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Intangible assets and goodwill (Tables)
 12 Months Ended
Dec. 31, 2024
Disclosure of detailed information about intangible assets [abstract]  
Schedule of Intangible assets and goodwill
Intangible assets subject to amortization
(millions)NoteCustomer
relationships		Crowdsource assetsSoftwareBrand and other Total
intangible
assets		GoodwillTotal
intangible
assets and
goodwill
At cost
As at January 1, 2022$1,151 $120 $57 $35 $1,363 $1,350 $2,713 
Additions— — 14 — 14 — 14 
Additions from acquisition602 — — 92 694 599 1,293 
Dispositions and other— — (9)(25)(34)— (34)
Foreign exchange16 — 1 2 19 14 33 
As at December 31, 2023$1,769 $120 $63 $104 $2,056 $1,963 $4,019 
Additions— — 32 — 32 — 32 
Additions from acquisition1
— — — — — 3 3 
Dispositions and other— — (8)— (8)— (8)
Foreign exchange(32)— (2)(1)(35)(40)(75)
As at December 31, 2024$1,737 $120 $85 $103 $2,045 $1,926 $3,971 
Accumulated amortization
As at January 1, 2022$264 $30 $33 $28 $355 $— $355 
Amortization138 15 9 21 183 — 183 
Dispositions and other— — (9)(25)(34)— (34)
Foreign exchange5 — — 1 6 — 6 
As at December 31, 2023$407 $45 $33 $25 $510 $— $510 
Amortization138 15 10 17 180 — 180 
Dispositions and other— — (8)— (8)— (8)
Foreign exchange(15)— — (1)(16)— (16)
As at December 31, 2024$530 $60 $35 $41 $666 $— $666 
Net book value
As at December 31, 2023$1,362 $75 $30 $79 $1,546 $1,963 $3,509 
As at December 31, 2024$1,207 $60 $50 $62 $1,379 $1,926 $3,305 
1.In the first quarter of 2024, we acquired a business which expanded our customer experience delivery capabilities in the Asia-Pacific region for purchase consideration of $3 million.
Disclosure of information for cash-generating units The following mutually exclusive changes in the assumptions would result in the carrying value being equal to the recoverable amount:
Years Ended (increase (decrease) in millions)
Decreases in growth rate
Increases in discount rate
Decreases in perpetual growth rate
TELUS Digital
0.40%0.20%0.30%