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INVESTMENT IN ASSOCIATES AND JOINT VENTURES - Balance Sheet Impact of Investments (Details) - USD ($)
$ in Millions
Jun. 30, 2021
Dec. 31, 2020
Disclosure Of Associates And Joint Ventures [Line Items]    
Assets $ 60,278 $ 61,331
Total liabilities (38,827) (39,658)
Associates and Joint Ventures    
Disclosure Of Associates And Joint Ventures [Line Items]    
Assets 54,607 54,673
Total liabilities (32,536) (28,216)
Total Net Assets $ 22,071 $ 26,457