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EMPLOYEE RETIREMENT PLANS - Qualified Defined-benefit Pension Plan Assets at Fair Value by Level within the Fair Value Hierarchy (Details) - USD ($) $ in Millions	Dec. 31, 2023	Dec. 31, 2022
Fair Value
Private equity funds		$ 78
Short-term and other investments:
Fair Value
Private equity funds	$ 90
Level 1
Fair Value
Private equity funds		29
Level 1 | Short-term and other investments:
Fair Value
Private equity funds	32
Level 2
Fair Value
Private equity funds		37
Level 2 | Short-term and other investments:
Fair Value
Private equity funds	46
Level 3
Fair Value
Private equity funds		12
Level 3 | Short-term and other investments:
Fair Value
Private equity funds	12
United States | Common and preferred stocks:
Fair Value
Private equity funds	17	15
United States | Corporate debt securities:
Fair Value
Private equity funds	4	3
United States | Government and other debt securities:
Fair Value
Private equity funds	1	2
United States | Real estate:
Fair Value
Private equity funds	3	3
United States | Level 1 | Common and preferred stocks:
Fair Value
Private equity funds	17	15
United States | Level 1 | Corporate debt securities:
Fair Value
Private equity funds	0	0
United States | Level 1 | Government and other debt securities:
Fair Value
Private equity funds	0	0
United States | Level 1 | Real estate:
Fair Value
Private equity funds	3	3
United States | Level 2 | Common and preferred stocks:
Fair Value
Private equity funds	0	0
United States | Level 2 | Corporate debt securities:
Fair Value
Private equity funds	4	3
United States | Level 2 | Government and other debt securities:
Fair Value
Private equity funds	1	2
United States | Level 2 | Real estate:
Fair Value
Private equity funds	0	0
United States | Level 3 | Common and preferred stocks:
Fair Value
Private equity funds	0	0
United States | Level 3 | Corporate debt securities:
Fair Value
Private equity funds	0	0
United States | Level 3 | Government and other debt securities:
Fair Value
Private equity funds	0	0
United States | Level 3 | Real estate:
Fair Value
Private equity funds	0	0
International | Common and preferred stocks:
Fair Value
Private equity funds	8	8
International | Corporate debt securities:
Fair Value
Private equity funds	14	3
International | Government and other debt securities:
Fair Value
Private equity funds	7	22
International | Real estate:
Fair Value
Private equity funds	14	14
International | Buy-in annuity:
Fair Value
Private equity funds	3
International | Short-term and other investments:
Fair Value
Private equity funds	19	8
International | Level 1 | Common and preferred stocks:
Fair Value
Private equity funds	8	8
International | Level 1 | Corporate debt securities:
Fair Value
Private equity funds	0	0
International | Level 1 | Government and other debt securities:
Fair Value
Private equity funds	0	0
International | Level 1 | Real estate:
Fair Value
Private equity funds	2	2
International | Level 1 | Buy-in annuity:
Fair Value
Private equity funds	0
International | Level 1 | Short-term and other investments:
Fair Value
Private equity funds	2	1
International | Level 2 | Common and preferred stocks:
Fair Value
Private equity funds	0	0
International | Level 2 | Corporate debt securities:
Fair Value
Private equity funds	14	3
International | Level 2 | Government and other debt securities:
Fair Value
Private equity funds	7	22
International | Level 2 | Real estate:
Fair Value
Private equity funds	0	0
International | Level 2 | Buy-in annuity:
Fair Value
Private equity funds	3
International | Level 2 | Short-term and other investments:
Fair Value
Private equity funds	17	7
International | Level 3 | Common and preferred stocks:
Fair Value
Private equity funds	0	0
International | Level 3 | Corporate debt securities:
Fair Value
Private equity funds	0	0
International | Level 3 | Government and other debt securities:
Fair Value
Private equity funds	0	0
International | Level 3 | Real estate:
Fair Value
Private equity funds	12	12
International | Level 3 | Buy-in annuity:
Fair Value
Private equity funds	0
International | Level 3 | Short-term and other investments:
Fair Value
Private equity funds	$ 0	$ 0

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

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Topic 715
-SubTopic 20
-Name Accounting Standards Codification
-Section 55
-Paragraph 17
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147480482/715-20-55-17

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
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-Publisher FASB
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Reference 3: http://www.xbrl.org/2003/role/disclosureRef
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Reference 4: http://www.xbrl.org/2003/role/disclosureRef
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Reference 5: http://www.xbrl.org/2003/role/disclosureRef
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-Name Accounting Standards Codification
-Section 50
-Paragraph 1
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Reference 6: http://www.xbrl.org/2003/role/exampleRef
-Topic 715
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Reference 7: http://www.xbrl.org/2003/role/exampleRef
-Topic 715
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-Section 50
-Paragraph 1
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