Stock-Based Compensation (Tables)

3 Months Ended

Oct. 31, 2011

Stock-Based Compensation [Abstract]

Stock Option Assumptions

	Three Months Ended						Three Months Ended
	October 31, 2011						October 31, 2010
				Performance-						Performance-
	Service-Based			Based Option			Service-Based			Based Option
Black-Scholes Option Valuation Assumptions	Option Awards			Awards			Option Awards			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		$	28.35
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			9.82

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

						Weighted
						Average
				Weighted		Remaining		Aggregate
				Average		Contractual		Intrinsic
Options	Shares			Exercise Price		Term		Value
Outstanding at July 31, 2011		5,726,017		$	29.24
New grants		1,206,150		$	27.88
Exercised		(69,803	)	$	20.49
Forfeited or expired		(49,365	)	$	28.58
Outstanding at October 31, 2011		6,812,999		$	29.09		6.8	$	22,979
Exercisable at October 31, 2011		3,975,963		$	29.83		5.3	$	14,652