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Schedule I (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Condensed Financial Statements, Captions [Line Items]      
Cash Dividends Paid to Parent, Consolidated Subsidiaries $ 8,800 $ 8,000  
Parent Company [Member]      
Condensed Financial Statements, Captions [Line Items]      
Cash Dividends Paid to Parent, Consolidated Subsidiaries 15,600 10,800 $ 10,000
Return of capital to parent company 1,424 245 $ 943
Notes Payable 8,700 8,100  
Subsidiaries [Member]      
Condensed Financial Statements, Captions [Line Items]      
Other Long-term Debt $ 900 $ 1,400