Interest Expense, net (Details) (USD $) In Millions	3 Months Ended
Jul. 29, 2011	Jul. 30, 2010
Interest Expense (Income), net [Abstract]
Interest Income	$ (45)	$ (33)
Interest Expense	77	107
Interest expense, net	$ 32	$ 74

Total interest costs incurred during the period and either capitalized or charged against earnings.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 34
-Paragraph 21

Name:	us-gaap_InterestCostsIncurred
Namespace Prefix:	us-gaap
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration