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Trade Accounts Receivable Securitization and Sale Programs - Trade Accounts Receivable Sale Programs Amounts Recognized (Details) - Trade Accounts Receivable Sale Programs - USD ($)
$ in Millions
3 Months Ended
Nov. 30, 2018
Nov. 30, 2017
Trade Accounts Receivable Securitization and Sale Program [Line Items]    
Trade accounts receivable sold $ 1,834 $ 1,095
Cash proceeds received 1,826 1,092
Pre-tax losses on sale of receivables $ 8 $ 3