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Pensions and Other Postretirement Benefits (Tables)
 6 Months Ended
Jun. 30, 2019
Retirement Benefits [Abstract]  
Components of net annual benefit cost (income)
The following table summarizes the components of net annual benefit cost (income):
(in Millions)
Three Months Ended June 30,
 
Six Months Ended June 30,
Pensions
 
Other Benefits
 
Pensions
 
Other Benefits
2019
 
2018
 
2019
 
2018
 
2019
 
2018
 
2019
 
2018
Service cost
$
1.4

 
$
1.5

 
$
—

 
$
—

 
$
2.5

 
$
3.2

 
$
—

 
$
—

Interest cost
12.1

 
11.4

 
0.2

 
0.2

 
24.3

 
22.8

 
0.4

 
0.3

Expected return on plan assets
(13.4
)
 
(15.8
)
 
—

 
—

 
(26.8
)
 
(31.6
)
 
—

 
—

Amortization of prior service cost (credit)
—

 
0.1

 
—

 
—

 
0.1

 
0.2

 
—

 
—

Recognized net actuarial and other (gain) loss
4.6

 
4.2

 
(0.2
)
 
(0.2
)
 
9.2

 
8.3

 
(0.4
)
 
(0.4
)
Recognized loss due to settlement (1)
—

 
0.4

 
—

 
—

 
—

 
1.3

 
—

 
—

Net periodic benefit cost (income)
$
4.7

 
$
1.8

 
$
—

 
$
—

 
$
9.3

 
$
4.2

 
$
—

 
$
(0.1
)

____________________
(1)
Settlement charge relates to the U.S. nonqualified defined benefit pension plan.