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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Income Taxes (Details) - USD ($)
$ in Millions
3 Months Ended
Sep. 30, 2020
Sep. 30, 2019
Jun. 30, 2020
Income Tax Examination [Line Items]      
Effective tax rate (as a percent) 21.80% 21.30%  
Increase (decrease) in effective tax rate (as a percent) 0.50%    
Gross unrecognized tax benefits $ 73   $ 70
Total amount of unrecognized tax benefits that, if recognized, would affect the effective tax rate 58    
Gross interest and penalty accrued 1    
Total gross accrued interest and penalties related to unrecognized tax benefits 14   $ 13
Minimum      
Income Tax Examination [Line Items]      
Decrease in unrecognized tax benefits is reasonably possible 5    
Maximum      
Income Tax Examination [Line Items]      
Decrease in unrecognized tax benefits is reasonably possible $ 10    
Internal Revenue Service (IRS)      
Income Tax Examination [Line Items]      
Tax cuts and jobs act, change in enacted rate (as a percent) (1.30%)    
CHINA      
Income Tax Examination [Line Items]      
Increase (decrease) in effective tax rate (as a percent) 1.20%