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Equity-based compensation (Tables)
6 Months Ended
Jun. 30, 2020
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, 2020 and from the date of the Spin-off through June 30, 2019 for the prior year:
 
 
Six months ended June 30
(shares in millions)
 
2020

2019

Unvested at January 1
 
4.7


Replacement awards issued at Spin-off(1)
 

4.2

Granted
 
2.0

0.6

Vested
 
(1.0
)

Forfeited
 
(0.2
)

Unvested at June 30
 
5.5

4.8

(1)
Alcon issued 4.2 million unvested equity-based awards to replace forfeited unvested Novartis awards at the time of the Spin-off.