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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Other Accrued Liabilities Narrative (Details) - USD ($)
$ in Millions
Sep. 30, 2021
Jun. 30, 2021
Income Tax Contingency [Line Items]    
Other noncurrent liabilities $ 1,964 $ 2,037
Other Noncurrent Liabilities    
Income Tax Contingency [Line Items]    
Deferred tax liabilities $ 805 $ 849