XML 194 R83.htm IDEA: XBRL DOCUMENT
v3.19.3.a.u2

Segment Disclosures (Tables) | 12 Months Ended
--- | ---
Dec. 31, 2019
Disclosure of entity's operating segments [Abstract] |
Disclosure of operating segments | Earnings Information
Year ended Dec. 31, 2019 | Canadian Coal | US Coal | Canadian Gas | Australian Gas | Wind and Solar | Hydro | Energy Marketing | Corporate | Total
Revenues | 816 |  | 571 |  | 209 |  | 160 |  | 312 |  | 156 |  | 129 |  | (6) |  | 2,347 |
Fuel, carbon compliance and purchased power | 570 |  | 416 |  | 74 |  | 9 |  | 16 |  | 7 |  | — |  | (6) |  | 1,086 |
Gross margin | 246 |  | 155 |  | 135 |  | 151 |  | 296 |  | 149 |  | 129 |  | — |  | 1,261 |
Operations, maintenance and administration | 138 |  | 67 |  | 44 |  | 37 |  | 50 |  | 36 |  | 30 |  | 73 |  | 475 |
Depreciation and amortization | 233 |  | 83 |  | 41 |  | 48 |  | 124 |  | 32 |  | 2 |  | 27 |  | 590 |
Asset impairment charge (reversal) | 15 |  | (10) |  | — |  | — |  | — |  | 2 |  | — |  | 18 |  | 25 |
Gain on termination of Keephills 3 coal rights contract (Note 4(D)) | (88) |  | — |  | — |  | — |  | — |  | — |  | — |  | — |  | (88) |
Taxes, other than income taxes | 13 |  | 3 |  | 1 |  | — |  | 8 |  | 3 |  | — |  | 1 |  | 29 |
Termination of Sundance B and C PPAs | (56) |  | — |  | — |  | — |  | — |  | — |  | — |  | — |  | (56) |
Net other operating expense (income) | (40) |  | — |  | (1) |  | — |  | (10) |  | — |  | — |  | 2 |  | (49) |
Operating income (loss) | 31 |  | 12 |  | 50 |  | 66 |  | 124 |  | 76 |  | 97 |  | (121) |  | 335 |
Finance lease income | — |  | — |  | 6 |  | — |  | — |  | — |  | — |  | — |  | 6 |
Net interest expense |  |  |  |  |  |  |  |  | (179) |
Foreign exchange loss |  |  |  |  |  |  |  |  | (15) |
Gain on sale of assets and other |  |  |  |  |  |  |  |  | 46 |
Earnings before income taxes |  |  |  |  |  |  |  |  | 193 |
Year ended Dec. 31, 2018 | Canadian Coal | US Coal | Canadian Gas | Australian Gas | Wind and Solar | Hydro | Energy Marketing | Corporate | Total
Revenues | 912 |  | 442 |  | 232 |  | 165 |  | 282 |  | 156 |  | 67 |  | (7) |  | 2,249 |
Fuel, carbon compliance and purchased power | 666 |  | 314 |  | 96 |  | 8 |  | 17 |  | 6 |  | — |  | (7) |  | 1,100 |
Gross margin | 246 |  | 128 |  | 136 |  | 157 |  | 265 |  | 150 |  | 67 |  | — |  | 1,149 |
Operations, maintenance and administration | 171 |  | 61 |  | 48 |  | 37 |  | 50 |  | 38 |  | 24 |  | 86 |  | 515 |
Depreciation and amortization | 241 |  | 74 |  | 43 |  | 49 |  | 110 |  | 30 |  | 2 |  | 25 |  | 574 |
Asset impairment charge | 38 |  | — |  | — |  | — |  | 12 |  | — |  | — |  | 23 |  | 73 |
Taxes, other than income taxes | 13 |  | 5 |  | 1 |  | — |  | 8 |  | 3 |  | — |  | 1 |  | 31 |
Termination of Sundance B and C PPAs (Note 9) | (157) |  | — |  | — |  | — |  | — |  | — |  | — |  | — |  | (157) |
Net other operating income | (41) |  | — |  | — |  | — |  | (6) |  | — |  | — |  | — |  | (47) |
Operating income (loss) | (19) |  | (12) |  | 44 |  | 71 |  | 91 |  | 79 |  | 41 |  | (135) |  | 160 |
Finance lease income | — |  | — |  | 8 |  | — |  | — |  | — |  | — |  | — |  | 8 |
Net interest expense |  |  |  |  |  |  |  |  | (250) |
Foreign exchange loss |  |  |  |  |  |  |  |  | (15) |
Gain on sale of assets |  |  |  |  |  |  |  |  | 1 |
Earnings before income taxes |  |  |  |  |  |  |  |  | (96) |
