v3.19.2
share-based compensation - TELUS International (Cda) Inc. restricted share units (Details)
3 Months Ended 6 Months Ended
Jun. 30, 2019
USD ($)
EquityInstruments
Jun. 30, 2019
USD ($)
EquityInstruments
Jun. 30, 2019
CAD ($)
EquityInstruments
TELUS International (Cda) Inc. restricted share units | Maximum      
share-based compensation      
Variable payout (as a percent) 150.00% 150.00% 150.00%
TELUS International (Cda) Inc. restricted share units | Minimum      
share-based compensation      
Variable payout (as a percent) 0.00% 0.00% 0.00%
TELUS International (Cda) Inc. Restricted Share Units US Dollar Denominated      
Number of restricted share units - Non-vested      
Outstanding, beginning of period | EquityInstruments 554,625 561,712 561,712
Issued - initial award | EquityInstruments 92,355 92,355 92,355
Forfeited and cancelled | EquityInstruments (1,387) (8,474) (8,474)
Outstanding, end of period | EquityInstruments 645,593 645,593 645,593
Weighted average grant-date fair value      
Outstanding, beginning of period, non-vested | $ $ 25.67 $ 25.68  
Issued | $ 27.81 27.81  
Forfeited and cancelled | $ 26.34 26.51  
Outstanding, end of period, non-vested | $ $ 25.98 $ 25.98  
TELUS International (Cda) Inc. Restricted Share Units Canadian Dollar Denominated      
Number of restricted share units - vested      
Outstanding, beginning of period | EquityInstruments   32,299 32,299
Exercised | EquityInstruments   (32,299) (32,299)
Weighted average grant-date fair value      
Outstanding, beginning of period, vested | $     $ 21.36
Exercised | $     $ 21.36