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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)

X

- Definition

Amount of asset segregated and restricted to provide benefit under defined benefit plan. Asset includes, but is not limited to, stock, bond, other investment, earning from investment, and contribution by employer and employee.

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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Amount of investment within defined benefit plan asset category.

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