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Pensions and Other Postretirement Benefits (Tables)
 9 Months Ended
Sep. 30, 2017
Compensation and Retirement Disclosure [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 September 30
 
Nine Months Ended September 30
Pensions
 
Other Benefits
 
Pensions
 
Other Benefits
2017
 
2016
 
2017
 
2016
 
2017
 
2016
 
2017
 
2016
Components of net annual benefit cost (income):
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Service cost
$
1.8

 
$
1.1

 
$
—

 
$
—

 
$
5.6

 
$
6.0

 
$
—

 
$
—

Interest cost
11.2

 
12.5

 
0.1

 
0.2

 
33.7

 
37.4

 
0.5

 
0.6

Expected return on plan assets
(19.9
)
 
(21.4
)
 
—

 
—

 
(59.6
)
 
(64.3
)
 
—

 
—

Amortization of prior service cost (credit)
0.1

 
0.2

 
—

 
—

 
0.4

 
0.6

 
—

 
—

Recognized net actuarial and other (gain) loss
4.1

 
9.3

 
(0.3
)
 
(0.4
)
 
11.9

 
29.7

 
(0.8
)
 
(1.0
)
Recognized loss due to settlement (1)
1.2

 
—

 
—

 
—

 
2.0

 
—

 
—

 
—

Net periodic benefit cost (income)
$
(1.5
)
 
$
1.7

 
$
(0.2
)
 
$
(0.2
)
 
$
(6.0
)
 
$
9.4

 
$
(0.3
)
 
$
(0.4
)

____________________
(1)
Settlement charge relates to the non-qualified plan in the U.S.