Share-Based Compensation (Expected Cash Settlement Range Upon Restricted Stock Unit Vesting) (Details) (USD $) In Thousands, unless otherwise specified	Aug. 31, 2012
Fiscal 2014 [Member]
Expected Cash Settlement Range Upon Restricted Stock Unit Vesting [Line Items]
Minimum	$ 10,583	[1]
Maximum	28,220	[1]
Fiscal 2015 [Member]
Expected Cash Settlement Range Upon Restricted Stock Unit Vesting [Line Items]
Minimum	11,497	[1]
Maximum	30,659	[1]
Fiscal 2016 [Member]
Expected Cash Settlement Range Upon Restricted Stock Unit Vesting [Line Items]
Minimum	12,645	[1]
Maximum	33,721	[1]
Total Expected Cash Settlements [Member]
Expected Cash Settlement Range Upon Restricted Stock Unit Vesting [Line Items]
Minimum	34,725	[1]
Maximum	$ 92,600	[1]

[1] (1) Net of estimated forfeitures.