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Condensed Financial Information (Parent Company) (Long-term Debt - Narrative) (Details) - USD ($) $ in Millions | Dec. 31, 2024 | Dec. 31, 2023
--- | --- | ---
Condensed Financial Statements, Captions [Line Items] |  |
Debt Instrument, Unamortized Discount (Premium) and Debt Issuance Costs, Net | $ 101 | $ 108
Long-term Debt, Maturities, Repayments of Principal in Next Twelve Months | 1,300 |
Long-term Debt, Maturities, Repayments of Principal in Year Two | 162 |
Long-term Debt, Maturities, Repayments of Principal in Year Three | 52 |
Long-term Debt, Maturities, Repayments of Principal in Year Four | 349 |
Long-term Debt, Maturities, Repayments of Principal in Year Five | 457 |
Long-term Debt, Maturities, Repayments of Principal after Year Five | 12,800 |
Parent Company |  |
Condensed Financial Statements, Captions [Line Items] |  |
Long-term Debt, Maturities, Repayments of Principal in Next Twelve Months | 1,200 |
Long-term Debt, Maturities, Repayments of Principal in Year Two | 427 |
Long-term Debt, Maturities, Repayments of Principal in Year Three | 0 |
Long-term Debt, Maturities, Repayments of Principal in Year Four | 213 |
Long-term Debt, Maturities, Repayments of Principal in Year Five | 625 |
Long-term Debt, Maturities, Repayments of Principal after Year Five | 13,400 |
Senior Notes | 14,431 | 14,516
Parent Company | Senior Notes Unaffiliated [Member] |  |
Condensed Financial Statements, Captions [Line Items] |  |
Debt Instrument, Unamortized Discount (Premium) and Debt Issuance Costs, Net | 99 | 106
Senior Notes | 14,431 | 14,516
Parent Company | Senior Notes, Affiliated [Member] |  |
Condensed Financial Statements, Captions [Line Items] |  |
Senior Notes | $ 1,447 | $ 1,585

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