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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Inventory and Promotional Merchandise (Details) - USD ($)
$ in Millions
Sep. 30, 2021
Jun. 30, 2021
Accounting Policies [Abstract]    
Raw materials $ 697 $ 674
Work in process 290 330
Finished goods 1,354 1,213
Promotional merchandise 292 288
Inventory and promotional merchandise $ 2,633 $ 2,505