Pension And Postretirement Benefits (Narrative) (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended										12 Months Ended							0 Months Ended	12 Months Ended		0 Months Ended
	Jul. 27, 2014 Pension Plans, Defined Benefit [Member]	Jul. 28, 2013 Pension Plans, Defined Benefit [Member]	Jul. 29, 2012 Pension Plans, Defined Benefit [Member]	Jul. 31, 2011 Pension Plans, Defined Benefit [Member]	Jul. 27, 2014 Other Postretirement Benefit Plans, Defined Benefit [Member]	Jul. 28, 2013 Other Postretirement Benefit Plans, Defined Benefit [Member]	Jul. 29, 2012 Other Postretirement Benefit Plans, Defined Benefit [Member]	Jul. 31, 2011 Other Postretirement Benefit Plans, Defined Benefit [Member]	Jul. 27, 2014 U.S. Pension Plans [Member]	Jul. 28, 2013 Non U.S. Pension Plans [Member]	Jul. 29, 2012 Segment, Discontinued Operations [Member]	Jul. 28, 2013 Segment, Discontinued Operations [Member] Pension Plans, Defined Benefit [Member]	Jul. 29, 2012 Segment, Discontinued Operations [Member] Pension Plans, Defined Benefit [Member]	Jul. 28, 2013 Defined Contribution Pension [Member]	Jul. 29, 2012 Defined Contribution Pension [Member]	Jul. 31, 2011 Defined Contribution Pension [Member]	Jul. 28, 2013 Employees Not Covered By Collective Bargaining Agreements [Member] Defined Contribution Pension [Member]	Jul. 01, 2011 Employees Not Eligible To Participate In Defined Benefit Plans And Who Are Not Covered By Collective Bargaining Agreements [Member] Defined Contribution Pension [Member]	Jul. 28, 2013 Employees Not Eligible To Participate In Defined Benefit Plans And Who Are Not Covered By Collective Bargaining Agreements [Member] Defined Contribution Pension [Member]	Jul. 28, 2013 Maximum [Member] Employees Not Covered By Collective Bargaining Agreements [Member] Defined Contribution Pension [Member]	Jul. 01, 2011 Maximum [Member] Employees Not Eligible To Participate In Defined Benefit Plans And Who Are Not Covered By Collective Bargaining Agreements [Member] Defined Contribution Pension [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Defined Contribution Plan, Employer Matching Contribution, Percent																	100.00%	60.00%
Defined Contribution Plan, Maximum Annual Contribution Per Employee, Percent																			3.00%	4.00%	5.00%
Defined Benefit Plan, Contributions by Employer		$ 87	$ 71						$ 35
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Discount Rate		4.05%	5.41%	5.46%		3.75%	5.00%	5.25%
Defined Benefit Plan, Accumulated Benefit Obligation		2,423	2,657
Curtailment loss		(3)	0	0
Defined Benefit Plan, Net Periodic Benefit Cost		98	73	71		32	29	27			1	1
Defined Benefit Plan, Amortization of Net Prior Service Cost (Credit)	1				(1)
Defined Benefit Plan, Amortization of Net (Gains) Losses	77	109	74		13	15	9					2	3
Defined Benefit Plan, Estimated Future Employer Contributions in Next Fiscal Year										18
Matching contribution percentage certain locations																		50.00%
Defined Contribution Plan, Cost Recognized														$ 27	$ 24	$ 20