Stock-Based Compensation (Tables)

6 Months Ended

Jan. 31, 2012

Stock-Based Compensation [Abstract]

Stock Option Assumptions

		September 30,			September 30,			September 30,			September 30,
	Six Months Ended January 31, 2012						Six Months Ended January 31, 2011
Black-Scholes Option Valuation Assumptions	Service-Based Option Awards			Performance- Based Option Awards			Service-Based Option Awards			Performance- Based Option Awards
Expected term (in years)		5.89			6.57			5.92			6.57
Expected volatility		39.40	%		39.21	%		40.22	%		39.39	%
Expected dividend yield		2.07	%		1.99	%		1.94	%		1.96	%
Risk-free interest rate		1.16	%		2.05	%		1.65	%		2.35	%
Weighted-average market value of underlying stock at grant date	$	27.00		$	29.55		$	29.09		$	28.43
Weighted-average exercise price		27.00			29.55			29.09			28.35
Weighted-average fair value of options granted during the period		8.37			10.01			9.58			9.87

Summary of stock option activity under the Company's share-based compensation plans

		September 30,			September 30,		September 30,		September 30,
Options	Shares			Weighted Average Exercise Price		Weighted Average Remaining Contractual Term		Aggregate Intrinsic Value
Outstanding at July 31, 2011		5,726,017		$	29.24
New grants		1,206,150		$	27.88
Exercised		(104,119	)	$	22.10
Forfeited or expired		(154,199	)	$	33.76
Outstanding at January 31, 2012		6,673,849		$	29.00		6.6	$	18,318
Exercisable at January 31, 2012		4,024,955		$	29.31		5.2	$	14,018