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Description of Business and Summary of Significant Accounting Policies - Change in AOCI, Net of Tax (Details) - USD ($)
$ in Millions
 12 Months Ended
Aug. 31, 2022
Aug. 31, 2021
Aug. 31, 2020
Increase (Decrease) in Stockholders' Equity [Roll Forward]      
Beginning Balance $ 2,137 $ 1,825 $ 1,900
Other comprehensive (loss) income before reclassifications (39)    
Amounts reclassified from AOCI 22    
Total other comprehensive (loss) income (17) 9 49
Ending Balance 2,452 2,137 1,825
Foreign Currency Translation Adjustment      
Increase (Decrease) in Stockholders' Equity [Roll Forward]      
Beginning Balance (20)    
Other comprehensive (loss) income before reclassifications (68)    
Amounts reclassified from AOCI 0    
Total other comprehensive (loss) income (68)    
Ending Balance (88) (20)  
Derivative Instruments      
Increase (Decrease) in Stockholders' Equity [Roll Forward]      
Beginning Balance (36)    
Other comprehensive (loss) income before reclassifications 1    
Amounts reclassified from AOCI 32    
Total other comprehensive (loss) income 33    
Ending Balance (3) (36)  
Actuarial Gain (Loss)      
Increase (Decrease) in Stockholders' Equity [Roll Forward]      
Beginning Balance 51    
Other comprehensive (loss) income before reclassifications 28    
Amounts reclassified from AOCI (14)    
Total other comprehensive (loss) income 14    
Ending Balance 65 51  
Prior Service (Cost) Credit      
Increase (Decrease) in Stockholders' Equity [Roll Forward]      
Beginning Balance (20)    
Other comprehensive (loss) income before reclassifications 0    
Amounts reclassified from AOCI 4    
Total other comprehensive (loss) income 4    
Ending Balance (16) (20)  
AOCI Attributable to Parent      
Increase (Decrease) in Stockholders' Equity [Roll Forward]      
Beginning Balance (25) (34) (83)
Total other comprehensive (loss) income (17) 9 49
Ending Balance $ (42) $ (25) $ (34)