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WORKERS' PARTICIPATION: (Tables)
12 Months Ended
Dec. 31, 2021
WORKERS' PARTICIPATION:  
Schedule of workers' participation expense Workers’ participation expense for the three years ended December 31, 2021 was as follows (in millions):

    

2021

    

2020

    

2019

Current

$

344.5

$

248.5

$

188.8

Deferred

 

(72.8)

 

19.8

 

29.8

$

271.7

$

268.3

$

218.6