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Employee Benefit Plans (Schedule of Allocation of Plan Assets) (Details) - USD ($) $ in Millions | Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022
--- | --- | --- | ---
Defined Benefit Plan, Plan Assets, Allocation [Line Items] |  |  |
Fair value of plan assets | $ 46,414 | $ 48,945 |
Quoted price in active markets (Level 1) [Member] |  |  |
Defined Benefit Plan, Plan Assets, Allocation [Line Items] |  |  |
Fair value of plan assets | 10,658 | 9,663 |
Significant other observable inputs (Level 2) [Member] |  |  |
Defined Benefit Plan, Plan Assets, Allocation [Line Items] |  |  |
Fair value of plan assets | 13,662 | 16,761 |
Significant Unobservable Inputs (Level 3) [Member] |  |  |
Defined Benefit Plan, Plan Assets, Allocation [Line Items] |  |  |
Fair value of plan assets | 1,481 | 1,467 | $ 1,650
Fair Value Measured at Net Asset Value Per Share |  |  |
Defined Benefit Plan, Plan Assets, Allocation [Line Items] |  |  |
Fair value of plan assets | 20,424 | 21,088 |
Global Equities [Member] |  |  |
Defined Benefit Plan, Plan Assets, Allocation [Line Items] |  |  |
Fair value of plan assets | 6,208 | 6,160 |
Global Equities [Member] | Quoted price in active markets (Level 1) [Member] |  |  |
Defined Benefit Plan, Plan Assets, Allocation [Line Items] |  |  |
Fair value of plan assets | 6,195 | 6,156 |
Global Equities [Member] | Significant other observable inputs (Level 2) [Member] |  |  |
Defined Benefit Plan, Plan Assets, Allocation [Line Items] |  |  |
Fair value of plan assets | 13 | 4 |
Global Equities [Member] | Significant Unobservable Inputs (Level 3) [Member] |  |  |
Defined Benefit Plan, Plan Assets, Allocation [Line Items] |  |  |
Fair value of plan assets | 0 | 0 |
Global Equities [Member] | Fair Value Measured at Net Asset Value Per Share |  |  |
Defined Benefit Plan, Plan Assets, Allocation [Line Items] |  |  |
Fair value of plan assets | 0 | 0 |
Global Equity Commingled Funds [Member] |  |  |
Defined Benefit Plan, Plan Assets, Allocation [Line Items] |  |  |
Fair value of plan assets | 624 | 1,012 |
Global Equity Commingled Funds [Member] | Quoted price in active markets (Level 1) [Member] |  |  |
Defined Benefit Plan, Plan Assets, Allocation [Line Items] |  |  |
Fair value of plan assets | 0 | 0 |
Global Equity Commingled Funds [Member] | Significant other observable inputs (Level 2) [Member] |  |  |
Defined Benefit Plan, Plan Assets, Allocation [Line Items] |  |  |
Fair value of plan assets | 624 | 1,012 |
Global Equity Commingled Funds [Member] | Significant Unobservable Inputs (Level 3) [Member] |  |  |
Defined Benefit Plan, Plan Assets, Allocation [Line Items] |  |  |
Fair value of plan assets | 0 | 0 |
Global Equity Commingled Funds [Member] | Fair Value Measured at Net Asset Value Per Share |  |  |
Defined Benefit Plan, Plan Assets, Allocation [Line Items] |  |  |
Fair value of plan assets | 0 | 0 |
Other Public Equities |  |  |
Defined Benefit Plan, Plan Assets, Allocation [Line Items] |  |  |
Fair value of plan assets | 2,431 | 2,308 |
Other Public Equities | Quoted price in active markets (Level 1) [Member] |  |  |
Defined Benefit Plan, Plan Assets, Allocation [Line Items] |  |  |
Fair value of plan assets | 0 | 0 |
Other Public Equities | Significant other observable inputs (Level 2) [Member] |  |  |
Defined Benefit Plan, Plan Assets, Allocation [Line Items] |  |  |
Fair value of plan assets | 0 | 0 |
Other Public Equities | Significant Unobservable Inputs (Level 3) [Member] |  |  |
Defined Benefit Plan, Plan Assets, Allocation [Line Items] |  |  |
Fair value of plan assets | 0 | 0 |
Other Public Equities | Fair Value Measured at Net Asset Value Per Share |  |  |
Defined Benefit Plan, Plan Assets, Allocation [Line Items] |  |  |
Fair value of plan assets | 2,431 | 2,308 |
Private Equity Funds [Member] |  |  |
