revenues			606			303			1,209			714			160			(2)			2,990			(14)			—			2,976
Reclassifications and adjustments:
Unrealized mark-to-market   loss			1			104			251			10			12			—			378			—			(378)			—
Realized (gain) loss on   closed exchange positions			—			—			(4)			—			47			—			43			—			(43)			—
Decrease in finance lease   receivable			—			—			46			—			—			—			46			—			(46)			—
Finance lease income			—			—			19			—			—			—			19			—			(19)			—
Unrealized foreign exchange   gain on commodity			—			—			—			—			(1)			—			(1)			—			1			—
Adjusted revenues			607			407			1,521			724			218			(2)			3,475			(14)			(485)			2,976
Fuel and purchased power			22			31			641			566			—			3			1,263			—			—			1,263
Reclassifications and adjustments:
Australian interest income			—			—			(4)			—			—			—			(4)			—			4			—
Adjusted fuel and purchased   power			22			31			637			566			—			3			1,259			—			4			1,263
Carbon compliance			—			1			83			(1)			—			(5)			78			—			—			78
Gross margin			585			375			801			159			218			—			2,138			(14)			(489)			1,635
OM&A			55			68			195			69			35			101			523			(2)			—			521
Taxes, other than income   taxes			3			12			15			4			—			1			35			(2)			—			33
Net other operating (income)   loss			—			(23)			(38)			—			—			—			(61)			3			—			(58)
Insurance recovery			—			7			—			—			—			—			7			—			(7)			—
Adjusted net other operating   (income) loss			—			(16)			(38)			—			—			—			(54)			3			(7)			(58)
Adjusted EBITDA(2)			527			311			629			86			183			(102)			1,634
Equity income																														9
Finance lease income																														19
Depreciation and amortization																														(599)
Asset impairment charges																														(9)
Net interest expense																														(262)
Foreign exchange gain																														4
Gain on sale of assets and   other																														52
Earnings before income taxes																														353

(1)    The Skookumchuck wind facility has been included on a proportionate basis in the Wind and Solar segment.

(2)    Adjusted EBITDA is not defined and has no standardized meaning under IFRS.

Year ended Dec. 31, 2021			Hydro			Wind & Solar(1)			Gas			Energy Transition			Energy Marketing			Corporate			Total			Equity accounted investments(1)			Reclass adjustments			IFRS financials
Revenues			383			323			1,109			709			211			4			2,739			(18)			—			2,721
Reclassifications and adjustments:
Unrealized mark-to-market   (gain) loss			—			25			(40)			19			(38)			—			(34)			—			34			—
Realized (gain) loss on closed   exchange positions(2)			—			—			(6)			—			29			—			23			—			(23)			—
Decrease in finance lease   receivable			—			—			41			—			—			—			41			—			(41)			—
Finance lease income			—			—			25			—			—			—			25			—			(25)			—
Unrealized foreign exchange   gain on commodity			—			—			(3)			—			—			—			(3)			—			3			—
Adjusted revenues			383			348			1,126			728			202			4			2,791			(18)			(52)			2,721
Fuel and purchased power			16			17			457			560			—			4			1,054			—			—			1,054
Reclassifications and adjustments:
Australian interest income			—			—			(4)			—			—			—			(4)			—			4			—
Mine depreciation			—			—			(79)			(111)			—			—			(190)			—			190			—
Coal inventory write-down			—			—			—			(17)			—			—			(17)			—			17			—
Adjusted fuel and purchased   power			16			17			374			432			—			4			843			—			211			1,054
Carbon compliance			—			—			118			60			—			—			178			—			—			178
Gross margin			367			331			634			236			202			—			1,770			(18)			(263)			1,489
OM&A			42			59			175			117			36			84			513			(2)			—			511
Reclassifications and adjustments:
Parts and materials   write-down			—			—			(2)			(26)			—			—			(28)			—			28			—
Curtailment gain			—			—			—			6			—			—			6			—			(6)			—
Adjusted OM&A			42			59			173			97			36			84			491			(2)			22			511
Taxes, other than income   taxes			3			10			13			6			—			1			33			(1)			—			32
Net other operating loss   (income)			—			—			(40)			48			—			—			8			—			—			8
Reclassifications and adjustments:
Royalty onerous contract and   contract termination penalties			—			—			—			(48)			—			—			(48)			—			48			—
Adjusted net other operating   loss (income)			—			—			(40)			—			—			—			(40)			—			48			8
Adjusted EBITDA(3)			322			262			488			133			166			(85)			1,286
Equity income																														9
Finance lease income																														25
Depreciation and amortization																														(529)
Asset impairment charges																														(648)
Net interest expense																														(245)
Foreign exchange gain																														16
Gain on sale of assets and   other																														54
Loss before income taxes																														(380)

(1)    The Skookumchuck wind facility has been included on a proportionate basis in the Wind and Solar segment.

(2)    In 2022, our adjusted EBITDA composition was adjusted to include the impact of closed positions that are effectively settled by offsetting positions with the same counterparty to reflect the performance of the assets and the Energy Marketing segment in the period in which the transactions occur.

(3)    Adjusted EBITDA is not defined and has no standardized meaning under IFRS.

