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Commitments and contingencies (Tables)
 12 Months Ended
Dec. 31, 2024
Other Provisions, Contingent Liabilities And Contingent Assets [Abstract]  
Contractual obligation, fiscal year maturity schedule
The following table is a summary of our contractual obligations at December 31, 2024 that are due in each of the next five years and thereafter.
2025 2026 2027 2028 2029 Thereafter Total
Commitments for property, plant and
     equipment and intangible assets		 1,747  1,133  589  304  307  1,109  5,189 
Purchase obligations 711  617  381  257  240  612  2,818 
Planned acquisition of Ziply Fiber 7,000  —  —  —  —  —  7,000 
Leases committed not yet commenced 6  1  —  —  —  —  7 
Total 9,464  1,751  970  561  547  1,721  15,014