Accumulated Other Comprehensive Income (Loss) Accumulated Other Comprehensive Income (Loss) (Schecule of amounts reclassified from AOCI) (Details) - USD ($) $ in Millions		3 Months Ended
		Oct. 30, 2016	Nov. 01, 2015
Other Comprehensive Income (Loss), Derivatives Qualifying as Hedges, before Tax [Abstract]
Reclassification adjustment for (gains) losses included in net earnings, before tax		$ 2	$ (2)
Other Comprehensive Income (Loss), Derivatives Qualifying as Hedges, Tax Effect [Abstract]
Reclassification adjustment for (gains) losses included in net earnings, tax expense (benefit)		0	0
Other Comprehensive Income (Loss), Derivatives Qualifying as Hedges, Net of Tax [Abstract]
Reclassification adjustment for (gains) losses included in net earnings, after-tax		2	(2)
Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Adjustment, before Tax, [Abstract]
Reclassification of prior service credit included in net earnings, before tax	[1]	(6)	0
Other Comprehensive (Income) Loss, Pension and Other Postretirement Benefit Plans, Tax [Abstract]
Total Pension and Other Postretirement Benefit amortization included in net earnings, tax expense (benefit)		2	0
Other Comprehensive (Income) Loss, Pension and Other Postretirement Benefit Plans, Adjustment, Net of Tax [Abstract]
Total Pension and Other Postretirement Benefit amortization included in net earnings, net of tax		(4)	0
Foreign Exchange Contract [Member] | Cost Of Products Sold [Member]
Other Comprehensive Income (Loss), Derivatives Qualifying as Hedges, before Tax [Abstract]
Reclassification adjustment for (gains) losses included in net earnings, before tax		1	(2)
Foreign Exchange Contract [Member] | Other Expenses/Income [Member]
Other Comprehensive Income (Loss), Derivatives Qualifying as Hedges, before Tax [Abstract]
Reclassification adjustment for (gains) losses included in net earnings, before tax		0	(1)
Interest Rate Contract [Member] | Interest Expense [Member]
Other Comprehensive Income (Loss), Derivatives Qualifying as Hedges, before Tax [Abstract]
Reclassification adjustment for (gains) losses included in net earnings, before tax		$ 1	$ 1

[1] This is included in the components of net periodic benefit costs (see Note 8 for additional details).