Year ended Dec. 31, 2020			Hydro			Wind & Solar(1)			Gas			Energy Transition			Energy Marketing			Corporate			Total			Equity accounted investments(1)			Reclass adjustments			IFRS financials
Revenues			152			332			787			704			122			7			2,104			(3)			—			2,101
Reclassifications and adjustments:
Unrealized mark-to-market   (gain) loss			—			2			33			(14)			21			—			42			—			(42)			—
Realized gain on closed   exchange positions(2)			—			—			—			—			(10)			—			(10)			—			10			—
Decrease in finance lease   receivable			—			—			17			—			—			—			17			—			(17)			—
Finance lease income			—			—			7			—			—			—			7			—			(7)			—
Unrealized foreign   exchange loss on   commodity			—			—			4			—			—			—			4			—			(4)			—
Adjusted revenues			152			334			848			690			133			7			2,164			(3)			(60)			2,101
Fuel and purchased power			8			25			325			435			—			12			805			—			—			805
Reclassifications and adjustments:
Australian interest income			—			—			(4)			—			—			—			(4)			—			4			—
Mine depreciation			—			—			(100)			(46)			—			—			(146)			—			146			—
Coal inventory write-down			—			—			—			(37)			—			—			(37)			—			37			—
Adjusted fuel and purchased power			8			25			221			352			—			12			618			—			187			805
Carbon compliance			—			—			120			48			—			(5)			163			—			—			163
Gross margin			144			309			507			290			133			—			1,383			(3)			(247)			1,133
OM&A			37			53			166			106			30			80			472			—			—			472
Taxes, other than income   taxes			2			8			13			9			—			1			33			—			—			33
Net other operating income			—			—			(11)			—			—			—			(11)			—			—			(11)
Reclassifications and adjustments:
Impact of Sheerness going   off-coal			—			—			(28)			—			—			—			(28)			—			28			—
Adjusted net other operating   income			—			—			(39)			—			—			—			(39)			—			28			(11)
Adjusted EBITDA(3)			105			248			367			175			103			(81)			917
Equity income																														1
Finance lease income																														7
Depreciation and   amortization																														(654)
Asset impairment charges																														(84)
Net interest expense																														(238)
Foreign exchange gain																														17
Gain on sale of assets and   other																														9
Loss before income taxes																														(303)

(1)    The Skookumchuck wind facility has been included on a proportionate basis in the Wind and Solar segment.

(2)    In 2022, our adjusted EBITDA composition was adjusted to include the impact of closed positions that are effectively settled by offsetting positions with the same counterparty to reflect the performance of the assets and the Energy Marketing segment in the period in which the transactions occur.

(3)    Adjusted EBITDA is not defined and has no standardized meaning under IFRS.

Disclosure of selected consolidated statements of financial position information

Selected Consolidated Statements of Financial Position Information

As at Dec. 31, 2022			Hydro			Wind and Solar			Gas			Energy Transition			Energy Marketing			Corporate			Total
PP&E			437			2,837			1,858			313			—			111			5,556
Right-of-use assets			6			98			6			2			—			14			126
Intangible assets			2			157			49			5			8			31			252
Goodwill			258			176			—			—			30			—			464
As at Dec. 31, 2021			Hydro			Wind and Solar			Gas			Energy Transition			Energy Marketing			Corporate			Total
PP&E			466			2,304			2,036			481			—			33			5,320
Right-of-use assets			5			64			7			1			—			18			95
Intangible assets			3			147			56			9			5			36			256
Goodwill			258			175			—			—			30			—			463

Disclosure of components in other non-current assets

Additions to non-current assets are as follows:

Year ended Dec. 31, 2022			Hydro			Wind and Solar			Gas			Energy Transition			Energy Marketing			Corporate			Total
Additions to non-current assets:
PP&E			36			745			43			19			—			75			918
Intangible assets			—			19			—			—			3			9			31
Year ended Dec. 31, 2021			Hydro			Wind and Solar			Gas			Energy Transition			Energy Marketing			Corporate			Total
Additions to non-current assets:
PP&E			29			166			167			90			—			28			480
Intangible assets			—			—			—			1			—			8			9
Year ended Dec. 31, 2020			Hydro			Wind and Solar			Gas			Energy Transition			Energy Marketing			Corporate			Total
Additions to non-current assets:
PP&E			22			174			199			78			—			13			486
Intangible assets			—			—			—			1			—			13			14

Disclosure of reconciliation between depreciation and amortization

The reconciliation between depreciation and amortization reported on the Consolidated Statements of Earnings (Loss) and the Consolidated Statements of Cash Flows is presented below:

Year ended Dec. 31			2022			2021			2020
Depreciation and amortization expense on the Consolidated Statements of   Earnings (Loss)			599			529			654
Depreciation included in fuel and purchased power (Note 6)			—			190			144
Depreciation and amortization on the Consolidated Statements of Cash Flows			599			719			798

Disclosure of geographical areas

Revenues

Year ended Dec. 31			2022			2021			2020
Canada			1,905			1,854			1,227
US			940			731			716
Australia			131			136			158
Total revenue			2,976			2,721			2,101

II. Non-Current Assets

			Property, plant and equipment						Right-of-use assets						Intangible assets						Other assets
As at Dec. 31			2022			2021			2022			2021			2022			2021			2022			2021
Canada			3,817			4,051			49			52			123			141			62			15
US			1,307			860			74			39			101			85			34			61
Australia			432			409			3			4			28			30			64			66
Total			5,556			5,320			126			95			252			256			160			142

X

- Definition

The disclosure of geographical information.

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-IssueDate 2022-03-24
-Paragraph 33
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