Year ended Dec. 31, 2017 | Canadian Coal | US Coal | Canadian Gas | Australian Gas | Wind | Hydro | Energy Marketing | Corporate | Total
Revenues | 999 |  | 435 |  | 261 |  | 135 |  | 287 |  | 121 |  | 69 |  | — |  | 2,307 |
Fuel, carbon compliance and purchased power | 585 |  | 293 |  | 101 |  | 14 |  | 17 |  | 6 |  | — |  | — |  | 1,016 |
Gross margin | 414 |  | 142 |  | 160 |  | 121 |  | 270 |  | 115 |  | 69 |  | — |  | 1,291 |
Operations, maintenance and administration | 192 |  | 51 |  | 50 |  | 31 |  | 48 |  | 37 |  | 24 |  | 84 |  | 517 |
Depreciation and amortization | 317 |  | 73 |  | 38 |  | 37 |  | 111 |  | 31 |  | 2 |  | 26 |  | 635 |
Asset impairment reversals | 20 |  | — |  | — |  | — |  | — |  | — |  | — |  | — |  | 20 |
Taxes, other than income taxes | 13 |  | 4 |  | 1 |  | — |  | 8 |  | 3 |  | — |  | 1 |  | 30 |
Net other operating income | (40) |  | — |  | (9) |  | — |  | — |  | — |  | — |  | — |  | (49) |
Operating income (loss) | (88) |  | 14 |  | 80 |  | 53 |  | 103 |  | 44 |  | 43 |  | (111) |  | 138 |
Finance lease income | — |  | — |  | 11 |  | 43 |  | — |  | — |  | — |  | — |  | 54 |
Net interest expense |  |  |  |  |  |  |  |  | (247) |
Foreign exchange loss |  |  |  |  |  |  |  |  | (1) |
Gain on sale of assets |  |  |  |  |  |  |  |  | 2 |
Earnings before income taxes |  |  |  |  |  |  |  |  | (54) |
Disclosure of selected consolidated statements of financial position information | Selected Consolidated Statements of Financial Position Information
As at Dec. 31, 2019 | Canadian Coal | US Coal | Canadian Gas | Australian Gas | Wind and Solar | Hydro | Energy Marketing | Corporate | Total
PP&E | 2,540 |  | 352 |  | 392 |  | 489 |  | 1,947 |  | 469 |  | 1 |  | 17 |  | 6,207 |
Right of use assets | 68 |  | — |  | — |  | 4 |  | 56 |  | 6 |  | — |  | 12 |  | 146 |
Intangible assets | 41 |  | 6 |  | 2 |  | 37 |  | 173 |  | 5 |  | 9 |  | 45 |  | 318 |
Goodwill | — |  | — |  | — |  | — |  | 176 |  | 258 |  | 30 |  | — |  | 464 |
As at Dec. 31, 2018 | Canadian Coal | US Coal | Canadian Gas | Australian Gas | Wind and Solar | Hydro | Energy Marketing | Corporate | Total
PP&E | 2,587 |  | 332 |  | 391 |  | 554 |  | 1,799 |  | 481 |  | 1 |  | 19 |  | 6,164 |
Intangible assets | 81 |  | 7 |  | 4 |  | 41 |  | 173 |  | 4 |  | 11 |  | 52 |  | 373 |
Goodwill | — |  | — |  | — |  | — |  | 175 |  | 259 |  | 30 |  | — |  | 464 |
Disclosure of components in other non-current assets | Additions to non-current assets are as follows:
Year ended Dec. 31, 2019 | Canadian Coal | US Coal | Canadian Gas | Australian Gas | Wind and Solar | Hydro | Energy Marketing | Corporate | Total
Additions to non-current assets: |  |  |  |  |  |  |  |  |
PP&E | 114 |  | 8 |  | 36 |  | 6 |  | 229 |  | 23 |  | — |  | 1 |  | 417 |
Intangible assets | 2 |  | — |  | — |  | — |  | — |  | — |  | — |  | 12 |  | 14 |
Year ended Dec. 31, 2018 | Canadian Coal | US Coal | Canadian Gas | Australian Gas | Wind and Solar | Hydro | Energy Marketing | Corporate | Total
Additions to non-current assets: |  |  |  |  |  |  |  |  |
PP&E | 101 |  | 14 |  | 21 |  | 6 |  | 117 |  | 16 |  | — |  | 2 |  | 277 |
Intangible assets | 3 |  | — |  | — |  | — |  | — |  | — |  | — |  | 17 |  | 20 |
Year ended Dec. 31, 2017 | Canadian Coal | US Coal | Canadian Gas | Australian Gas | Wind and Solar | Hydro | Energy Marketing | Corporate | Total
Additions to non-current assets: |  |  |  |  |  |  |  |  |
