Receivables, Net (Tables)

12 Months Ended

Mar. 31, 2018

Receivables, Net, Current [Abstract]

Schedule of receivables

	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