Derivative Financial Instruments (Tables)
 12 Months Ended
Mar. 31, 2015
Derivative Financial Instruments [Abstract]  
Schedule of Notional Amounts of Outstanding Derivative Positions [Table Text Block]
Total gross notional amounts and fair values for currency derivatives with cash flow hedge accounting designation are as follows:
 
As of March 31, 2015
 
As of March 31, 2014
 
Notional Amount
 
Fair Value
 
Notional Amount
 
Fair Value
 
 
Asset
 
Liability
 
 
Asset
 
Liability
Forward contracts to purchase
$
108

 
$
—

 
$
8

 
$
179

 
$
—

 
$
3

Forward contracts to sell
$
508

 
$
18

 
$
1

 
$
363

 
$
—

 
$
2
Schedule of Other Derivatives Not Designated as Hedging Instruments, Statements of Financial Performance and Financial Position, Location [Table Text Block]
Total gross notional amounts and fair values for currency derivatives that are not designated as hedging instruments are accounted for as follows:
 
As of March 31, 2015
 
As of March 31, 2014
 
Notional Amount
 
Fair Value
 
Notional Amount
 
Fair Value
 
 
Asset
 
Liability
 
 
Asset
 
Liability
Forward contracts to purchase
$
99

 
$
—

 
$
—

 
$
140

 
$
—

 
$
1

Forward contracts to sell
$
173

 
$
—

 
$
—

 
$
232

 
$
—

 
$
—

The effect of foreign currency forward contracts not designated as hedging instruments in our Consolidated Statements of Operations for the fiscal years ended March 31, 2015, 2014 and 2013, was as follows (in millions):
 
Location of Gain (Loss) Recognized in Income on
Derivative Instruments
 
Amount of Gain (Loss) Recognized in Income on Derivative Instruments
 
Year Ended March 31,
 
2015
 
2014
 
2013
Foreign currency forward contracts not designated as hedging instruments
Interest and other 
income (expense), net
 
$
58

 
$
(5
)
 
$
(2
)