RETIREMENT BENEFITS PLANS - Employer Contributions to Retirement Benefits Plans (Details) - Pension plans - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Defined Benefit Plans and Other Postretirement Benefit Plans
Expected future contributions, defined benefit plans	$ 115
Employer contributions to pension plans	113	$ 116	$ 343
United States
Defined Benefit Plans and Other Postretirement Benefit Plans
Expected future contributions, defined benefit plans	19
Employer contributions to pension plans	16	30	237
Non-United States plans
Defined Benefit Plans and Other Postretirement Benefit Plans
Expected future contributions, defined benefit plans	96
Employer contributions to pension plans	$ 97	$ 85	$ 106