Financial Instruments (Schedule Of Changes In Cash Flow Hedges In Other Comprehensive Income (Loss)) (Details) - USD ($) $ in Millions	3 Months Ended
	Nov. 01, 2015	Nov. 02, 2014
Derivative Instruments, Gain (Loss) [Line Items]
OCI derivative gain/(loss) at beginning of year	$ (10)	$ (4)
Other Comprehensive Income (Loss), Unrealized Gain (Loss) on Derivatives Arising During Period, before Tax	(8)	(1)
Reclassification adjustment for (gains) losses included in net earnings, before tax	(2)	1
OCI derivative gain/(loss) at end of period	(20)	(4)
Foreign Exchange Forward Contracts [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Other Comprehensive Income (Loss), Unrealized Gain (Loss) on Derivatives Arising During Period, before Tax	0	3
Foreign Exchange Forward Contracts [Member] | Cost Of Products Sold [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Reclassification adjustment for (gains) losses included in net earnings, before tax	(2)	0
Foreign Exchange Forward Contracts [Member] | Other expenses / (income) [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Reclassification adjustment for (gains) losses included in net earnings, before tax	(1)	0
Interest Rate Contract [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Other Comprehensive Income (Loss), Unrealized Gain (Loss) on Derivatives Arising During Period, before Tax	(8)	(4)
Interest Rate Contract [Member] | Interest Expense [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Reclassification adjustment for (gains) losses included in net earnings, before tax	$ 1	$ 1