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)
 6 Months Ended
Jun. 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
June 30,
 
Six Months Ended
June 30,
 
2018
 
2017
 
2018
 
2017
Service cost
$
4.6

 
$
4.7

 
$
9.3

 
$
9.5

Interest cost
7.5

 
7.5

 
15.1

 
15.0

Expected return on plan assets
(15.0
)
 
(13.6
)
 
(30.0
)
 
(27.1
)
Amortization:
 
 
 
 
 
 
 
Prior service costs
0.6

 
0.7

 
1.1

 
1.3

Net actuarial loss
5.3

 
5.3

 
10.6

 
10.6

Net periodic benefit cost
$
3.0

 
$
4.6

 
$
6.1

 
$
9.3


Other Postretirement Benefits Credits
 
(In Millions)
 
Three Months Ended
June 30,
 
Six Months Ended
June 30,
 
2018
 
2017
 
2018
 
2017
Service cost
$
0.5

 
$
0.5

 
$
1.0

 
$
1.0

Interest cost
2.0

 
2.2

 
4.1

 
4.3

Expected return on plan assets
(4.6
)
 
(4.5
)
 
(9.2
)
 
(8.9
)
Amortization:
 
 
 
 
 
 
 
Prior service credits
(0.7
)
 
(0.8
)
 
(1.5
)
 
(1.5
)
Net actuarial loss
1.3

 
1.3

 
2.5

 
2.5

Net periodic benefit credit
$
(1.5
)
 
$
(1.3
)
 
$
(3.1
)
 
$
(2.6
)