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Debt
3 Months Ended
May 02, 2015
Debt [Abstract]  
Debt
Debt
Long-term debt consists of the following unsecured senior debt:
 
 
 
 
 
Outstanding
Maturity
Effective
Rate
 
Coupon Rate
 
May 2, 2015
 and
January 31, 2015
May 3, 2014
 
 
 
 
 
(Dollars in Millions)
2017
6.31
%
 
6.25
%
 
$
650

 
$
650

2021
4.81
%
 
4.00
%
 
650

 
650

2023
3.25
%
 
3.25
%
 
350

 
350

2023
4.78
%
 
4.75
%
 
300

 
300

2029
7.36
%
 
7.25
%
 
200

 
200

2033
6.05
%
 
6.00
%
 
300

 
300

2037
6.89
%
 
6.88
%
 
350

 
350

 
5.54
%
 
 
 
2,800

 
2,800

Unamortized debt discount
 
 
 
 
(7
)
 
(8
)
Long-term debt
 
 
 
 
$
2,793

 
$
2,792



ASC No. 820, Fair Value Measurements and Disclosures, requires fair value measurements be classified in various pricing categories. Our long-term debt is classified as Level 1, financial instruments with unadjusted, quoted prices listed on active market exchanges. The estimated fair value of our long-term debt was $3.1 billion at May 2, 2015, January 31, 2015 and May 3, 2014.