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EMPLOYEE BENEFIT PLANS - Fair Value Category as of Measurement Date for Defined Benefit Plan (Details) - USD ($)	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Retirement Pension Benefits
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	$ 554,000,000	$ 322,000,000	$ 413,000,000
Other Postretirement Benefits Plan
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	16,000,000	17,000,000	$ 24,000,000
Fair Value, Inputs, Level 1 | Retirement Pension Benefits
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	219,000,000	0
Fair Value, Inputs, Level 2 | Retirement Pension Benefits
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Fair Value, Inputs, Level 3 | Retirement Pension Benefits
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Fair Value, Inputs, Level 1, Level 2, and Level 3 | Retirement Pension Benefits
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	219,000,000	0
Fair Value Measured at Net Asset Value Per Share | Retirement Pension Benefits
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	335,000,000	322,000,000
Equity securities | Fair Value, Inputs, Level 1 | Retirement Pension Benefits
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	65,000,000
Equity securities | Fair Value, Inputs, Level 2 | Retirement Pension Benefits
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0
Equity securities | Fair Value, Inputs, Level 3 | Retirement Pension Benefits
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0
Equity securities | Fair Value, Inputs, Level 1, Level 2, and Level 3 | Retirement Pension Benefits
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	65,000,000
Equity securities | Fair Value Measured at Net Asset Value Per Share | Retirement Pension Benefits
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	109,000,000	100,000,000
Cash and money market funds | Fair Value, Inputs, Level 1 | Retirement Pension Benefits
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	9,000,000
Cash and money market funds | Fair Value, Inputs, Level 2 | Retirement Pension Benefits
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0
Cash and money market funds | Fair Value, Inputs, Level 3 | Retirement Pension Benefits
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0
Cash and money market funds | Fair Value, Inputs, Level 1, Level 2, and Level 3 | Retirement Pension Benefits
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	9,000,000
Real Estate Funds | Fair Value Measured at Net Asset Value Per Share | Retirement Pension Benefits
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	17,000,000	26,000,000
Government obligations | Fair Value, Inputs, Level 1 | Retirement Pension Benefits
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	45,000,000
Government obligations | Fair Value, Inputs, Level 2 | Retirement Pension Benefits
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0
Government obligations | Fair Value, Inputs, Level 3 | Retirement Pension Benefits
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0
Government obligations | Fair Value, Inputs, Level 1, Level 2, and Level 3 | Retirement Pension Benefits
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	45,000,000
Government obligations | Fair Value Measured at Net Asset Value Per Share | Retirement Pension Benefits
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	60,000,000	57,000,000
Corporate obligations | Fair Value, Inputs, Level 1 | Retirement Pension Benefits
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	100,000,000
Corporate obligations | Fair Value, Inputs, Level 2 | Retirement Pension Benefits
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0
Corporate obligations | Fair Value, Inputs, Level 3 | Retirement Pension Benefits
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0
Corporate obligations | Fair Value, Inputs, Level 1, Level 2, and Level 3 | Retirement Pension Benefits
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	100,000,000
Corporate obligations | Fair Value Measured at Net Asset Value Per Share | Retirement Pension Benefits
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	114,000,000	102,000,000
Short-term Investments | Fair Value Measured at Net Asset Value Per Share | Retirement Pension Benefits
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	6,000,000	6,000,000
Other Investments | Retirement Pension Benefits
Defined Benefit Plan Disclosure [Line Items]
Unfunded capital commitments	0	0
Other Investments | Fair Value, Inputs, Level 1 | Retirement Pension Benefits
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		0
Other Investments | Fair Value, Inputs, Level 2 | Retirement Pension Benefits
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		0
Other Investments | Fair Value, Inputs, Level 3 | Retirement Pension Benefits
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		0
Other Investments | Fair Value, Inputs, Level 1, Level 2, and Level 3 | Retirement Pension Benefits
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		0
Other Investments | Fair Value Measured at Net Asset Value Per Share | Retirement Pension Benefits
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	$ 29,000,000	$ 31,000,000

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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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The amount of unfunded commitments for which the entity is obligated, to those certain investments for which net asset value per share is calculated (including by unit, membership interest, or other equity (ownership interest) unit measure) (alternative investments).

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