XML 39 R30.htm IDEA: XBRL DOCUMENT v3.4.0.3
Retirement Plans and Postretirement Benefit Plans (Tables)
 3 Months Ended
Mar. 31, 2016
Retirement Plans and Postretirement Benefit Plans [Abstract]  
Schedule of Defined Benefit Plans Disclosures [Table Text Block]
The details of net periodic benefit cost, before consideration of capitalized amounts, of the Company's Pension Plan, the Restoration of Retirement Income Plan and the postretirement benefit plans included in the Condensed Consolidated Financial Statements are as follows:
 
Net Periodic Benefit Cost
 
Pension Plan
Restoration of Retirement
Income Plan
Postretirement Benefit Plans
 
Three Months Ended March 31,
Three Months Ended March 31,
Three Months Ended March 31,
(In millions)
2016
2015
2016
2015
2016
2015
Service cost
$
4.4

$
4.5

$
0.1

$
0.4

$
0.3

$
0.5

Interest cost
6.6

6.4

0.1

0.2

2.3

2.6

Expected return on plan assets
(10.5
)
(11.8
)
—

—

(0.6
)
(0.6
)
Amortization of net loss
4.2

4.3

0.2

0.1

0.5

3.4

Amortization of unrecognized prior service cost (A)
—

0.1

—

—

(2.2
)
(4.1
)
Total net periodic benefit cost
4.7

3.5

0.4

0.7

0.3

1.8

Less: Amount paid by unconsolidated affiliates
1.3

1.1

—

—

0.1

0.3

Net periodic benefit cost (B)
$
3.4

$
2.4

$
0.4

$
0.7

$
0.2

$
1.5

(A)
Unamortized prior service cost is amortized on a straight-line basis over the average remaining service period to the first eligibility age of participants who are expected to receive a benefit and are active at the date of the plan amendment.
(B)
In addition to the $4.0 million and $4.6 million of net periodic benefit cost recognized during the three months ended March 31, 2016 and 2015, respectively, the Company recognized the following:

•
an increase in pension expense in the three months ended March 31, 2016 and 2015 of $2.3 million and $3.0 million, respectively, to maintain the allowable amount to be recovered for pension expense in the Oklahoma jurisdiction, which are included in the Pension tracker regulatory liability (see Note 1); and
•
an increase in postretirement medical expense in the three months ended March 31, 2016 and 2015 of $2.0 million and $1.4 million, respectively, to maintain the allowable amount to be recovered for postretirement medical expense in the Oklahoma jurisdiction, which are included in the Pension tracker regulatory liability (see Note 1).

Schedule of Capitalized Pension and Postretirement Cost [Table Text Block]
 
Three Months Ended
 
March 31,
(In millions)
2016
2015
Capitalized portion of net periodic pension benefit cost
$
1.2

$
0.8

Capitalized portion of net periodic postretirement benefit cost
0.1

0.5