Pension And Postretirement Benefits (Narrative) (Details) (USD $) In Millions, unless otherwise specified	0 Months Ended	12 Months Ended
	Jul. 01, 2011	Aug. 03, 2014		Jul. 28, 2013		Jul. 29, 2012
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Reclassification of net actuarial loss included in net earnings before tax		$ 113	[1]	$ 124	[1]	$ 83	[1]
Defined Contribution Plan, Employer Matching Contribution, Percent of Match	60.00%
Defined Contribution Plan, Cost Recognized		29		27		24
Pension Plan, Defined Benefit [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Defined Benefit Plan, Recognized Net Gain (Loss) Due to Settlements		(22)		0		0
Defined Benefit Plan, Recognized Net Gain (Loss) Due to Curtailments		0		(3)		0
Defined Benefit Plan, Net Periodic Benefit Cost		78		98		73
Defined Benefit Plan, Future Amortization of Prior Service Cost (Credit)		1
Defined Benefit Plan, Future Amortization of Gain (Loss)		85
Reclassification of net actuarial loss included in net earnings before tax		100		109
Defined Benefit Plan, Amortization of Gains (Losses)		76		108		74
Defined Benefit Plan, Accumulated Benefit Obligation		2,477		2,423
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Discount Rate		4.82%		4.05%		5.41%
Other Postretirement Benefit Plan, Defined Benefit [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Defined Benefit Plan, Net Periodic Benefit Cost		31		32		29
Defined Benefit Plan, Future Amortization of Prior Service Cost (Credit)		1
Defined Benefit Plan, Future Amortization of Gain (Loss)		13
Reclassification of net actuarial loss included in net earnings before tax		13		15
Defined Benefit Plan, Amortization of Gains (Losses)		13		15		9
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Discount Rate		4.50%		3.75%		5.00%
U.S. Pension Plan, Defined Benefit [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Defined Benefit Plans, Estimated Future Employer Contributions in Next Fiscal Year		0
Non-U.S. Pension Plan, Defined Benefit [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Defined Benefit Plans, Estimated Future Employer Contributions in Next Fiscal Year		6
Discontinued Operations [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Defined Benefit Plan, Net Periodic Benefit Cost		0				1
Reclassification of net actuarial loss included in net earnings before tax		2	[1]
Discontinued Operations [Member] | Pension Plan, Defined Benefit [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Defined Benefit Plan, Net Periodic Benefit Cost				1
Reclassification of net actuarial loss included in net earnings before tax		2
Defined Benefit Plan, Amortization of Gains (Losses)				2
Employees Not Covered By Collective Bargaining Agreements [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Defined Contribution Plan, Employer Matching Contribution, Percent of Match		100.00%
Defined Contribution Plan, Employer Matching Contribution, Percent of Employees' Gross Pay		4.00%
Employees Not Eligible To Participate In Defined Benefit Plans And Who Are Not Covered By Collective Bargaining Agreements [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Defined Contribution Plan, Employer Matching Contribution, Percent of Employees' Gross Pay		3.00%
At certain locations [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Defined Contribution Plan, Employer Matching Contribution, Percent of Match	50.00%
Defined Contribution Plan, Employer Matching Contribution, Percent of Employees' Gross Pay	5.00%
Corporate, Non-Segment [Member] | Pension Plan, Defined Benefit [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Defined Benefit Plan, Recognized Net Gain (Loss) Due to Settlements		$ (22)

[1] In 2014, net actuarial losses of $2 were recognized in Earnings (loss) from discontinued operations as a result of the sale of the European simple meals business. Excluding the net actuarial losses related to the sale of the business in 2014, these items are included in the components of net periodic benefit costs (see Note 11 for additional details).