EMPLOYEE RETIREMENT PLANS - Qualified Defined-benefit Pension Plan Assets at Fair Value by Level within the Fair Value Hierarchy (Details) - Qualified - USD ($) $ in Millions	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Fair Value
Private equity funds	$ 78	$ 99	$ 863
Level 1
Fair Value
Private equity funds	29	46
Level 2
Fair Value
Private equity funds	37	47
Level 3
Fair Value
Private equity funds	12	6
United States | Common and Preferred Stocks:
Fair Value
Private equity funds	15	25
United States | Corporate Debt Securities:
Fair Value
Private equity funds	3	5
United States | Government and Other Debt Securities:
Fair Value
Private equity funds	2	4
United States | Real Estate:
Fair Value
Private equity funds	3	3
United States | Level 1 | Common and Preferred Stocks:
Fair Value
Private equity funds	15	25
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	3	5
United States | Level 2 | Government and Other Debt Securities:
Fair Value
Private equity funds	2	4
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	13
International | Corporate Debt Securities:
Fair Value
Private equity funds	3	2
International | Government and Other Debt Securities:
Fair Value
Private equity funds	22	36
International | Real Estate:
Fair Value
Private equity funds	14	8
International | Short-Term and Other Investments – International
Fair Value
Private equity funds	8	3
International | Level 1 | Common and Preferred Stocks:
Fair Value
Private equity funds	8	13
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 | Short-Term and Other Investments – International
Fair Value
Private equity funds	1	3
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	3	2
International | Level 2 | Government and Other Debt Securities:
Fair Value
Private equity funds	22	36
International | Level 2 | Real Estate:
Fair Value
Private equity funds	0	0
International | Level 2 | Short-Term and Other Investments – International
Fair Value
Private equity funds	7	0
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	6
International | Level 3 | Short-Term and Other Investments – International
Fair Value
Private equity funds	$ 0	$ 0