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Employee Benefit Plans
 9 Months Ended
Sep. 30, 2014
Compensation and Retirement Disclosure [Abstract]  
Employee Benefit Plans
Note 7 – Employee Benefit Plans
Net periodic benefit cost (credit) is as follows:

Pension Benefits

Three months ended 
 September 30,

Nine months ended  
 September 30,

2014

2013

2014

2013

(Millions)
Components of net periodic benefit cost:







Service cost
$
10


$
11


$
30


$
33

Interest cost
15


12


46


38

Expected return on plan assets
(19
)

(15
)

(57
)

(45
)
Amortization of prior service cost
—

 
1

 
—

 
1

Amortization of net actuarial loss
10


15


29


45

Net periodic benefit cost
$
16


$
24


$
48


$
72



 
Other Postretirement Benefits
 
Three months ended 
 September 30,
 
Nine months ended  
 September 30,
 
2014
 
2013
 
2014
 
2013
 
(Millions)
Components of net periodic benefit cost (credit):
 
 
 
 
 
 
 
Service cost
$
—

 
$
1

 
$
1

 
$
2

Interest cost
2

 
2

 
7

 
8

Expected return on plan assets
(3
)
 
(3
)
 
(9
)
 
(7
)
Amortization of prior service credit
(5
)
 
(3
)
 
(15
)
 
(7
)
Amortization of net actuarial loss
—

 
1

 
—

 
4

Reclassification to regulatory liability
1

 
1

 
3

 
1

Net periodic benefit cost (credit)
$
(5
)
 
$
(1
)
 
$
(13
)
 
$
1


Amortization of prior service credit and net actuarial loss included in net periodic benefit cost (credit) for our other postretirement benefit plans associated with Transco and Northwest Pipeline are recorded to regulatory assets/liabilities instead of other comprehensive income (loss).
Amounts recognized in regulatory assets/liabilities include:
 
Three months ended 
 September 30,
 
Nine months ended  
 September 30,
 
2014
 
2013
 
2014
 
2013

(Millions)
Amortization of prior service credit
$
(3
)
 
$
(1
)
 
$
(9
)
 
$
(4
)
Amortization of net actuarial loss
—

 
—

 
—

 
2


During the nine months ended September 30, 2014, we contributed $61 million to our pension plans and $5 million to our other postretirement benefit plans. We presently anticipate making additional contributions of approximately $2 million to our pension plans and approximately $1 million to our other postretirement benefit plans in the remainder of 2014.