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Description of Business and Summary of Significant Accounting Policies - Changes in AOCI, Net of Tax (Details) - USD ($)
$ in Millions
 12 Months Ended
Aug. 31, 2023
Aug. 31, 2022
Aug. 31, 2021
Increase (Decrease) in Stockholders' Equity [Roll Forward]      
Beginning Balance $ 2,452 $ 2,137 $ 1,825
Other comprehensive income (loss) before reclassifications (7)    
Amounts reclassified from AOCI 32    
Total other comprehensive income (loss) 25 (17) 9
Ending Balance 2,867 2,452 2,137
Foreign Currency Translation Adjustment      
Increase (Decrease) in Stockholders' Equity [Roll Forward]      
Beginning Balance (88)    
Other comprehensive income (loss) before reclassifications 29    
Amounts reclassified from AOCI 0    
Total other comprehensive income (loss) 29    
Ending Balance (59) (88)  
Net Investment Hedges      
Increase (Decrease) in Stockholders' Equity [Roll Forward]      
Beginning Balance 0    
Other comprehensive income (loss) before reclassifications (4)    
Amounts reclassified from AOCI 0    
Total other comprehensive income (loss) (4)    
Ending Balance (4) 0  
Derivative Instruments      
Increase (Decrease) in Stockholders' Equity [Roll Forward]      
Beginning Balance (3)    
Other comprehensive income (loss) before reclassifications (25)    
Amounts reclassified from AOCI 42    
Total other comprehensive income (loss) 17    
Ending Balance 14 (3)  
Actuarial Gain (Loss)      
Increase (Decrease) in Stockholders' Equity [Roll Forward]      
Beginning Balance 65    
Other comprehensive income (loss) before reclassifications (5)    
Amounts reclassified from AOCI (14)    
Total other comprehensive income (loss) (19)    
Ending Balance 46 65  
Prior Service (Cost) Credit      
Increase (Decrease) in Stockholders' Equity [Roll Forward]      
Beginning Balance (16)    
Other comprehensive income (loss) before reclassifications (2)    
Amounts reclassified from AOCI 4    
Total other comprehensive income (loss) 2    
Ending Balance (14) (16)  
AOCI Attributable to Parent      
Increase (Decrease) in Stockholders' Equity [Roll Forward]      
Beginning Balance (42) (25) (34)
Total other comprehensive income (loss) 25 (17) 9
Ending Balance $ (17) $ (42) $ (25)