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CAPITAL MANAGEMENT - Changes in Invested Capital (Details) - USD ($)
$ in Millions
 3 Months Ended 6 Months Ended
Jun. 30, 2023
Jun. 30, 2022
Jun. 30, 2023
Jun. 30, 2022
Changes in Invested capital [Roll Forward]        
Opening balance $ 12,287 $ 12,272 $ 12,281 $ 12,195
Net redemption of preferred units 0 0 0 (220)
Issuance of perpetual subordinated notes 0 0 0 293 [1]
Issuance of limited partnership units 2 4 8 8
Ending balance 12,289 12,276 12,289 12,276
Weighted Average Invested Capital $ 12,287 $ 12,272 $ 12,284 $ 12,262
[1] Refer to Note 15, Partnership Capital.