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Remaining performance obligations (Details) $ in Millions | Dec. 31, 2018 CAD ($)
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Disclosure of performance obligations [line items] |
Remaining performance obligations | $ 5,761
2019 |
Disclosure of performance obligations [line items] |
Remaining performance obligations | 2,998
2020 |
Disclosure of performance obligations [line items] |
Remaining performance obligations | 1,602
2021 |
Disclosure of performance obligations [line items] |
Remaining performance obligations | 605
2022 |
Disclosure of performance obligations [line items] |
Remaining performance obligations | 305
2023 |
Disclosure of performance obligations [line items] |
Remaining performance obligations | 114
THEREAFTER |
Disclosure of performance obligations [line items] |
Remaining performance obligations | 137
Wireline |
Disclosure of performance obligations [line items] |
Remaining performance obligations | 3,016
Wireline | 2019 |
Disclosure of performance obligations [line items] |
Remaining performance obligations | 1,261
Wireline | 2020 |
Disclosure of performance obligations [line items] |
Remaining performance obligations | 821
Wireline | 2021 |
Disclosure of performance obligations [line items] |
Remaining performance obligations | 512
Wireline | 2022 |
Disclosure of performance obligations [line items] |
Remaining performance obligations | 261
Wireline | 2023 |
Disclosure of performance obligations [line items] |
Remaining performance obligations | 81
Wireline | THEREAFTER |
Disclosure of performance obligations [line items] |
Remaining performance obligations | 80
Wireless |
Disclosure of performance obligations [line items] |
Remaining performance obligations | 2,745
Wireless | 2019 |
Disclosure of performance obligations [line items] |
Remaining performance obligations | 1,737
Wireless | 2020 |
Disclosure of performance obligations [line items] |
Remaining performance obligations | 781
Wireless | 2021 |
Disclosure of performance obligations [line items] |
Remaining performance obligations | 93
Wireless | 2022 |
Disclosure of performance obligations [line items] |
Remaining performance obligations | 44
Wireless | 2023 |
Disclosure of performance obligations [line items] |
Remaining performance obligations | 33
Wireless | THEREAFTER |
Disclosure of performance obligations [line items] |
Remaining performance obligations | $ 57

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