v3.26.1
property, plant and equipment (Details) - CAD ($)
$ in Millions
3 Months Ended 6 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Jun. 30, 2026
Jun. 30, 2025
Dec. 31, 2025
property, plant and equipment          
Property, plant and equipment at beginning of period     $ 17,503    
Depreciation $ 591 $ 601 1,174 $ 1,193  
Property, plant and equipment at end of period 17,819   17,819    
Impairment of real estate right-of-use lease assets     3    
Contractual commitments for the acquisition of property, plant and equipment 211   211   $ 184
Owned assets          
property, plant and equipment          
Property, plant and equipment at beginning of period     14,414    
Property, plant and equipment at end of period 15,094   15,094    
Owned assets | Network assets          
property, plant and equipment          
Property, plant and equipment at beginning of period     11,595    
Property, plant and equipment at end of period 11,977   11,977    
Owned assets | Buildings and leasehold improvements          
property, plant and equipment          
Property, plant and equipment at beginning of period     1,462    
Property, plant and equipment at end of period 1,492   1,492    
Owned assets | Computer hardware and other          
property, plant and equipment          
Property, plant and equipment at beginning of period     506    
Property, plant and equipment at end of period 500   500    
Owned assets | Land          
property, plant and equipment          
Property, plant and equipment at beginning of period     85    
Property, plant and equipment at end of period 82   82    
Owned assets | Investment property          
property, plant and equipment          
Property, plant and equipment at beginning of period     45    
Property, plant and equipment at end of period 44   44    
Owned assets | Assets under construction          
property, plant and equipment          
Property, plant and equipment at beginning of period     721    
Property, plant and equipment at end of period 999   999    
Right-of-use lease assets          
property, plant and equipment          
Property, plant and equipment at beginning of period     3,089    
Property, plant and equipment at end of period 2,725   2,725    
Right-of-use lease assets | Network assets          
property, plant and equipment          
Property, plant and equipment at beginning of period     1,776    
Property, plant and equipment at end of period 1,319   1,319    
Right-of-use lease assets | Real estate          
property, plant and equipment          
Property, plant and equipment at beginning of period     1,253    
Property, plant and equipment at end of period 1,332   1,332    
Right-of-use lease assets | Other          
property, plant and equipment          
Property, plant and equipment at beginning of period     60    
Property, plant and equipment at end of period 74   74    
AT COST          
property, plant and equipment          
Property, plant and equipment at beginning of period     49,821    
Additions     1,422    
Assets under construction put into service        
Transfers        
Dispositions, retirements and other     (459)    
Net foreign exchange differences     44    
Property, plant and equipment at end of period 50,828   50,828    
AT COST | Owned assets          
property, plant and equipment          
Property, plant and equipment at beginning of period     44,773    
Additions     830    
Transfers     1,106    
Dispositions, retirements and other     (379)    
Net foreign exchange differences     26    
Property, plant and equipment at end of period 46,356   46,356    
AT COST | Owned assets | Network assets          
property, plant and equipment          
Property, plant and equipment at beginning of period     38,005    
Additions     388    
Assets under construction put into service     5    
Transfers     1,082    
Dispositions, retirements and other     (315)    
Net foreign exchange differences     3    
Property, plant and equipment at end of period 39,168   39,168    
AT COST | Owned assets | Buildings and leasehold improvements          
property, plant and equipment          
Property, plant and equipment at beginning of period     4,018    
Additions     11    
Assets under construction put into service     96    
Dispositions, retirements and other     (33)    
Net foreign exchange differences     6    
Property, plant and equipment at end of period 4,098   4,098    
AT COST | Owned assets | Computer hardware and other          
property, plant and equipment          
Property, plant and equipment at beginning of period     1,898    
Additions     22    
Assets under construction put into service     36    
Transfers     24    
Dispositions, retirements and other     (28)    
Net foreign exchange differences     11    
Property, plant and equipment at end of period 1,963   1,963    
AT COST | Owned assets | Land          
property, plant and equipment          
Property, plant and equipment at beginning of period     85    
Dispositions, retirements and other     (3)    
Property, plant and equipment at end of period 82   82    
AT COST | Owned assets | Investment property          
property, plant and equipment          
Property, plant and equipment at beginning of period     46    
Property, plant and equipment at end of period 46   46    
AT COST | Owned assets | Assets under construction          
