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Benefit Plans and Other Postretirement Benefits
 9 Months Ended
Sep. 30, 2015
Compensation and Retirement Disclosure [Abstract]  
Benefit Plans and Other Postretirement Benefits
Benefit Plans and Other Postretirement Benefits

Components of Net Periodic Benefit Cost
 
 
Three Months Ended Sept. 30
 
 
2015
 
2014
 
2015
 
2014
(Thousands of Dollars)
 
Pension Benefits
 
Postretirement Health
Care Benefits
Service cost
 
$
1,190

 
$
1,132

 
$
7

 
$
9

Interest cost
 
1,630

 
1,814

 
164

 
198

Expected return on plan assets
 
(2,371
)
 
(2,411
)
 
(8
)
 
(13
)
Amortization of prior service cost (credit)
 
27

 
28

 
(87
)
 
(88
)
Amortization of net loss
 
1,701

 
1,654

 
114

 
167

Net benefit cost recognized for financial reporting
 
$
2,177

 
$
2,217

 
$
190

 
$
273


 
 
Nine Months Ended Sept. 30
 
 
2015
 
2014
 
2015
 
2014
(Thousands of Dollars)
 
Pension Benefits
 
Postretirement Health
Care Benefits
Service cost
 
$
3,570

 
$
3,396

 
$
21

 
$
26

Interest cost
 
4,890

 
5,442

 
490

 
593

Expected return on plan assets
 
(7,113
)
 
(7,232
)
 
(23
)
 
(39
)
Amortization of prior service cost (credit)
 
83

 
84

 
(263
)
 
(263
)
Amortization of net loss
 
5,103

 
4,962

 
342

 
500

Net benefit cost recognized for financial reporting
 
$
6,533

 
$
6,652

 
$
567

 
$
817



In January 2015, contributions of $90.0 million were made across four of Xcel Energy’s pension plans, of which $4.9 million was attributable to NSP-Wisconsin. Xcel Energy does not expect additional pension contributions during 2015.