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Employee Benefits (Tables)
3 Months Ended
Mar. 31, 2021
Compensation And Retirement Disclosure [Abstract]  
Schedule of Costs of Retirement Plans

The following table presents the components of our Company-sponsored pension plan costs:

 

 

Three Months

 

(in millions)

 

2021

 

 

2020

 

Interest cost

 

$

7.7

 

 

$

9.6

 

Expected return on plan assets

 

 

(12.0

)

 

 

(14.9

)

Amortization of prior service credit

 

 

(0.1

)

 

 

(0.1

)

Amortization of prior net pension loss

 

 

3.0

 

 

 

3.7

 

Total net periodic pension (benefit) cost

 

$

(1.4

)

 

$

(1.7

)