Fair Value Disclosures
 12 Months Ended
Jan. 28, 2017
Fair Value Disclosures [Abstract]  
Fair Value Disclosures
Fair Value Disclosures
In determining fair value, the accounting standards establish a three level hierarchy for inputs used in measuring fair value, as follows:

•
Level 1 — Quoted prices in active markets for identical assets or liabilities.
•
Level 2 — Significant observable inputs other than quoted prices in active markets for similar assets and liabilities, such as quoted prices for identical or similar assets or liabilities in markets that are not active; or other inputs that are observable or can be corroborated by observable market data.
•
Level 3 — Significant unobservable inputs reflecting our own assumptions, consistent with reasonably available assumptions made by other market participants.
 
Cash Flow Hedges Measured on a Recurring Basis
The $12 million fair value of our cash flow hedges are valued in the market using discounted cash flow techniques which use quoted market interest rates in discounted cash flow calculations which consider the instrument's term, notional amount, discount rate and credit risk. Significant inputs to the derivative valuation for interest rate swaps are observable in the active markets and are classified as Level 2 in the fair value measurement hierarchy.

Other Non-Financial Assets Measured on a non-Recurring Basis
In 2014, assets of 19 underperforming department stores that continued to operate with carrying values of $32 million were written down to their estimated fair values of $2 million resulting in impairment charges of $30 million. Store impairment charges are recorded in the line item Real estate and other, net in the Consolidated Statements of Operations. Key assumptions used to determine fair values were future cash flows including, among other things, expected future operating performance and changes in economic conditions as well as other market information obtained from brokers. Significant inputs related to valuing the store related assets are classified as Level 3 in the fair value measurement hierarchy.

Other Financial Instruments
Carrying values and fair values of financial instruments that are not carried at fair value in the Consolidated Balance Sheets are as follows:
 
 
As of January 28, 2017
 
As of January 30, 2016
($ in millions)
 
Carrying Amount
 
Fair Value
 
Carrying Amount
 
Fair Value
Total debt, excluding unamortized debt issuance costs, capital leases, financing obligation and notes payable
 
$
4,665

 
$
4,495

 
$
4,830

 
$
4,248


 
The fair value of long-term debt is estimated by obtaining quotes from brokers or is based on current rates offered for similar debt. As of January 28, 2017 and January 30, 2016, the fair values of cash and cash equivalents, accounts payable and short-term borrowings approximate their carrying values due to the short-term nature of these instruments.
 
Concentrations of Credit Risk 
We have no significant concentrations of credit risk.