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long-term debt (Details)
$ in Millions, $ in Millions
Dec. 31, 2021
CAD ($)
Dec. 31, 2021
USD ($)
Dec. 31, 2020
CAD ($)
Dec. 31, 2020
USD ($)
Details of long-term debt        
Long-term debt excluding Lease liabilities $ 18,976   $ 18,451  
Lease liabilities 1,876   1,837  
Long-term debt 20,852   20,288  
Current 2,927   1,432  
Non-current 17,925   18,856  
TELUS Corporation senior notes        
Details of long-term debt        
Long-term debt excluding Lease liabilities 15,258   15,021  
TELUS Corporation commercial paper        
Details of long-term debt        
Long-term debt excluding Lease liabilities 1,900   731  
Long-term debt 1,900 $ 1,500 731 $ 574
TELUS Communications Inc. debentures        
Details of long-term debt        
Long-term debt excluding Lease liabilities 448   622  
TELUS International (Cda) Inc. credit facility        
Details of long-term debt        
Long-term debt excluding Lease liabilities 1,062   1,804  
Other        
Details of long-term debt        
Long-term debt excluding Lease liabilities $ 308   $ 273