Defined Benefit Plan, Plan Assets, Allocation [Line Items] |  |  |
Fair value of plan assets | 4,985 | 4,936 |
Private Equity Funds [Member] | Quoted price in active markets (Level 1) [Member] |  |  |
Defined Benefit Plan, Plan Assets, Allocation [Line Items] |  |  |
Fair value of plan assets | 0 | 0 |
Private Equity Funds [Member] | Significant other observable inputs (Level 2) [Member] |  |  |
Defined Benefit Plan, Plan Assets, Allocation [Line Items] |  |  |
Fair value of plan assets | 0 | 0 |
Private Equity Funds [Member] | Significant Unobservable Inputs (Level 3) [Member] |  |  |
Defined Benefit Plan, Plan Assets, Allocation [Line Items] |  |  |
Fair value of plan assets | 0 | 0 |
Private Equity Funds [Member] | Fair Value Measured at Net Asset Value Per Share |  |  |
Defined Benefit Plan, Plan Assets, Allocation [Line Items] |  |  |
Fair value of plan assets | 4,985 | 4,936 |
Governments [Member] |  |  |
Defined Benefit Plan, Plan Assets, Allocation [Line Items] |  |  |
Fair value of plan assets | 5,263 | 5,067 |
Governments [Member] | Quoted price in active markets (Level 1) [Member] |  |  |
Defined Benefit Plan, Plan Assets, Allocation [Line Items] |  |  |
Fair value of plan assets | 4,462 | 3,507 |
Governments [Member] | Significant other observable inputs (Level 2) [Member] |  |  |
Defined Benefit Plan, Plan Assets, Allocation [Line Items] |  |  |
Fair value of plan assets | 801 | 1,560 |
Governments [Member] | Significant Unobservable Inputs (Level 3) [Member] |  |  |
Defined Benefit Plan, Plan Assets, Allocation [Line Items] |  |  |
Fair value of plan assets | 0 | 0 |
Governments [Member] | Fair Value Measured at Net Asset Value Per Share |  |  |
Defined Benefit Plan, Plan Assets, Allocation [Line Items] |  |  |
Fair value of plan assets | 0 | 0 |
Corporate Debt Securities [Member] |  |  |
Defined Benefit Plan, Plan Assets, Allocation [Line Items] |  |  |
Fair value of plan assets | 11,344 | 13,185 |
Corporate Debt Securities [Member] | Quoted price in active markets (Level 1) [Member] |  |  |
Defined Benefit Plan, Plan Assets, Allocation [Line Items] |  |  |
Fair value of plan assets | 1 | 0 |
Corporate Debt Securities [Member] | Significant other observable inputs (Level 2) [Member] |  |  |
Defined Benefit Plan, Plan Assets, Allocation [Line Items] |  |  |
Fair value of plan assets | 11,343 | 13,185 |
Corporate Debt Securities [Member] | Significant Unobservable Inputs (Level 3) [Member] |  |  |
Defined Benefit Plan, Plan Assets, Allocation [Line Items] |  |  |
Fair value of plan assets | 0 | 0 |
Corporate Debt Securities [Member] | Fair Value Measured at Net Asset Value Per Share |  |  |
Defined Benefit Plan, Plan Assets, Allocation [Line Items] |  |  |
Fair value of plan assets | 0 | 0 |
Structured Products |  |  |
Defined Benefit Plan, Plan Assets, Allocation [Line Items] |  |  |
Fair value of plan assets | 27 | 57 |
Structured Products | Quoted price in active markets (Level 1) [Member] |  |  |
Defined Benefit Plan, Plan Assets, Allocation [Line Items] |  |  |
Fair value of plan assets | 0 | 0 |
Structured Products | Significant other observable inputs (Level 2) [Member] |  |  |
Defined Benefit Plan, Plan Assets, Allocation [Line Items] |  |  |
Fair value of plan assets | 27 | 57 |
Structured Products | Significant Unobservable Inputs (Level 3) [Member] |  |  |
Defined Benefit Plan, Plan Assets, Allocation [Line Items] |  |  |
Fair value of plan assets | 0 | 0 |
Structured Products | Fair Value Measured at Net Asset Value Per Share |  |  |
Defined Benefit Plan, Plan Assets, Allocation [Line Items] |  |  |
Fair value of plan assets | 0 | 0 |
Fixed Income Securities [Member] |  |  |
Defined Benefit Plan, Plan Assets, Allocation [Line Items] |  |  |
Fair value of plan assets | 11,259 | 9,669 |
Fixed Income Securities [Member] | Quoted price in active markets (Level 1) [Member] |  |  |
