Restructuring Charges (Schedule Of Restructuring Activity And Related Reserves) (Details) (USD $) In Millions, unless otherwise specified	6 Months Ended
	Jan. 26, 2014
2014 Initiatives [Member] | CHINA
Restructuring Reserve [Roll Forward]
Restructuring and Related Cost, Incurred Cost	$ 13
2014 Initiatives [Member] | Severance Pay And Benefits [Member]
Restructuring Reserve [Roll Forward]
Accrued Balance at beginning of period	0
Restructuring and Related Cost, Incurred Cost	20
Cash Payments	(5)
Restructuring Reserve, Translation Adjustment	0
Accrued Balance at end of period	15
2014 Initiatives [Member] | Severance Pay And Benefits [Member] | CHINA
Restructuring Reserve [Roll Forward]
Restructuring and Related Cost, Incurred Cost	1
Cash Payments	0
Restructuring Reserve, Translation Adjustment	0
Accrued Balance at end of period	1
2014 Initiatives [Member] | Asset Impairment Accelerated Depreciation [Member] | CHINA | Fair Value, Measurements, Nonrecurring [Member]
Restructuring Reserve [Roll Forward]
Restructuring and Related Cost, Incurred Cost	11
2014 Initiatives [Member] | Other Restructuring [Member] | CHINA
Restructuring Reserve [Roll Forward]
Restructuring and Related Cost, Incurred Cost	1
2013 Initiatives [Member]
Restructuring Reserve [Roll Forward]
Restructuring and Related Cost, Incurred Cost	3
2013 Initiatives [Member] | Severance Pay And Benefits [Member]
Restructuring Reserve [Roll Forward]
Accrued Balance at beginning of period	17
Restructuring and Related Cost, Incurred Cost	0
Cash Payments	(9)
Accrued Balance at end of period	8
2013 Initiatives [Member] | Other Restructuring [Member]
Restructuring Reserve [Roll Forward]
Restructuring and Related Cost, Incurred Cost	3
2011 Initiatives [Member]
Restructuring Reserve [Roll Forward]
Accrued Balance at beginning of period	4
Restructuring and Related Cost, Incurred Cost	0
Cash Payments	(1)
Restructuring Reserve, Translation Adjustment	0
Accrued Balance at end of period	3
2011 Initiatives [Member] | Severance Pay And Benefits [Member]
Restructuring Reserve [Roll Forward]
Accrued Balance at beginning of period	3
Restructuring and Related Cost, Incurred Cost	0
Cash Payments	(1)
Restructuring Reserve, Translation Adjustment	0
Accrued Balance at end of period	2
2011 Initiatives [Member] | Other Restructuring [Member]
Restructuring Reserve [Roll Forward]
Accrued Balance at beginning of period	1
Restructuring and Related Cost, Incurred Cost	0
Cash Payments	0
Restructuring Reserve, Translation Adjustment	0
Accrued Balance at end of period	$ 1