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CONDENSED CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($)
$ in Thousands
Nov. 30, 2018
Aug. 31, 2018
Statement of Financial Position [Abstract]    
Accounts receivable, allowance for doubtful accounts $ 14,401 $ 15,181
Property, plant and equipment, accumulated depreciation 3,716,554 3,646,945
Intangible assets, accumulated amortization $ 314,219 $ 307,178
Preferred stock, par value (in dollars per share) $ 0.001 $ 0.001
Preferred stock, shares authorized 10,000,000 10,000,000
Preferred stock, shares issued 0 0
Preferred stock, shares outstanding 0 0
Common stock, par value (in dollars per share) $ 0.001 $ 0.001
Common stock, shares authorized 500,000,000 500,000,000
Common stock, shares issued 258,816,662 257,130,145
Common stock, shares outstanding 157,986,896 164,588,172
Treasury stock, shares 100,829,766 92,541,973