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Common shares - Narrative (Detail) - Normal Course Issuer Bid Effective From June Twenty Ninth Two Thousand And Twenty Five - shares	Jun. 29, 2025	Jun. 15, 2025
Class of Stock [Line Items]
Normal course issuer bid share repurchase term, months	12 months
Normal course issuer bid share repurchase shares authorized	25,452,248
Percent of total shares		5.00%
Exxon Mobil Corporation
Class of Stock [Line Items]
Exxon Mobil Corporation's ownership interest in Imperial	69.60%

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