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, 2011	Jul. 31, 2010
Fair value of plan assets, end of year	$ 265,300,000	$ 232,500,000
Significant Unobservable Inputs (Level 3) [Member]
Fair value of plan assets, beginning of year	66,600,000	71,000,000
Unrealized gains	7,000,000	4,800,000
Realized gains	1,000,000	700,000
Purchases, sales, issuances and settlements, net	12,700,000	(9,900,000)
Fair value of plan assets, end of year	87,300,000	66,600,000
Significant Unobservable Inputs (Level 3) [Member] | Global Equity Securities [Member]
Fair value of plan assets, beginning of year	2,400,000	2,700,000
Unrealized gains		100,000
Purchases, sales, issuances and settlements, net	(2,100,000)	(400,000)
Fair value of plan assets, end of year	300,000	2,400,000
Significant Unobservable Inputs (Level 3) [Member] | Private Equity [Member]
Fair value of plan assets, beginning of year	14,800,000	11,400,000
Unrealized gains	1,500,000	1,800,000
Realized gains	1,000,000
Purchases, sales, issuances and settlements, net	300,000	1,600,000
Fair value of plan assets, end of year	17,600,000	14,800,000
Significant Unobservable Inputs (Level 3) [Member] | Absolute Return [Member]
Fair value of plan assets, beginning of year	33,100,000	41,400,000
Unrealized gains	2,100,000	2,800,000
Realized gains		700,000
Purchases, sales, issuances and settlements, net	(3,800,000)	(11,800,000)
Fair value of plan assets, end of year	31,400,000	33,100,000
Significant Unobservable Inputs (Level 3) [Member] | Real Assets [Member]
Fair value of plan assets, beginning of year	16,300,000	15,500,000
Unrealized gains	3,400,000	100,000
Purchases, sales, issuances and settlements, net	18,300,000	700,000
Fair value of plan assets, end of year	38,000,000	16,300,000
Global Equity Securities [Member]
Fair value of plan assets, end of year	121,300,000	101,300,000
Private Equity [Member]
Fair value of plan assets, end of year	17,600,000	14,800,000
Absolute Return [Member]
Fair value of plan assets, end of year	51,500,000	72,500,000
Real Assets [Member]
Fair value of plan assets, end of year	$ 38,000,000	$ 25,900,000