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Receivables, Net
12 Months Ended
Mar. 31, 2018
Receivables, Net, Current [Abstract]  
Receivables, Net
Receivables, Net
 
March 31,
(In millions)
2018
 
2017
Customer accounts
$
14,349

 
$
14,602

Other
3,578

 
3,893

Total
17,927

 
18,495

Allowances
(216
)
 
(280
)
Net
$
17,711

 
$
18,215



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