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COMPONENTS OF ACCUMULATED OTHER COMPREHENSIVE INCOME | 6 Months Ended
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Jun. 30, 2025
Comprehensive Income (Loss), Net of Tax, Attributable to Parent [Abstract] |
COMPONENTS OF ACCUMULATED OTHER COMPREHENSIVE INCOME | 9. COMPONENTS OF ACCUMULATED OTHER COMPREHENSIVE INCOME Changes in Accumulated other comprehensive income (AOCI) attributable to our common shareholders for the six months ended June 30, 2025 and 2024 are as follows:
| Cash Flow Hedges |  | Excluded Components of Fair Value Hedges |  | Net Investment Hedges |  | Cumulative Translation Adjustment |  | Equity Investees and Other Investments |  | Pension and OPEB Adjustment |  | Total |
(millions of Canadian dollars) |  |  |  |  |  |  |  |  |  |  |  |  |  |
Balance as at January 1, 2025 |  | 407 |  |  | (14 | ) |  | (2,033 | ) |  | 8,452 |  |  | 1 |  |  | 302 |  |  | 7,115 |
Other comprehensive income/(loss) retained in AOCI |  | (15 | ) |  | 12 |  |  | 413 |  |  | (3,356 | ) |  | 21 |  |  | 62 |  |  | (2,863 | )
Other comprehensive (income)/loss reclassified to earnings |  |  |  |  |  |  |  |  |  |  |  |  |  |
Interest rate contracts 1 |  | 17 |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | 17 |
Foreign exchange contracts 2 |  | — |  |  | (3 | ) |  | — |  |  | — |  |  | — |  |  | — |  |  | (3 | )
Amortization of pension and OPEB actuarial gain 3 |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | (14 | ) |  | (14 | )
|  | 2 |  |  | 9 |  |  | 413 |  |  | (3,356 | ) |  | 21 |  |  | 48 |  |  | (2,863 | )
Tax impact |  |  |  |  |  |  |  |  |  |  |  |  |  |
Income tax on amounts retained in AOCI |  | 2 |  |  | (3 | ) |  | — |  |  | — |  |  | — |  |  | (13 | ) |  | (14 | )
Income tax on amounts reclassified to earnings |  | (3 | ) |  | 8 |  |  | — |  |  | — |  |  | — |  |  | 1 |  |  | 6 |
|  | (1 | ) |  | 5 |  |  | — |  |  | — |  |  | — |  |  | (12 | ) |  | (8 | )
Balance as at June 30, 2025 |  | 408 |  |  | — |  |  | (1,620 | ) |  | 5,096 |  |  | 22 |  |  | 338 |  |  | 4,244 |
| Cash Flow Hedges |  | Excluded Components of Fair Value Hedges |  | Net Investment Hedges |  | Cumulative Translation Adjustment |  | Equity Investees and Other Investments |  | Pension and OPEB Adjustment |  | Total |
(millions of Canadian dollars) |  |  |  |  |  |  |  |  |  |  |  |  |  |
Balance as at January 1, 2024 |  | 320 |  |  | (23 | ) |  | (728 | ) |  | 2,653 |  |  | 11 |  |  | 70 |  |  | 2,303 |
Other comprehensive income/(loss) retained in AOCI |  | 156 |  |  | (26 | ) |  | (538 | ) |  | 2,344 |  |  | 1 |  |  | — |  |  | 1,937 |
Other comprehensive (income)/loss reclassified to earnings |  |  |  |  |  |  |  |  |  |  |  |  |  |
Interest rate contracts 1 |  | 12 |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | 12 |
Commodity contracts 4 |  | (1 | ) |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | (1 | )
Foreign exchange contracts 2 |  | — |  |  | 31 |  |  | — |  |  | — |  |  | — |  |  | — |  |  | 31 |
Amortization of pension and OPEB actuarial gain 3 |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | (11 | ) |  | (11 | )
|  | 167 |  |  | 5 |  |  | (538 | ) |  | 2,344 |  |  | 1 |  |  | (11 | ) |  | 1,968 |
Tax impact |  |  |  |  |  |  |  |  |  |  |  |  |  |
Income tax on amounts retained in AOCI |  | (36 | ) |  | 6 |  |  | — |  |  | — |  |  | — |  |  | — |  |  | (30 | )
Income tax on amounts reclassified to earnings |  | (2 | ) |  | (7 | ) |  | — |  |  | — |  |  | — |  |  | 2 |  |  | (7 | )
|  | (38 | ) |  | (1 | ) |  | — |  |  | — |  |  | — |  |  | 2 |  |  | (37 | )
Balance as at June 30, 2024 |  | 449 |  |  | (19 | ) |  | (1,266 | ) |  | 4,997 |  |  | 12 |  |  | 61 |  |  | 4,234 |
1 Reported within Interest expense in the Consolidated Statements of Earnings. 2 Reported within Interest expense and Other income/(expense) in the Consolidated Statements of Earnings. 3 These components are included in the computation of net periodic benefit credit and are reported within Other income/(expense) in the Consolidated Statements of Earnings. 4 Reported within Transportation and other services revenues in the Consolidated Statements of Earnings.

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- Definition The entire disclosure for comprehensive income, which includes, but is not limited to, 1) the amount of income tax expense or benefit allocated to each component of other comprehensive income, including reclassification adjustments, 2) the reclassification adjustments for each classification of other comprehensive income and 3) the ending accumulated balances for each component of comprehensive income. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 944 -SubTopic 220 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-04(19)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147477250/944-220-S99-1 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 220 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03(21)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147483621/220-10-S99-2 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 942 -SubTopic 220 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-04(23)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147478524/942-220-S99-1 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 220 -Name Accounting Standards Codification -Publisher FASB -URI https://asc.fasb.org/220/tableOfContent + Details
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