Financial Instruments (Schedule Of Changes In Cash Flow Hedges In Other Comprehensive Income (Loss)) (Details) (USD $) In Millions, unless otherwise specified							3 Months Ended		9 Months Ended		3 Months Ended		9 Months Ended		3 Months Ended		9 Months Ended		3 Months Ended				9 Months Ended		3 Months Ended		9 Months Ended		3 Months Ended		9 Months Ended
	Apr. 29, 2012	Jan. 29, 2012	Jul. 31, 2011	May 01, 2011	Jan. 30, 2011	Aug. 01, 2010	Apr. 29, 2012 Foreign Exchange Forward Contracts [Member]	May 01, 2011 Foreign Exchange Forward Contracts [Member]	Apr. 29, 2012 Foreign Exchange Forward Contracts [Member]	May 01, 2011 Foreign Exchange Forward Contracts [Member]	Apr. 29, 2012 Foreign Exchange Forward Contracts [Member] Other Expenses/Income [Member]	May 01, 2011 Foreign Exchange Forward Contracts [Member] Other Expenses/Income [Member]	Apr. 29, 2012 Foreign Exchange Forward Contracts [Member] Other Expenses/Income [Member]	May 01, 2011 Foreign Exchange Forward Contracts [Member] Other Expenses/Income [Member]	Apr. 29, 2012 Foreign Exchange Forward Contracts [Member] Cost Of Products Sold [Member]	May 01, 2011 Foreign Exchange Forward Contracts [Member] Cost Of Products Sold [Member]	Apr. 29, 2012 Foreign Exchange Forward Contracts [Member] Cost Of Products Sold [Member]	May 01, 2011 Foreign Exchange Forward Contracts [Member] Cost Of Products Sold [Member]	Apr. 29, 2012 Currency Swap [Member]	May 01, 2011 Currency Swap [Member]	Apr. 29, 2012 Interest Rate Contract [Member] Interest Expense [Member]	May 01, 2011 Interest Rate Contract [Member] Interest Expense [Member]	Apr. 29, 2012 Interest Rate Contract [Member] Interest Expense [Member]	May 01, 2011 Interest Rate Contract [Member] Interest Expense [Member]	Apr. 29, 2012 Commodity Derivative Contracts [Member]	May 01, 2011 Commodity Derivative Contracts [Member]	Apr. 29, 2012 Commodity Derivative Contracts [Member]	May 01, 2011 Commodity Derivative Contracts [Member]	Apr. 29, 2012 Commodity Derivative Contracts [Member] Cost Of Products Sold [Member]	May 01, 2011 Commodity Derivative Contracts [Member] Cost Of Products Sold [Member]	Apr. 29, 2012 Commodity Derivative Contracts [Member] Cost Of Products Sold [Member]	May 01, 2011 Commodity Derivative Contracts [Member] Cost Of Products Sold [Member]
Derivative Instruments, Gain (Loss) [Line Items]
OCI derivative gain/(loss) at beginning of year	$ (22)	$ (19)	$ (31)	$ (32)	$ (25)	$ (28)
Derivative instruments gain (loss) recognized in OCI							2	(7)	7	(10)									1	0					0	(1)	0	2
Derivative instrument gain (loss) reclassified											0	1	0	1	(6)	0	0	2			0	1	2	2					0	(1)	0	(1)
OCI derivative gain/(loss) at end of quarter	$ (22)	$ (19)	$ (31)	$ (32)	$ (25)	$ (28)