Leases (Tables)

12 Months Ended

Jan. 31, 2012

Leases [Abstract]

Schedule Of Rental Expense For Facilities And Equipment

	Year Ended January 31
	2012			2011			2010
	(in millions)
Gross rental expense	$	178		$	174		$	156
Less lease and sublease income		(17	)		(23	)		(15	)
Net rental expense	$	161		$	151		$	141

Schedule Of Future Minimum Lease Commitments And Sublease Receipts Under Non-Cancelable Operating Leases

Year Ending January 31	Operating lease commitment		Lease or sublease receipts
	(in millions)
2013	$	124	$	1
2014		111		1
2015		93		1
2016		75		1
2017		55		—
2018 and thereafter		138		8
Total	$	596	$	12