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Employees (Tables)
 3 Months Ended
Mar. 31, 2019
Retirement Benefits [Abstract]  
Schedule of Net Periodic Benefit Cost The components of net periodic benefit cost related to our benefit plans consisted of the following:
 
Three Months Ended March 31,
Components of net periodic (benefit) cost:
2019
 
2018
Service cost
$
—

 
$
0.2

Interest cost
1.3

 
1.2

Expected return on plan assets
(1.9
)
 
(1.8
)
Recognition due to settlement
—

 
(0.2
)
Net periodic benefit
$
(0.6
)
 
$
(0.6
)