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Accumulated Other Comprehensive Income (Loss) (Details) - CAD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020
Components and changes in accumulated other comprehensive Income (loss) |  |  |  |
Accumulated other comprehensive income, beginning of the period |  | $ 146 |  |
Currency translation adjustment |  |  |  |
Losses (gains) on translating net assets of foreign operations, net of reclassifications to net earnings, net of tax |  | 4 | $ 14 |
Gains (losses) on financial instruments designated as hedges of foreign operations, net of reclassifications to net earnings, net of tax | [1] | (25) | 0 | $ 11
Cash flow hedges |  |  |  |
Losses on derivatives designated as cash flow hedges, net of reclassifications to net earnings and to non-financial assets, net of tax | [2] | (556) | (200) | 20
Other |  |  |  |
Intercompany and third-party investments at FVTOCI |  | (1) | 0 |
Accumulated other comprehensive income, end of the period |  | (222) | 146 |
Net income tax expense (recovery) relating to gains (losses) on financial instruments |  | (3) | 0 | 0
Net impact related to cash flow hedges |  | 112 | 57 | 23
Net of income tax expense |  | (12) | (11) | 3
Currency translation adjustment |  |  |  |
Components and changes in accumulated other comprehensive Income (loss) |  |  |  |
Accumulated other comprehensive income, beginning of the period |  | (35) | (21) |
Currency translation adjustment |  |  |  |
Losses (gains) on translating net assets of foreign operations, net of reclassifications to net earnings, net of tax |  | 21 | (14) |
Gains (losses) on financial instruments designated as hedges of foreign operations, net of reclassifications to net earnings, net of tax |  | (25) | 0 |
Other |  |  |  |
Accumulated other comprehensive income, end of the period |  | (39) | (35) | (21)
Cash flow hedges |  |  |  |
Components and changes in accumulated other comprehensive Income (loss) |  |  |  |
Accumulated other comprehensive income, beginning of the period |  | 228 | 436 |
Cash flow hedges |  |  |  |
Losses on derivatives designated as cash flow hedges, net of reclassifications to net earnings and to non-financial assets, net of tax |  | (456) | (208) |
Other |  |  |  |
Accumulated other comprehensive income, end of the period |  | (228) | 228 | 436
Net impact related to cash flow hedges |  | (112) | (57) |
Employee future benefits |  |  |  |
Components and changes in accumulated other comprehensive Income (loss) |  |  |  |
Accumulated other comprehensive income, beginning of the period |  | (29) | (66) |
Employee future benefits |  |  |  |
Net actuarial gains on defined benefit plans, net of tax |  | 37 | 37 |
Other |  |  |  |
Accumulated other comprehensive income, end of the period |  | 8 | (29) | (66)
Net of income tax expense |  | 12 | 11 |
Other |  |  |  |
Components and changes in accumulated other comprehensive Income (loss) |  |  |  |
Accumulated other comprehensive income, beginning of the period |  | (18) | (47) |
Other |  |  |  |
Intercompany and third-party investments at FVTOCI |  | 55 | 29 |
Accumulated other comprehensive income, end of the period |  | $ 37 | $ (18) | $ (47)
[1] | Net of income tax recovery of $3 million for the year ended Dec. 31, 2022 (2021 and 2020 – nil).
[2] | Net of income tax recovery of $138 million for the year ended Dec. 31, 2022 (2021 – $55 million recovery, 2020 – $8 million expense).

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- Definition The amount of accumulated items of income and expense (including reclassification adjustments) that are not recognised in profit or loss as required or permitted by other IFRSs. [Refer: IFRSs [member]; Other comprehensive income] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 1 -IssueDate 2022-03-24 -Paragraph 55 -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2022-en-r&anchor=para_55&doctype=Standard -URIDate 2022-03-24 + Details
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- Definition The gains (losses) recognised in other comprehensive income on exchange differences on the translation of financial statements of foreign operations, net of tax, before reclassification adjustments. [Refer: Other comprehensive income] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 1 -IssueDate 2022-03-24 -Paragraph 91 -Subparagraph a -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2022-en-r&anchor=para_91_a&doctype=Standard -URIDate 2022-03-24 + Details
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