Restructuring and Other Charges (Schedule Of Activities Related To Restructuring And Other Charges) (Details) $ in Millions	9 Months Ended
	Apr. 30, 2016 USD ($)
Restructuring Reserve [Roll Forward]
Liability as of beginning period	$ 89
Gross charges	255
Cash payments	(251)
Non-cash items	(21)
Liability as of ending period	72
FISCAL 2014 PLAN | Employee Severance
Restructuring Reserve [Roll Forward]
Liability as of beginning period	11
Gross charges	0
Cash payments	(11)
Non-cash items	0
Liability as of ending period	0
FISCAL 2014 PLAN | Other
Restructuring Reserve [Roll Forward]
Liability as of beginning period	14
Restructuring Reserve, Accrual Adjustment	(1)
Cash payments	(3)
Non-cash items	0
Liability as of ending period	10
FISCAL 2015 PLAN | Employee Severance
Restructuring Reserve [Roll Forward]
Liability as of beginning period	49
Gross charges	224
Cash payments	(227)
Non-cash items	0
Liability as of ending period	46
FISCAL 2015 PLAN | Other
Restructuring Reserve [Roll Forward]
Liability as of beginning period	15
Gross charges	32
Cash payments	(10)
Non-cash items	(21)
Liability as of ending period	$ 16