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Investments (Equity Method Investments, Statement of Financial Position) (Details) - USD ($)
$ in Millions
Dec. 31, 2023
Dec. 31, 2022
Schedule of Equity Method Investments [Line Items]    
Total assets $ 721,123 $ 689,029
Total liabilities 691,336 657,110
Partner's Capital 27,820 30,593
Total liabilities and partner's capital 721,123 689,029
LP/LLC Interests    
Schedule of Equity Method Investments [Line Items]    
Total liabilities and partners’ capital included above 14,895 13,683
Equity in LP/LLC interests not included above 968 726
Carrying value 15,863 14,409
Equity Method Investment    
Schedule of Equity Method Investments [Line Items]    
Total assets 681,739 707,192
Total liabilities 61,785 83,634
Partner's Capital 619,954 623,558
Total liabilities and partner's capital $ 681,739 $ 707,192