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Capitalized Software Held for Sale (Tables)
 12 Months Ended
Mar. 31, 2013
Capitalized Software Held for Sale [Abstract]  
Capitalized Software Held for Sale
 
Years Ended March 31,
(In millions)
2013
 
2012
 
2011
Capitalized software held for sale, net at beginning of period
$
144

 
$
152

 
$
234

Amounts capitalized
49

 
47

 
64

Amortization expense
(56
)
 
(53
)
 
(75
)
Impairment charges
(10
)
 
—

 
(72
)
Foreign currency translations adjustments, net
(1
)
 
(2
)
 
1

Capitalized software held for sale, net at end of period
$
126

 
$
144

 
$
152