Defined Benefit Plan, Plan Assets, Allocation [Line Items] |  |  |
Fair value of plan assets | 0 | 0 |
Fixed Income Securities [Member] | Significant other observable inputs (Level 2) [Member] |  |  |
Defined Benefit Plan, Plan Assets, Allocation [Line Items] |  |  |
Fair value of plan assets | 0 | 0 |
Fixed Income Securities [Member] | Significant Unobservable Inputs (Level 3) [Member] |  |  |
Defined Benefit Plan, Plan Assets, Allocation [Line Items] |  |  |
Fair value of plan assets | 0 | 0 |
Fixed Income Securities [Member] | Fair Value Measured at Net Asset Value Per Share |  |  |
Defined Benefit Plan, Plan Assets, Allocation [Line Items] |  |  |
Fair value of plan assets | 11,259 | 9,669 |
Real Estate [Member] |  |  |
Defined Benefit Plan, Plan Assets, Allocation [Line Items] |  |  |
Fair value of plan assets | 3,038 | 3,099 |
Real Estate [Member] | Quoted price in active markets (Level 1) [Member] |  |  |
Defined Benefit Plan, Plan Assets, Allocation [Line Items] |  |  |
Fair value of plan assets | 0 | 0 |
Real Estate [Member] | Significant other observable inputs (Level 2) [Member] |  |  |
Defined Benefit Plan, Plan Assets, Allocation [Line Items] |  |  |
Fair value of plan assets | 0 | 0 |
Real Estate [Member] | Significant Unobservable Inputs (Level 3) [Member] |  |  |
Defined Benefit Plan, Plan Assets, Allocation [Line Items] |  |  |
Fair value of plan assets | 1,481 | 1,467 |
Real Estate [Member] | Fair Value Measured at Net Asset Value Per Share |  |  |
Defined Benefit Plan, Plan Assets, Allocation [Line Items] |  |  |
Fair value of plan assets | 1,557 | 1,632 |
Other Pension Plan Assets [Member] |  |  |
Defined Benefit Plan, Plan Assets, Allocation [Line Items] |  |  |
Fair value of plan assets | 626 | 2,975 |
Other Pension Plan Assets [Member] | Quoted price in active markets (Level 1) [Member] |  |  |
Defined Benefit Plan, Plan Assets, Allocation [Line Items] |  |  |
Fair value of plan assets | 0 | 0 |
Other Pension Plan Assets [Member] | Significant other observable inputs (Level 2) [Member] |  |  |
Defined Benefit Plan, Plan Assets, Allocation [Line Items] |  |  |
Fair value of plan assets | 513 | 560 |
Other Pension Plan Assets [Member] | Significant Unobservable Inputs (Level 3) [Member] |  |  |
Defined Benefit Plan, Plan Assets, Allocation [Line Items] |  |  |
Fair value of plan assets | 0 | 0 |
Other Pension Plan Assets [Member] | Fair Value Measured at Net Asset Value Per Share |  |  |
Defined Benefit Plan, Plan Assets, Allocation [Line Items] |  |  |
Fair value of plan assets | 113 | 2,415 |
Cash & Cash Equivalents [Member] |  |  |
Defined Benefit Plan, Plan Assets, Allocation [Line Items] |  |  |
Fair value of plan assets | 420 | 511 |
Cash & Cash Equivalents [Member] | Quoted price in active markets (Level 1) [Member] |  |  |
Defined Benefit Plan, Plan Assets, Allocation [Line Items] |  |  |
Fair value of plan assets | 0 | 0 |
Cash & Cash Equivalents [Member] | Significant other observable inputs (Level 2) [Member] |  |  |
Defined Benefit Plan, Plan Assets, Allocation [Line Items] |  |  |
Fair value of plan assets | 341 | 383 |
Cash & Cash Equivalents [Member] | Significant Unobservable Inputs (Level 3) [Member] |  |  |
Defined Benefit Plan, Plan Assets, Allocation [Line Items] |  |  |
Fair value of plan assets | 0 | 0 |
Cash & Cash Equivalents [Member] | Fair Value Measured at Net Asset Value Per Share |  |  |
Defined Benefit Plan, Plan Assets, Allocation [Line Items] |  |  |
Fair value of plan assets | 79 | 128 |
Pension Plan Assets Leveled [Member] |  |  |
Defined Benefit Plan, Plan Assets, Allocation [Line Items] |  |  |
Fair value of plan asset, subtotal | 46,225 | 48,979 |
Other Assets And Liabilities [Member] |  |  |
Defined Benefit Plan, Plan Assets, Allocation [Line Items] |  |  |
Fair value of plan assets | $ 189 | $ (34) |

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