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Accumulated Other Comprehensive Income | 12 Months Ended
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Dec. 31, 2024
Equity [Abstract] |
Accumulated Other Comprehensive Income | ACCUMULATED OTHER COMPREHENSIVE INCOME
($ millions) | Opening Balance |  | Net Change |  | Ending Balance
2024 |  |  |  |  |
Unrealized foreign currency translation gains (losses) |  |  |  |  |
Net investments in foreign operations | 1,059 |  |  | 1,653 |  |  | 2,712 |
Hedges of net investments in foreign operations | (452) |  |  | (262) |  |  | (714) |
Income tax recovery | 4 |  |  | 14 |  |  | 18 |
| 611 |  |  | 1,405 |  |  | 2,016 |
Other |  |  |  |  |
Interest rate hedges (Note 26) | 62 |  |  | 10 |  |  | 72 |
Unrealized employee future benefits (losses) gains (Note 24) | (9) |  |  | 2 |  |  | (7) |
Income tax expense | (11) |  |  | (3) |  |  | (14) |
| 42 |  |  | 9 |  |  | 51 |
Accumulated other comprehensive income | 653 |  |  | 1,414 |  |  | 2,067 |
2023 |  |  |  |  |
Unrealized foreign currency translation gains (losses) |  |  |  |  |
Net investments in foreign operations | 1,495 |  |  | (436) |  |  | 1,059 |
Hedges of net investments in foreign operations | (530) |  |  | 78 |  |  | (452) |
Income tax recovery (expense) | 7 |  |  | (3) |  |  | 4 |
| 972 |  |  | (361) |  |  | 611 |
Other |  |  |  |  |
Interest rate hedges (Note 26) | 49 |  |  | 13 |  |  | 62 |
Unrealized employee future benefits losses (Note 24) | (6) |  |  | (3) |  |  | (9) |
Income tax expense | (7) |  |  | (4) |  |  | (11) |
| 36 |  |  | 6 |  |  | 42 |
Accumulated other comprehensive income | 1,008 |  |  | (355) |  |  | 653 |

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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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