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Parent Company (Interest Paid and Income Tax Refunds (Payments)) (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Condensed Financial Statements, Captions [Line Items]      
Interest paid $ 9,451 $ 2,172 $ 582
Income Tax Refunds/ (Payments) 832 26 73
Parent Company      
Condensed Financial Statements, Captions [Line Items]      
Interest paid 683 314 307
Income Tax Refunds/ (Payments) $ 1,080 $ (255) $ 386