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RESTRUCTURING PROGRAM - RESTRUCTURING RESERVE BY TYPE OF COSTS (Details) - USD ($)
$ in Millions
3 Months Ended 6 Months Ended 9 Months Ended
Mar. 31, 2021
Dec. 31, 2020
Mar. 31, 2021
Jun. 30, 2020
Restructuring Reserve [Roll Forward]        
Reserve Balance $ 270   $ 270 $ 472
Restructuring Charges $ 134 $ 87    
Cash Spent     $ (423)