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Segmented information - Revenue by Services and Products (Details) - CAD ($) $ in Millions | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2026 | Jun. 30, 2025 | Jun. 30, 2026 | Jun. 30, 2025
Disclosure of products and services [line items] |  |  |  |
Operating revenues | $ 6,176 | $ 6,085 | $ 12,344 | $ 12,015
Wireless voice and data |  |  |  |
Disclosure of products and services [line items] |  |  |  |
Operating revenues | 1,725 | 1,768 | 3,453 | 3,517
Wireline data |  |  |  |
Disclosure of products and services [line items] |  |  |  |
Operating revenues | 2,222 | 2,025 | 4,427 | 4,039
Wireline data | U.S | Bell CTS |  |  |  |
Disclosure of products and services [line items] |  |  |  |
Operating revenues | 197 |  | 392 |
Wireline voice |  |  |  |
Disclosure of products and services [line items] |  |  |  |
Operating revenues | 622 | 624 | 1,258 | 1,253
Wireline voice | U.S | Bell CTS |  |  |  |
Disclosure of products and services [line items] |  |  |  |
Operating revenues | 34 |  | 70 |
Media |  |  |  |
Disclosure of products and services [line items] |  |  |  |
Operating revenues | 849 | 773 | 1,561 | 1,474
Other wireline services |  |  |  |
Disclosure of products and services [line items] |  |  |  |
Operating revenues | 73 | 77 | 142 | 156
Other wireline services | U.S | Bell CTS |  |  |  |
Disclosure of products and services [line items] |  |  |  |
Operating revenues | 3 |  | 6 |
Total services |  |  |  |
Disclosure of products and services [line items] |  |  |  |
Operating revenues | 5,491 | 5,267 | 10,841 | 10,439
Wireless |  |  |  |
Disclosure of products and services [line items] |  |  |  |
Operating revenues | 555 | 594 | 1,140 | 1,218
Wireline |  |  |  |
Disclosure of products and services [line items] |  |  |  |
Operating revenues | 130 | 224 | 363 | 358
Total products |  |  |  |
Disclosure of products and services [line items] |  |  |  |
Operating revenues | $ 685 | $ 818 | $ 1,503 | $ 1,576

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