v3.24.0.1
Share-based compensation - Schedule of restricted share units (Details)
$ / shares in Units, $ / shares in Units, $ in Millions, $ in Millions
 12 Months Ended
Dec. 31, 2023
shares
$ / shares
Dec. 31, 2022
USD ($)
shares
$ / shares
Dec. 31, 2022
CAD ($)
shares
$ / shares
Dec. 31, 2021
shares
$ / shares
Phantom restricted share units - US$ denominated        
Number of restricted share units - Non-vested        
Outstanding, beginning of year (in shares) 1,605,821 1,850,807 1,850,807 1,383,642
Granted (in shares) 1,567,809 821,223 821,223 1,383,983
Vested (in shares) (423,501) (798,373) (798,373) (805,429)
Forfeited (in shares) (134,383) (267,836) (267,836) (111,389)
Outstanding, end of year (in shares) 2,615,746 1,605,821 1,605,821 1,850,807
Granted (in shares) 770,043 59,512 59,512  
Number of restricted share units - Vested        
Vested (in shares) 423,501 798,373 798,373 805,429
Exercised (in shares) 1,193,544 857,885 857,885 805,429
Grant-date fair value        
Outstanding, beginning of year (in USD and CDN dollars per share) | $ / shares $ 27.10 $ 21.94   $ 7.94
Granted (in USD and CDN dollars per share) | $ / shares 15.34 26.41   27.26
Vested (in USD and CDN dollars per share) | $ / shares 26.49 16.63   7.29
Exercised (in USD and CDN dollars per share) | $ / shares 17.01 17.52   7.29
Forfeited (in USD and CDN dollars per share) | $ / shares 23.80 19.85   20.16
Outstanding, end of year (in USD and CDN dollars per share) | $ / shares $ 21.36 $ 27.10   $ 21.94
Phantom Restricted Share Units Settled With Subordinate Voting Shares        
Number of restricted share units - Vested        
Exercised (in shares)   360,044 360,044  
Phantom Restricted Share Units and Phantom Share Units Settled With Cash        
Number of restricted share units - Vested        
Exercised (in shares)   497,841 497,841  
Grant-date fair value        
Exercised (in USD and CDN dollars per share) | $ / shares   $ 22.01    
Expense from cash-settled share-based payment transactions | $   $ 11    
Phantom restricted share units | TELUS Corporation (parent)        
Number of restricted share units - Non-vested        
Outstanding, beginning of year (in shares) 0 78,011 78,011 156,749
Granted (in shares)   0 0 24,757
Vested (in shares)   (59,549) (59,549) (85,154)
Issued in lieu of dividends (in shares)   0 0 0
Dividends (in shares)   1,568 1,568 5,023
Forfeited (in shares)   (20,030) (20,030) (23,364)
Outstanding, end of year (in shares)   0 0 78,011
Number of restricted share units - Vested        
Vested (in shares)   59,549 59,549 85,154
Dividends (in shares)   (59,549) (59,549) (86,745)
Exercised (in shares)   0 0 1,591
Grant-date fair value        
Outstanding, beginning of year (in USD and CDN dollars per share) | $ / shares $ 0 $ 24.20   $ 24.17
Granted (in USD and CDN dollars per share) | $ / shares   0   27.58
Vested (in USD and CDN dollars per share) | $ / shares   24.13   23.96
Issued in lieu of dividends (in dollars per share) | $ / shares   24.13   25.22
Exercised (in USD and CDN dollars per share) | (per share)   30.85 $ 28.67 27.43
Forfeited (in USD and CDN dollars per share) | $ / shares   24.92   24.72
Outstanding, end of year (in USD and CDN dollars per share) | $ / shares   $ 0   $ 24.20
Expense from cash-settled share-based payment transactions | $     $ 2  
Restricted Stock Units        
Number of restricted share units - Non-vested        
Outstanding, beginning of year (in shares) 1,218,796      
Outstanding, end of year (in shares) 1,926,994 1,218,796 1,218,796  
Performance Share Units        
Number of restricted share units - Non-vested        
Outstanding, beginning of year (in shares) 387,025      
Outstanding, end of year (in shares) 688,752 387,025 387,025