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capital structure financial policies - Calculation of free cash flow, and its reconciliation to cash provided by operating activities (Details) (Details) $ in Millions, $ in Millions | 3 Months Ended | 6 Months Ended | 12 Months Ended
--- | --- | --- | ---
Jun. 30, 2026 CAD ($) | Jun. 30, 2025 CAD ($) | Jun. 30, 2026 USD ($) | Jun. 30, 2026 CAD ($) | Jun. 30, 2025 CAD ($) | Jun. 30, 2026 CAD ($) | Dec. 31, 2025 USD ($) | Dec. 31, 2025 CAD ($) | Jun. 30, 2025 CAD ($)
Cash provided by operating activities |  |  |  |  |  |  |  |  |
EBITDA |  |  |  | $ (3,110) | $ (3,423) | $ (6,609) |  | $ (6,922) | $ (6,949)
Restructuring and other costs, net of disbursements |  |  |  |  |  | 273 |  |  | (26)
Effects of contract asset, acquisition and fulfilment and TELUS Easy Payment mobile device financing |  |  |  |  |  | 19 |  |  | (157)
Cash Provided By Operating Activities Before Income Taxes |  |  |  |  |  | 5,326 |  |  | 5,212
Items from the Consolidated statements of cash flows: |  |  |  |  |  |  |  |  |
Share-based compensation, net of employee share purchase plan cash outflows |  |  |  |  |  | 148 |  |  | 164
Net employee defined benefit plans expense | $ 18 | $ 14 |  | 31 | 29 | 62 |  |  | 68
Employer contributions to employee defined benefit plans | (4) | (5) |  | (9) | (10) | (22) |  |  | (18)
Gain on contributions of real estate to joint ventures |  |  |  |  |  | (51) |  |  | (65)
(Income) loss from equity accounted investments, net |  |  |  |  |  |  |  |  | 6
Gain on purchase of long-term debt |  |  |  |  |  | (303) |  |  |
Interest paid | (450) | (308) |  | (880) | (679) | (1,585) |  |  | (1,360)
Interest received | 20 | 17 |  | 45 | 22 | 76 |  |  | 34
Other |  |  |  |  |  | (137) |  |  | (133)
Capital expenditures |  |  |  |  |  | 237 |  |  | (250)
Capital expenditure for acquisition from related party |  |  |  |  |  |  |  |  | 93
Related party construction credit facility repayment made concurrent with capital expenditure for acquisition from related party |  |  |  |  |  | 26 |  |  |
Income taxes paid, net of refunds |  |  |  |  |  | (311) |  |  | (460)
Cash provided by operating activities | $ 1,342 | $ 1,166 |  | $ 2,392 | $ 2,243 | 5,015 |  |  | 4,752
Difference |  |  |  |  |  |  |  |  |
Effect of non-discretionary lease principal |  |  |  |  |  | (473) |  |  | (698)
Items from the Consolidated statements of cash flows: |  |  |  |  |  |  |  |  |
Share-based compensation, net of employee share purchase plan cash outflows |  |  |  |  |  | 5 |  |  | 13
Gain on contributions of real estate to joint ventures |  |  |  |  |  | 51 |  |  | 65
Gain on purchase of long-term debt |  |  |  |  |  | 303 |  |  |
Other |  |  |  |  |  | 137 |  |  | 133
Other working capital items |  |  |  |  |  | (237) |  |  | 250
Capital expenditures (excluding acquisition from related party) |  |  |  |  |  | (2,630) |  |  | (2,391)
Capital expenditure for acquisition from related party |  |  |  |  |  |  |  |  | (93)
Related party construction credit facility repayment made concurrent with capital expenditure for acquisition from related party and similar |  |  |  |  |  |  |  |  | 94
Difference before income taxes |  |  |  |  |  | (2,818) |  |  | (2,627)
Income taxes paid, net of refunds |  |  |  |  |  | 116 |  |  |
Difference |  |  |  |  |  | (2,702) |  |  | (2,627)
Free cash flow |  |  |  |  |  |  |  |  |
EBITDA |  |  |  |  |  | 6,609 |  |  | 6,949
Restructuring and other costs, net of disbursements |  |  |  |  |  | 273 |  |  | (26)
Effects of contract asset, acquisition and fulfilment and TELUS Easy Payment mobile device financing |  |  |  |  |  | 19 |  |  | (157)
Effect of non-discretionary lease principal |  |  |  |  |  | (473) |  |  | (698)
Free cash flow before income taxes |  |  |  |  |  | 2,508 |  |  | 2,585
Items from the Consolidated statements of cash flows: |  |  |  |  |  |  |  |  |
Share-based compensation, net of employee share purchase plan cash outflows |  |  |  |  |  | 153 |  |  | 177
Net employee defined benefit plans expense |  |  |  |  |  | 62 |  |  | 68
Employer contributions to employee defined benefit plans |  |  |  |  |  | (22) |  |  | (18)
(Income) loss from equity accounted investments, net |  |  |  |  |  |  |  |  | 6
Interest paid |  |  |  |  |  | (1,585) |  |  | (1,360)
Interest received |  |  |  |  |  | 76 |  |  | 34
Capital expenditures (excluding acquisition from related party) |  |  |  |  |  | (2,630) |  |  | (2,391)
Related party construction credit facility repayment made concurrent with capital expenditure for acquisition from related party and similar |  |  |  |  |  | 26 |  |  | 94
Income taxes paid, net of refunds |  |  |  |  |  | (195) |  |  | (460)
Free cash flow |  |  |  |  |  | $ 2,313 |  |  | $ 2,125
Lease principal replaced through discretionary prepayment |  |  | $ 849 |  |  |  | $ 0 |  |

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