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Equity Method Investments, Equity Method Investments (Details) - USD ($)
$ in Millions
Feb. 29, 2016
Aug. 31, 2015
Schedule of Equity Method Investments [Line Items]    
Carrying Value $ 1,217 $ 1,242
Minimum [Member]    
Schedule of Equity Method Investments [Line Items]    
Equity method investment ownership interest percentage 12.00% 12.00%
Maximum [Member]    
Schedule of Equity Method Investments [Line Items]    
Equity method investment ownership interest percentage 50.00% 50.00%