RETIREMENT BENEFITS - Level 3 Roll Forward (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
U.S.
Defined Benefit Plan, Change in Fair Value of Plan Assets, Level 3 Reconciliation [Roll Forward]
Plan assets at fair value at beginning of year	$ 10,398
Plan assets at fair value at year end	10,441	$ 10,398
U.S. | Level 3
Defined Benefit Plan, Change in Fair Value of Plan Assets, Level 3 Reconciliation [Roll Forward]
Plan assets at fair value at beginning of year	7	29
Realized (losses)	0	(3)
Unrealized gains (losses)	0	2
Purchases, sales, and issuances	(2)	(21)
Transfers in and/or out of Level 3	0	0
Plan assets at fair value at year end	5	7
U.S. | Annuity contracts | Level 3
Defined Benefit Plan, Change in Fair Value of Plan Assets, Level 3 Reconciliation [Roll Forward]
Plan assets at fair value at beginning of year	3	4
Realized (losses)	0	0
Unrealized gains (losses)	0	0
Purchases, sales, and issuances	0	(1)
Transfers in and/or out of Level 3	0	0
Plan assets at fair value at year end	3	3
U.S. | Other investments | Level 3
Defined Benefit Plan, Change in Fair Value of Plan Assets, Level 3 Reconciliation [Roll Forward]
Plan assets at fair value at beginning of year	4	25
Realized (losses)	0	(3)
Unrealized gains (losses)	0	2
Purchases, sales, and issuances	(2)	(20)
Transfers in and/or out of Level 3	0	0
Plan assets at fair value at year end	2	4
Non-U.S.
Defined Benefit Plan, Change in Fair Value of Plan Assets, Level 3 Reconciliation [Roll Forward]
Plan assets at fair value at beginning of year	6,941
Plan assets at fair value at year end	7,396	6,941
Non-U.S. | Level 3
Defined Benefit Plan, Change in Fair Value of Plan Assets, Level 3 Reconciliation [Roll Forward]
Plan assets at fair value at beginning of year	262	322
Unrealized gains (losses)	6	0
Purchases, sales, and issuances	(33)	(60)
Transfers in and/or out of Level 3	0	0
Plan assets at fair value at year end	235	262
Non-U.S. | Real estate | Level 3
Defined Benefit Plan, Change in Fair Value of Plan Assets, Level 3 Reconciliation [Roll Forward]
Plan assets at fair value at beginning of year	2	2
Unrealized gains (losses)	0	0
Purchases, sales, and issuances	0	0
Transfers in and/or out of Level 3	0	0
Plan assets at fair value at year end	2	2
Non-U.S. | Annuity contracts | Level 3
Defined Benefit Plan, Change in Fair Value of Plan Assets, Level 3 Reconciliation [Roll Forward]
Plan assets at fair value at beginning of year	2	2
Unrealized gains (losses)	0	0
Purchases, sales, and issuances	0	0
Transfers in and/or out of Level 3	0	0
Plan assets at fair value at year end	2	2
Non-U.S. | Other investments | Level 3
Defined Benefit Plan, Change in Fair Value of Plan Assets, Level 3 Reconciliation [Roll Forward]
Plan assets at fair value at beginning of year	258	318
Unrealized gains (losses)	6	0
Purchases, sales, and issuances	(33)	(60)
Transfers in and/or out of Level 3	0	0
Plan assets at fair value at year end	$ 231	$ 258