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EMPLOYEE BENEFIT PLANS - Fair Value Hierarchy (Details) - USD ($) $ in Millions	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Investments measured at NAV
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Fair value of plan assets	$ 440	$ 520
Pension Benefits
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Fair value of plan assets	1,984	2,106	$ 2,110
Pension Benefits | Qualified Plan
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Fair value of plan assets	1,984	2,106
Pension Benefits | Qualified Plan | Fair Value, Inputs, Level 1, 2 and 3
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Fair value of plan assets	1,544	1,586
Pension Benefits | Qualified Plan | Fair Value, Inputs, Level 1, 2 and 3 | Corporate
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Fair value of plan assets	864	656
Pension Benefits | Qualified Plan | Fair Value, Inputs, Level 1, 2 and 3 | U.S. government, agencies and authorities
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Fair value of plan assets	95	367
Pension Benefits | Qualified Plan | Fair Value, Inputs, Level 1, 2 and 3 | States and political subdivisions
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Fair value of plan assets	6	7
Pension Benefits | Qualified Plan | Fair Value, Inputs, Level 1, 2 and 3 | Foreign governments
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Fair value of plan assets	14	15
Pension Benefits | Qualified Plan | Fair Value, Inputs, Level 1, 2 and 3 | Common equity, REITs and preferred equity
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Fair value of plan assets	439	416
Pension Benefits | Qualified Plan | Fair Value, Inputs, Level 1, 2 and 3 | Mutual funds
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Fair value of plan assets	2	14
Pension Benefits | Qualified Plan | Fair Value, Inputs, Level 1, 2 and 3 | Collective Trust
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Fair value of plan assets	67	72
Pension Benefits | Qualified Plan | Fair Value, Inputs, Level 1, 2 and 3 | Cash and cash equivalents
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Fair value of plan assets	17	12
Pension Benefits | Qualified Plan | Fair Value, Inputs, Level 1, 2 and 3 | Short-term investments
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Fair value of plan assets	40	27
Pension Benefits | Qualified Plan | Level 1
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Fair value of plan assets	367	353
Pension Benefits | Qualified Plan | Level 1 | Corporate
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Fair value of plan assets	0	0
Pension Benefits | Qualified Plan | Level 1 | U.S. government, agencies and authorities
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Fair value of plan assets	0	0
Pension Benefits | Qualified Plan | Level 1 | States and political subdivisions
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Fair value of plan assets	0	0
Pension Benefits | Qualified Plan | Level 1 | Foreign governments
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Fair value of plan assets	0	0
Pension Benefits | Qualified Plan | Level 1 | Common equity, REITs and preferred equity
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Fair value of plan assets	348	327
Pension Benefits | Qualified Plan | Level 1 | Mutual funds
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Fair value of plan assets	2	14
Pension Benefits | Qualified Plan | Level 1 | Collective Trust
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Fair value of plan assets	0	0
Pension Benefits | Qualified Plan | Level 1 | Cash and cash equivalents
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Fair value of plan assets	17	12
Pension Benefits | Qualified Plan | Level 1 | Short-term investments
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Fair value of plan assets	0	0
Pension Benefits | Qualified Plan | Level 2
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Fair value of plan assets	1,177	1,233
Pension Benefits | Qualified Plan | Level 2 | Corporate
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Fair value of plan assets	864	656
Pension Benefits | Qualified Plan | Level 2 | U.S. government, agencies and authorities
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Fair value of plan assets	95	367
Pension Benefits | Qualified Plan | Level 2 | States and political subdivisions
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Fair value of plan assets	6	7
Pension Benefits | Qualified Plan | Level 2 | Foreign governments
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Fair value of plan assets	14	15
Pension Benefits | Qualified Plan | Level 2 | Common equity, REITs and preferred equity
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Fair value of plan assets	91	89
Pension Benefits | Qualified Plan | Level 2 | Mutual funds
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Fair value of plan assets	0	0
Pension Benefits | Qualified Plan | Level 2 | Collective Trust
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Fair value of plan assets	67	72
Pension Benefits | Qualified Plan | Level 2 | Cash and cash equivalents
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Fair value of plan assets	0	0
Pension Benefits | Qualified Plan | Level 2 | Short-term investments
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Fair value of plan assets	40	27
Pension Benefits | Qualified Plan | Investments measured at NAV
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Fair value of plan assets	$ 440	$ 520

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.

+ References

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