Quarterly report pursuant to Section 13 or 15(d)

PENSIONS AND OTHER POSTRETIREMENT BENEFITS (Tables)

v3.10.0.1
PENSIONS AND OTHER POSTRETIREMENT BENEFITS (Tables)
 9 Months Ended
Sep. 30, 2018
Postemployment Benefits [Abstract]  
Schedule of Net Benefit Costs
The following are the components of defined benefit pension and OPEB costs and credits:
Defined Benefit Pension Costs
 
(In Millions)
 
Three Months Ended
September 30,
 
Nine Months Ended
September 30,
 
2018
 
2017
 
2018
 
2017
Service cost
$
4.7

 
$
3.4

 
$
14.0

 
$
12.9

Interest cost
7.6

 
7.9

 
22.7

 
22.9

Expected return on plan assets
(15.0
)
 
(13.8
)
 
(45.0
)
 
(40.9
)
Amortization:
 
 
 
 
 
 
 
Prior service costs
0.6

 
0.6

 
1.7

 
1.9

Net actuarial loss
5.3

 
6.1

 
15.9

 
16.7

Net periodic benefit cost
$
3.2

 
$
4.2

 
$
9.3

 
$
13.5


Other Postretirement Benefits Credits
 
(In Millions)
 
Three Months Ended
September 30,
 
Nine Months Ended
September 30,
 
2018
 
2017
 
2018
 
2017
Service cost
$
0.6

 
$
0.3

 
$
1.6

 
$
1.3

Interest cost
2.1

 
1.9

 
6.2

 
6.2

Expected return on plan assets
(4.6
)
 
(4.4
)
 
(13.8
)
 
(13.3
)
Amortization:
 
 
 
 
 
 
 
Prior service credits
(0.7
)
 
(0.8
)
 
(2.2
)
 
(2.3
)
Net actuarial loss
1.3

 
0.9

 
3.8

 
3.4

Net periodic benefit credit
$
(1.3
)
 
$
(2.1
)
 
$
(4.4
)
 
$
(4.7
)