RETIREMENT BENEFITS PLANS - Obligations and Funded Status (Details) - USD ($) $ in Millions	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Funded status
Fair value of plan assets	$ 4,237	$ 4,121
Pension plans | United States
Funded status
Fair value of plan assets	2,604	2,635	$ 3,672
Benefit obligations	(2,824)	(2,807)	(3,760)
Funded status	(220)	(172)
Amounts recognized in the Consolidated Balance Sheets
Other assets	0	0
Other current liabilities	(18)	(19)
Pension liabilities and Other postretirement benefits liabilities	(202)	(153)
Total	(220)	(172)
Amounts recognized in Accumulated other comprehensive loss (pre-tax)
Net actuarial loss (gain)	867	807
Prior service cost (credit)	4	5
Total	871	811	713
Pension plans | Non-United States plans
Funded status
Fair value of plan assets	1,633	1,486	2,247
Benefit obligations	(2,022)	(1,813)	(2,837)
Funded status	(389)	(327)
Amounts recognized in the Consolidated Balance Sheets
Other assets	210	199
Other current liabilities	(33)	(30)
Pension liabilities and Other postretirement benefits liabilities	(566)	(496)
Total	(389)	(327)
Amounts recognized in Accumulated other comprehensive loss (pre-tax)
Net actuarial loss (gain)	649	491
Prior service cost (credit)	12	14
Total	661	505	763
Other postretirement benefits plans
Funded status
Fair value of plan assets	17	16	19
Benefit obligations	(212)	(209)	(304)
Funded status	(195)	(194)
Amounts recognized in the Consolidated Balance Sheets
Other assets	0	0
Other current liabilities	(15)	(17)
Pension liabilities and Other postretirement benefits liabilities	(180)	(177)
Total	(195)	(194)
Amounts recognized in Accumulated other comprehensive loss (pre-tax)
Net actuarial loss (gain)	(92)	(119)
Prior service cost (credit)	(1)	(2)
Total	$ (93)	$ (120)	$ (55)