PP&E | 116 |  | 35 |  | 31 |  | 114 |  | 20 |  | 16 |  | — |  | 6 |  | 338 |
Intangible assets | 5 |  | 1 |  | — |  | 29 |  | — |  | — |  | — |  | 16 |  | 51 |
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 | 2019 | 2018 | 2017
Depreciation and amortization expense on the Consolidated Statements of Earnings (Loss) | 590 |  | 574 |  | 635 |
Depreciation included in fuel, carbon compliance and purchased power (Note 6) | 119 |  | 136 |  | 73 |
Depreciation and amortization on the Consolidated Statements of Cash Flows | 709 |  | 710 |  | 708 |
Disclosure of geographical areas | Revenues
Year ended Dec. 31 | 2019 | 2018 | 2017
Canada | 1,460 |  | 1,573 |  | 1,663 |
US | 727 |  | 511 |  | 509 |
Australia | 160 |  | 165 |  | 135 |
Total revenue | 2,347 |  | 2,249 |  | 2,307 |
II. Non-Current Assets
| Property, plant and equipment |  | Right of use assets |  | Intangible assets |  | Other assets |  | Goodwill |
As at Dec. 31 | 2019 | 2018 | 2019 | 2018 | 2019 | 2018 | 2019 | 2018 | 2019 | 2018
Canada | 4,854 |  | 4,953 |  | 109 |  | — |  | 213 |  | 273 |  | 75 |  | 101 |  | 418 |  | 417 |
US | 863 |  | 657 |  | 33 |  | — |  | 68 |  | 59 |  | 47 |  | 50 |  | 46 |  | 47 |
Australia | 490 |  | 554 |  | 4 |  | — |  | 37 |  | 41 |  | 76 |  | 83 |  | — |  | — |
Total | 6,207 |  | 6,164 |  | 146 |  | — |  | 318 |  | 373 |  | 198 |  | 234 |  | 464 |  | 464 |

X
- Definition The disclosure of geographical information. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 8 -IssueDate 2018-01-01 -Paragraph 33 -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IFRS&num=8&date=2018-03-01&anchor=para_33&doctype=Standard -URIDate 2018-03-16 + Details
Name: | ifrs-full_DisclosureOfGeographicalAreasExplanatory
Namespace Prefix: | ifrs-full_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition The disclosure of operating segments. [Refer: Operating segments [member]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 8 -IssueDate 2018-01-01 -Paragraph 23 -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IFRS&num=8&date=2018-03-01&anchor=para_23&doctype=Standard -URIDate 2018-03-16 + Details
Name: | ifrs-full_DisclosureOfOperatingSegmentsExplanatory
Namespace Prefix: | ifrs-full_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Disclosure of Components in Other Non-current Assets [Table Text Block] + References No definition available. + Details
Name: | tac_DisclosureofComponentsinOtherNoncurrentAssetsTableTextBlock
Namespace Prefix: | tac_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Disclosure of entity's operating segments [Abstract] + References No definition available. + Details
Name: | tac_DisclosureofentitysoperatingsegmentsAbstract
Namespace Prefix: | tac_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Disclosure of reconciliation between depreciation and amortization [Table Text Block] + References No definition available. + Details
Name: | tac_DisclosureofreconciliationbetweendepreciationandamortizationTableTextBlock
Namespace Prefix: | tac_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Disclosure of selected consolidated statements of financial position information [Table Text Block] + References No definition available. + Details
Name: | tac_DisclosureofselectedconsolidatedstatementsoffinancialpositioninformationTableTextBlock
Namespace Prefix: | tac_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration