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CAPITAL MANAGEMENT - Changes in Invested Capital (Details) - USD ($)
$ in Millions
 3 Months Ended 6 Months Ended
Jun. 30, 2022
Jun. 30, 2021
Jun. 30, 2022
Jun. 30, 2021
Changes in Invested capital [Roll Forward]        
Opening balance $ 12,272 $ 9,410 $ 12,195 $ 9,213
Net (redemption) issuance of preferred units 0 0 (220) 194
Issuance of perpetual subordinated notes 0 0 293 [1] 0
Issuance of limited partnership units 4 3 8 6
Ending balance 12,276 9,413 12,276 9,413
Weighted Average Invested Capital $ 12,272 $ 9,410 $ 12,346 $ 9,386
[1] Refer to Note 16 Partnership Capital.