Financial Instruments (Schedule Of Changes In Cash Flow Hedges In Other Comprehensive Income (Loss)) (Details) - USD ($) $ in Millions	3 Months Ended
	Oct. 30, 2016	Nov. 01, 2015
Derivative Instruments, Gain (Loss) [Line Items]
OCI derivative gain/(loss) at beginning of year	$ (64)	$ (10)
Other Comprehensive Income (Loss), Unrealized Gain (Loss) on Derivatives Arising During Period, before Tax	13	(8)
Reclassification adjustment for (gains) losses included in net earnings, before tax	2	(2)
OCI derivative gain/(loss) at end of period	(49)	(20)
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	3	0
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	1	(2)
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	0	(1)
Interest Rate Contract [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Other Comprehensive Income (Loss), Unrealized Gain (Loss) on Derivatives Arising During Period, before Tax	10	(8)
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