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Reconciliations of Income Tax Expense at U.S. Federal Statutory Income Tax Rate Compared to Actual Income Tax Expense (Detail) (USD $)
In Thousands, unless otherwise specified
12 Months Ended
Aug. 31, 2012
Aug. 31, 2011
Aug. 31, 2010
Income Taxes [Line Items]      
Tax at U.S. federal statutory income tax rate (35%) $ 178,115 $ 168,416 $ 86,543
State income taxes, net of federal tax benefit (4,013) (2,688) (1,342)
Impact of foreign tax rates (116,198) (94,392) (63,450)
Permanent impact of non-deductible cost 2,147 4,639 9,116
Income tax credits (13,125) (38,707) (7,863)
Changes in tax rates on deferred tax assets and liabilities (9,048) 10,147 5,020
Valuation allowance 57,743 17,277 19,474
Non-deductible equity compensation 6,655 7,581 9,317
Impact of intercompany charges 1,742 12,658 25,748
Other, net 8,793 13,298 (6,062)
Total income tax expense $ 112,811 $ 98,229 $ 76,501