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Fair Value of Financial Instruments
9 Months Ended
Jan. 31, 2017
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 currency derivatives 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, 2016
 
January 31, 2017
 
Carrying
 
Fair
 
Carrying
 
Fair
(Dollars in millions)
Amount
 
Value
 
Amount
 
Value
Assets:
 
 
 
 
 
 
 
Cash and cash equivalents
$
263

 
$
263

 
$
197

 
$
197

Currency derivatives
19

 
19

 
42

 
42

Liabilities:
 
 
 
 
 
 
 
Currency derivatives
10

 
10

 
11

 
11

Short-term borrowings
271

 
271

 
308

 
308

Current portion of long-term debt

 

 
249

 
249

Long-term debt
1,230

 
1,293

 
1,669

 
1,686