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SHAREHOLDERS' EQUITY, Common Equity Narrative (Details) - USD ($)
$ / shares in Units, shares in Thousands, $ in Millions
3 Months Ended 9 Months Ended
Jun. 30, 2023
Jun. 30, 2023
Dec. 31, 2022
Other Income and Expenses [Abstract]      
Share repurchases, authorized amount     $ 1,500
Shares repurchased (in shares) 3,310 8,350  
Shares repurchased $ 300 $ 788  
Shares repurchased (in usd per share) $ 90.51 $ 94.30  
Share repurchases, remaining authorized amount $ 750 $ 750  
Excise tax on share repurchases   $ 5