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Receivables, Net
 12 Months Ended
Mar. 31, 2016
Receivables, Net, Current [Abstract]  
Receivables, Net
Receivables, Net
 
March 31,
(In millions)
2016
 
2015
Customer accounts
$
14,519

 
$
13,117

Other
3,711

 
2,965

Total
18,230

 
16,082

Allowances
(250
)
 
(168
)
Net
$
17,980

 
$
15,914



Other receivables primarily include amounts due from suppliers and customer unbilled receivables. The allowances are primarily for estimated uncollectible accounts.