Trade Accounts Receivable (Tables)

12 Months Ended

Mar. 31, 2013

Receivables [Abstract]

Components of trade accounts receivable, net

The components of “Trade accounts receivable, net” were as follows:

	At March 31,
(in millions)	2013			2012
Accounts receivable – billed	$	796		$	812
Accounts receivable – unbilled	63			80
Other receivables	21			26
Less: Allowances	(24		)	(16		)
Trade accounts receivable, net	$	856		$	902