Employee Benefit Plans (Changes In Fair Value Of U.S. Pension Plans' Level 3 Assets) (Details) (U.S. Assets [Member], USD $)	12 Months Ended
	Jul. 31, 2012	Jul. 31, 2011	Jul. 31, 2010
Defined Benefit Plan Disclosure [Line Items]
Ending balance	$ 274,200,000	$ 265,300,000	$ 232,500,000
Global Equity Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Ending balance	119,000,000	121,300,000	101,300,000
Private Equity [Member]
Defined Benefit Plan Disclosure [Line Items]
Ending balance	19,100,000	17,600,000	14,800,000
Alternative [Member]
Defined Benefit Plan Disclosure [Line Items]
Ending balance	75,600,000	51,500,000	72,500,000
Real Assets [Member]
Defined Benefit Plan Disclosure [Line Items]
Ending balance	30,400,000	38,000,000	25,900,000
Significant Unobservable Inputs (Level 3) [Member]
Defined Benefit Plan Disclosure [Line Items]
Beginning balance	87,300,000	66,600,000	71,000,000
Unrealized gains	(1,400,000)	7,000,000	4,800,000
Realized gains	1,900,000	1,000,000	700,000
Purchases, sales, issuances and settlements, net	18,000,000	12,700,000	(9,900,000)
Ending balance	105,800,000	87,300,000	66,600,000
Significant Unobservable Inputs (Level 3) [Member] | Global Equity Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Beginning balance	300,000	2,400,000	2,700,000
Unrealized gains	(100,000)		100,000
Realized gains	100,000
Purchases, sales, issuances and settlements, net	(100,000)	(2,100,000)	(400,000)
Ending balance	200,000	300,000	2,400,000
Significant Unobservable Inputs (Level 3) [Member] | Private Equity [Member]
Defined Benefit Plan Disclosure [Line Items]
Beginning balance	17,600,000	14,800,000	11,400,000
Unrealized gains	200,000	1,500,000	1,800,000
Realized gains	1,400,000	1,000,000
Purchases, sales, issuances and settlements, net	(100,000)	300,000	1,600,000
Ending balance	19,100,000	17,600,000	14,800,000
Significant Unobservable Inputs (Level 3) [Member] | Alternative [Member]
Defined Benefit Plan Disclosure [Line Items]
Beginning balance	31,400,000	33,100,000	41,400,000
Unrealized gains	(300,000)	2,100,000	2,800,000
Realized gains	400,000		700,000
Purchases, sales, issuances and settlements, net	17,300,000	(3,800,000)	(11,800,000)
Net transfers into (out of) level 3	7,300,000
Ending balance	56,100,000	31,400,000	33,100,000
Significant Unobservable Inputs (Level 3) [Member] | Real Assets [Member]
Defined Benefit Plan Disclosure [Line Items]
Beginning balance	38,000,000	16,300,000	15,500,000
Unrealized gains	(1,200,000)	3,400,000	100,000
Purchases, sales, issuances and settlements, net	900,000	18,300,000	700,000
Net transfers into (out of) level 3	(7,300,000)
Ending balance	$ 30,400,000	$ 38,000,000	$ 16,300,000