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Equity-based compensation (Tables)
6 Months Ended
Jun. 30, 2022
Share-Based Payment Arrangements [Abstract]  
Summary of unvested share movements
The below table summarizes unvested share movements for all Alcon equity-based incentive plans for the six months ended June 30, 2022 and 2021:
Six months ended June 30
(shares in millions)20222021
Unvested at January 15.6 5.4 
Granted1.8 1.8 
Vested(2.1)(1.1)
Forfeited(0.1)(0.2)
Unvested at June 305.2 5.9