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Pension and Post-Retirement Benefit Plans (Tables)
 9 Months Ended
Sep. 30, 2019
Retirement Benefits [Abstract]  
Components of net periodic benefit cost
The components of net periodic benefit cost for pensions benefits were as follows (in millions):
 
For the Three Months Ended September 30,
 
For the Nine Months Ended September 30,
 
2019
 
2018
 
2019
 
2018
Service cost
$
1.2

 
$
1.3

 
$
3.6

 
$
4.0

Interest cost
2.7

 
3.1

 
8.1

 
9.3

Expected return on plan assets
(3.6
)
 
(4.7
)
 
(10.8
)
 
(14.1
)
Amortization of prior service cost
0.1

 
0.1

 
0.1

 
0.1

Recognized actuarial loss
1.4

 
2.3

 
4.3

 
6.9

Other
—

 
0.3

 
—

 
0.3

Settlements and curtailments
—

 
—

 
60.6

 
—

Net periodic benefit cost
$
1.8


$
2.4

 
$
65.9

 
$
6.5