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Fair Value of Financial Instruments
3 Months Ended
Jul. 31, 2015
Fair Value of Financial Instruments [Abstract]  
Fair Value of Financial Instruments
Fair Value of Financial Instruments 
The fair value of cash, cash equivalents, and short-term borrowings approximate the carrying amounts due to the short maturities of these instruments. We determine the fair value of derivative financial instruments and long-term debt as discussed in Note 8. 

Below is a comparison of the fair values and carrying amounts of these instruments:
 
April 30, 2015
 
July 31, 2015
 
Carrying
 
Fair
 
Carrying
 
Fair
(Dollars in millions)
Amount
 
Value
 
Amount
 
Value
Assets:
 
 
 
 
 
 
 
Cash and cash equivalents
$
370

 
$
370

 
$
494

 
$
494

Currency derivatives
59

 
59

 
75

 
75

Liabilities:
 
 
 
 
 
 
 
Currency derivatives
18

 
18

 
11

 
11

Short-term borrowings
190

 
190

 
13

 
13

Current portion of long-term debt
250

 
253

 
250

 
252

Long-term debt
743

 
735

 
1,229

 
1,219