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Research and Development (Details) - USD ($)
$ in Millions
3 Months Ended 9 Months Ended
May 30, 2019
May 31, 2018
May 30, 2019
May 31, 2018
Collaborative Arrangement Process Design and Process Development        
Collaborative Arrangements and Non-collaborative Arrangement Transactions [Line Items]        
Reduction in R and D expenses for reimbursements from partners $ 6 $ 53 $ 59 $ 167