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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Inventory and Promotional Merchandise (Details) - USD ($)
$ in Millions
Dec. 31, 2019
Jun. 30, 2019
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES    
Raw materials $ 519 $ 541
Work in process 237 268
Finished goods 1,101 981
Promotional merchandise 201 216
Inventory and promotional merchandise $ 2,058 $ 2,006