XML 28 R28.htm IDEA: XBRL DOCUMENT v2.4.0.8
Benefit Plans and Other Postretirement Benefits (Tables)
 9 Months Ended
Sep. 30, 2014
Compensation and Retirement Disclosure [Abstract]  
Components of Net Periodic Benefit Cost (Credit)
Components of Net Periodic Benefit Cost (Credit)
 
 
Three Months Ended Sept. 30
 
 
2014
 
2013
 
2014
 
2013
(Thousands of Dollars)
 
Pension Benefits
 
Postretirement Health
Care Benefits
Service cost
 
$
5,985

 
$
6,302

 
$
479

 
$
803

Interest cost
 
13,319

 
11,540

 
5,926

 
5,934

Expected return on plan assets
 
(17,677
)
 
(15,955
)
 
(7,554
)
 
(7,307
)
Amortization of transition obligation
 
—

 
—

 
—

 
196

Amortization of prior service credit
 
(773
)
 
(266
)
 
(1,562
)
 
(1,229
)
Amortization of net loss
 
8,473

 
10,855

 
1,609

 
3,490

Net benefit cost (credit) recognized for financial reporting
 
$
9,327

 
$
12,476

 
$
(1,102
)
 
$
1,887


 
 
Nine Months Ended Sept. 30
 
 
2014
 
2013
 
2014
 
2013
(Thousands of Dollars)
 
Pension Benefits
 
Postretirement Health
Care Benefits
Service cost
 
$
17,955

 
$
18,905

 
$
1,436

 
$
2,409

Interest cost
 
39,957

 
34,620

 
17,778

 
17,802

Expected return on plan assets
 
(53,031
)
 
(47,865
)
 
(22,661
)
 
(21,921
)
Amortization of transition obligation
 
—

 
—

 
—

 
588

Amortization of prior service credit
 
(2,319
)
 
(798
)
 
(4,685
)
 
(3,687
)
Amortization of net loss
 
25,419

 
32,563

 
4,826

 
10,469

Net benefit cost (credit) recognized for financial reporting
 
$
27,981

 
$
37,425

 
$
(3,306
)
 
$
5,660