Business acquisitions and combinations (Narrative) (Details) $ in Millions, $ in Millions |
12 Months Ended | |||||||
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Mar. 01, 2025
CAD ($)
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Dec. 06, 2023
CAD ($)
mi
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Dec. 06, 2023
USD ($)
mi
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Nov. 01, 2023
CAD ($)
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Dec. 31, 2025
CAD ($)
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Dec. 31, 2024
CAD ($)
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Dec. 31, 2023
CAD ($)
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Jan. 13, 2025
CAD ($)
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| Business Combination [Line Items] | ||||||||
| Investments accounted for under the equity method | $ 73 | $ 389 | $ 320 | |||||
| Cash, net of cash acquired | $ 0 | $ 0 | $ 390 | |||||
| Iowa Northern Railway Company | ||||||||
| Business Combination [Line Items] | ||||||||
| Amount of route miles acquired | mi | 175 | 175 | ||||||
| Payments for acquired business | $ 312 | $ 230 | ||||||
| Date fair value | $ 344 | |||||||
| Remeasurement gain | 24 | |||||||
| Properties | 426 | |||||||
| Deferred income tax liabilities | $ 90 | |||||||
| Cape Breton & Central Nova Scotia Railway | ||||||||
| Business Combination [Line Items] | ||||||||
| Cash, net of cash acquired | $ 78 | |||||||
| Properties | 101 | |||||||
| Deferred income tax liabilities | $ 18 | |||||||
| X | ||||||||||
- Definition Business Acquisition, Amount Of Route Miles Acquired No definition available.
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Amount of deferred tax liability assumed in business combination and recognized at acquisition date. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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- Definition Amount of property, plant, and equipment acquired in business combination and recognized at acquisition date. Reference 1: http://www.xbrl.org/2003/role/exampleRef
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- Definition Fair value at acquisition date of equity interest in acquiree held by acquirer immediately before acquisition date in business combination achieved in stages. Reference 1: http://www.xbrl.org/2003/role/exampleRef
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- Definition Amount of gain from remeasurement of acquisition-date fair value of equity interest in acquiree held by acquirer immediately before acquisition date in business combination achieved in stages. Reference 1: http://www.xbrl.org/2003/role/exampleRef
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- Definition This item represents the carrying amount on the entity's balance sheet of its investment in common stock of an equity method investee. This is not an indicator of the fair value of the investment, rather it is the initial cost adjusted for the entity's share of earnings and losses of the investee, adjusted for any distributions (dividends) and other than temporary impairment (OTTI) losses recognized. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition The cash outflow associated with the acquisition of business during the period. The cash portion only of the acquisition price. Reference 1: http://www.xbrl.org/2003/role/exampleRef
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- Definition The cash outflow associated with the acquisition of a business, net of the cash acquired from the purchase. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Details
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- Details
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