Retirement Benefit Plans
 9 Months Ended
Nov. 01, 2014
Retirement Benefit Plans [Abstract]  
Retirement Benefit Plans
Retirement Benefit Plans
The components of net periodic benefit expense/(income) for our non-contributory qualified defined benefit pension plan (Primary Pension Plan), non-contributory supplemental pension plans and contributory postretirement health and welfare plan were as follows:
 
Three Months Ended
 
Nine Months Ended
($ in millions)
November 1,
2014
 
November 2,
2013
 
November 1,
2014
 
November 2,
2013
Primary Pension Plan
 
 
 
 
 
 
 
Service cost
$
15

 
$
20

 
$
46

 
$
59

Interest cost
53

 
51

 
158

 
153

Expected return on plan assets
(87
)
 
(85
)
 
(261
)
 
(255
)
Amortization of actuarial loss/(gain)
13

 
38

 
38

 
114

Amortization of prior service cost/(credit)
1

 
1

 
5

 
4

Loss/(gain) on transfer of benefits
6

 
—

 
6

 
—

Net periodic benefit expense/(income)
$
1

 
$
25

 
$
(8
)
 
$
75

 
 
 
 
 
 
 
 
Supplemental Pension Plans
 
 
 
 
 
 
 
Service cost
$
—

 
$
—

 
$
—

 
$
—

Interest cost
3

 
3

 
7

 
9

Amortization of actuarial loss/(gain)
3

 
6

 
11

 
18

Amortization of prior service cost/(credit)
—

 
—

 
—

 
—

Loss/(gain) on transfer of benefits
(6
)
 
—

 
(6
)
 
—

Net periodic benefit expense/(income)
$
—

 
$
9

 
$
12

 
$
27

 
 
 
 
 
 
 
 
Primary and Supplemental Pension Plans Total
 
 
 
 
 
 
 
Service cost
$
15

 
$
20

 
$
46

 
$
59

Interest cost
56

 
54

 
165

 
162

Expected return on plan assets
(87
)
 
(85
)
 
(261
)
 
(255
)
Amortization of actuarial loss/(gain)
16

 
44

 
49

 
132

Amortization of prior service cost/(credit)
1

 
1

 
5

 
4

Loss/(gain) on transfer of benefits
—

 
—

 
—

 
—

Net periodic benefit expense/(income)
$
1

 
$
34

 
$
4

 
$
102

 
 
 
 
 
 
 
 
Postretirement Health and Welfare Plan
 
 
 
 
 
 
 
Service cost
$
—

 
$
—

 
$
—

 
$
—

Interest cost
—

 
1

 
—

 
1

Amortization of actuarial loss/(gain)
—

 
(1
)
 
—

 
(1
)
Amortization of prior service cost/(credit)
(2
)
 
(2
)
 
(6
)
 
(6
)
Net periodic benefit expense/(income)
$
(2
)
 
$
(2
)
 
$
(6
)
 
$
(6
)
 
 
 
 
 
 
 
 
Retirement Benefit Plans Total
 
 
 
 
 
 
 
Service cost
$
15

 
$
20

 
$
46

 
$
59

Interest cost
56

 
55

 
165

 
163

Expected return on plan assets
(87
)
 
(85
)
 
(261
)
 
(255
)
Amortization of actuarial loss/(gain)
16

 
43

 
49

 
131

Amortization of prior service cost/(credit)
(1
)
 
(1
)
 
(1
)
 
(2
)
Loss/(gain) on transfer of benefits

—

 
—

 
—

 
—

Net periodic benefit expense/(income)
$
(1
)
 
$
32

 
$
(2
)
 
$
96


Net periodic benefit expense/(income) for our noncontributory postretirement health and welfare plan was predominantly included in SG&A expense in the unaudited Interim Consolidated Statements of Operations.
During the third quarter of 2014, we transferred $25 million of supplemental pension plan benefits, as allowed under the Employee Retirement Income Security Act of 1974, out of one of our supplemental pension plans and into our Primary Pension Plan. The transfer did not have a significant impact on our unaudited Interim Consolidated Financial Statements.
Defined Contribution Plans
Our defined contribution plans include a qualified Savings, Profit-Sharing and Stock Ownership Plan (401(k) plan), which includes a non-contributory retirement account, and a non-qualified contributory unfunded mirror savings plan offered to certain members of management. Total expense for our defined contribution plans for both of the third quarters of 2014 and 2013 was $12 million and was predominantly included in SG&A expenses in the unaudited Interim Consolidated Statements of Operations. Total expense for the first nine months for both of 2014 and 2013 was $38 million.