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Other income (expense)
 6 Months Ended
Jun. 30, 2026
Analysis of income and expense [abstract]  
Other income (expense) Other income (expense)
Three monthsSix months
For the period ended June 30Note 2026202520262025
Net early debt redemption gains11 89 91 89 357 
Interest income15 15 29 41 
Equity gains (losses) from investments in associates and joint ventures10 
Operations7 (1)10 (1)
Net mark-to-market losses on derivatives used to economically hedge
   equity settled share-based compensation plans		(62)(43)(29)(42)
Losses on retirements and disposals of property, plant and equipment and
    intangible assets		(1)(7)(12)(10)
Other (1)
10 (85)9 (65)
Total other income (expense)58 (30)96 280 
(1)Includes foreign exchange (losses) gains on derivatives used to economically hedge anticipated purchases and the acquisition of Ziply Fiber in foreign currencies in 2025.