property, plant and equipment          
Property, plant and equipment at beginning of period     721    
Additions     409    
Assets under construction put into service     (137)    
Net foreign exchange differences     6    
Property, plant and equipment at end of period 999   999    
AT COST | Right-of-use lease assets          
property, plant and equipment          
Property, plant and equipment at beginning of period     5,048    
Additions     592    
Transfers     (1,106)    
Dispositions, retirements and other     (80)    
Net foreign exchange differences     18    
Property, plant and equipment at end of period 4,472   4,472    
AT COST | Right-of-use lease assets | Network assets          
property, plant and equipment          
Property, plant and equipment at beginning of period     2,150    
Additions     372    
Transfers     (1,106)    
Property, plant and equipment at end of period 1,416   1,416    
AT COST | Right-of-use lease assets | Real estate          
property, plant and equipment          
Property, plant and equipment at beginning of period     2,818    
Additions     189    
Dispositions, retirements and other     (76)    
Net foreign exchange differences     18    
Property, plant and equipment at end of period 2,949   2,949    
AT COST | Right-of-use lease assets | Other          
property, plant and equipment          
Property, plant and equipment at beginning of period     80    
Additions     31    
Dispositions, retirements and other     (4)    
Property, plant and equipment at end of period 107   107    
ACCUMULATED DEPRECIATION          
property, plant and equipment          
Property, plant and equipment at beginning of period     32,318    
Depreciation     1,174    
Transfers        
Dispositions, retirements and other     (509)    
Net foreign exchange differences     26    
Property, plant and equipment at end of period 33,009   33,009    
ACCUMULATED DEPRECIATION | Owned assets          
property, plant and equipment          
Property, plant and equipment at beginning of period     30,359    
Depreciation     961    
Transfers     335    
Dispositions, retirements and other     (407)    
Net foreign exchange differences     14    
Property, plant and equipment at end of period 31,262   31,262    
ACCUMULATED DEPRECIATION | Owned assets | Network assets          
property, plant and equipment          
Property, plant and equipment at beginning of period     26,410    
Depreciation     793    
Transfers     324    
Dispositions, retirements and other     (338)    
Net foreign exchange differences     2    
Property, plant and equipment at end of period 27,191   27,191    
ACCUMULATED DEPRECIATION | Owned assets | Buildings and leasehold improvements          
property, plant and equipment          
Property, plant and equipment at beginning of period     2,556    
Depreciation     80    
Dispositions, retirements and other     (34)    
Net foreign exchange differences     4    
Property, plant and equipment at end of period 2,606   2,606    
ACCUMULATED DEPRECIATION | Owned assets | Computer hardware and other          
property, plant and equipment          
Property, plant and equipment at beginning of period     1,392    
Depreciation     87    
Transfers     11    
Dispositions, retirements and other     (35)    
Net foreign exchange differences     8    
Property, plant and equipment at end of period 1,463   1,463    
ACCUMULATED DEPRECIATION | Owned assets | Land          
property, plant and equipment          
Property, plant and equipment at end of period 0   0    
ACCUMULATED DEPRECIATION | Owned assets | Investment property          
property, plant and equipment          
Property, plant and equipment at beginning of period     1    
Depreciation     1    
Property, plant and equipment at end of period 2   2    
ACCUMULATED DEPRECIATION | Owned assets | Assets under construction          
property, plant and equipment          
Property, plant and equipment at end of period 0   0    
ACCUMULATED DEPRECIATION | Right-of-use lease assets          
property, plant and equipment          
Property, plant and equipment at beginning of period     1,959    
Depreciation     213    
Transfers     (335)    
Dispositions, retirements and other     (102)    
Net foreign exchange differences     12    
Property, plant and equipment at end of period 1,747   1,747    
ACCUMULATED DEPRECIATION | Right-of-use lease assets | Network assets          
property, plant and equipment          
Property, plant and equipment at beginning of period     374    
Depreciation     59    
Transfers     (335)    
Dispositions, retirements and other     (1)    
Property, plant and equipment at end of period 97   97    
ACCUMULATED DEPRECIATION | Right-of-use lease assets | Real estate          
property, plant and equipment          
Property, plant and equipment at beginning of period     1,565    
Depreciation     137    
Dispositions, retirements and other     (97)    
Net foreign exchange differences     12    
Property, plant and equipment at end of period 1,617   1,617    
ACCUMULATED DEPRECIATION | Right-of-use lease assets | Other          
property, plant and equipment          
Property, plant and equipment at beginning of period     20    
Depreciation     17    
Dispositions, retirements and other     (4)    
Property, plant and equipment at end of period $ 33   $ 33