RETIREMENT BENEFITS PLANS - Fair Value of Pension Plan Assets (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Defined Benefit Plan Disclosure [Line Items]
United States pension plans percentage of worldwide pension assets	61.00%
United Kingdom pension plans percentage of worldwide pension assets	26.00%
United States pension plans' target allocation of United States equities	15.00%
United States pension plans' target allocation of non-United States equities	7.00%
United States pension plans' target allocation of real estate	3.00%
United State pension plans' target allocation of debt securities	64.00%
United States pension plans' target allocation of other, including private equity, private debt, and cash equivalents	11.00%
United Kingdom pension plans' target allocation of equities	31.00%
Total pension plan assets	$ 4,237	$ 4,121
Pending purchases and sales of plan assets, and interest receivable	(67)	(69)
Unfunded commitments	154	180
Quoted prices in active markets for identical assets (Level 1)
Defined Benefit Plan Disclosure [Line Items]
Total pension plan assets	729	834
Other observable inputs (Level 2)
Defined Benefit Plan Disclosure [Line Items]
Total pension plan assets	2,036	1,694
Unobservable inputs (Level 3)
Defined Benefit Plan Disclosure [Line Items]
Total pension plan assets	569	559
Non-United States equity and global equities | Fair Value, Inputs, Level 1, 2 and 3
Defined Benefit Plan Disclosure [Line Items]
Total pension plan assets	154	173
Non-United States equity and global equities | Quoted prices in active markets for identical assets (Level 1)
Defined Benefit Plan Disclosure [Line Items]
Total pension plan assets	0	0
Non-United States equity and global equities | Other observable inputs (Level 2)
Defined Benefit Plan Disclosure [Line Items]
Total pension plan assets	154	173
Non-United States equity and global equities | Unobservable inputs (Level 3)
Defined Benefit Plan Disclosure [Line Items]
Total pension plan assets	0	0
United States equity | Fair Value, Inputs, Level 1, 2 and 3
Defined Benefit Plan Disclosure [Line Items]
Total pension plan assets	76	54
United States equity | Quoted prices in active markets for identical assets (Level 1)
Defined Benefit Plan Disclosure [Line Items]
Total pension plan assets	0	0
United States equity | Other observable inputs (Level 2)
Defined Benefit Plan Disclosure [Line Items]
Total pension plan assets	76	54
United States equity | Unobservable inputs (Level 3)
Defined Benefit Plan Disclosure [Line Items]
Total pension plan assets	0	0
Fixed income | Fair Value, Inputs, Level 1, 2 and 3
Defined Benefit Plan Disclosure [Line Items]
Total pension plan assets	115	620
Fixed income | Quoted prices in active markets for identical assets (Level 1)
Defined Benefit Plan Disclosure [Line Items]
Total pension plan assets	0	0
Fixed income | Other observable inputs (Level 2)
Defined Benefit Plan Disclosure [Line Items]
Total pension plan assets	115	620
Fixed income | Unobservable inputs (Level 3)
Defined Benefit Plan Disclosure [Line Items]
Total pension plan assets	0	0
Fixed income securities | Fair Value, Inputs, Level 1, 2 and 3
Defined Benefit Plan Disclosure [Line Items]
Total pension plan assets	1,607	744
Fixed income securities | Quoted prices in active markets for identical assets (Level 1)
Defined Benefit Plan Disclosure [Line Items]
Total pension plan assets	0	0
Fixed income securities | Other observable inputs (Level 2)
Defined Benefit Plan Disclosure [Line Items]
Total pension plan assets	1,607	744
Fixed income securities | Unobservable inputs (Level 3)
Defined Benefit Plan Disclosure [Line Items]
Total pension plan assets	0	0
United States treasuries | Fair Value, Inputs, Level 1, 2 and 3
Defined Benefit Plan Disclosure [Line Items]
Total pension plan assets	566	660
United States treasuries | Quoted prices in active markets for identical assets (Level 1)
Defined Benefit Plan Disclosure [Line Items]
Total pension plan assets	566	660
United States treasuries | Other observable inputs (Level 2)
Defined Benefit Plan Disclosure [Line Items]
Total pension plan assets	0	0
United States treasuries | Unobservable inputs (Level 3)
Defined Benefit Plan Disclosure [Line Items]
Total pension plan assets	0	0
Real estate | Fair Value, Inputs, Level 1, 2 and 3
Defined Benefit Plan Disclosure [Line Items]
Total pension plan assets	291	295
Real estate | Quoted prices in active markets for identical assets (Level 1)
Defined Benefit Plan Disclosure [Line Items]
Total pension plan assets	65	76
Real estate | Other observable inputs (Level 2)
Defined Benefit Plan Disclosure [Line Items]
Total pension plan assets	27	20
Real estate | Unobservable inputs (Level 3)
Defined Benefit Plan Disclosure [Line Items]
Total pension plan assets	199	199
Cash equivalents | Fair Value, Inputs, Level 1, 2 and 3
Defined Benefit Plan Disclosure [Line Items]
Total pension plan assets	36	77
Cash equivalents | Quoted prices in active markets for identical assets (Level 1)
Defined Benefit Plan Disclosure [Line Items]
Total pension plan assets	14	21
Cash equivalents | Other observable inputs (Level 2)
Defined Benefit Plan Disclosure [Line Items]
Total pension plan assets	22	56
Cash equivalents | Unobservable inputs (Level 3)
Defined Benefit Plan Disclosure [Line Items]
Total pension plan assets	0	0
Exchange traded funds | Fair Value, Inputs, Level 1, 2 and 3
Defined Benefit Plan Disclosure [Line Items]
Total pension plan assets	84	77
Exchange traded funds | Quoted prices in active markets for identical assets (Level 1)
Defined Benefit Plan Disclosure [Line Items]
Total pension plan assets	84	77
Exchange traded funds | Other observable inputs (Level 2)
Defined Benefit Plan Disclosure [Line Items]
Total pension plan assets	0	0
Exchange traded funds | Unobservable inputs (Level 3)
Defined Benefit Plan Disclosure [Line Items]
Total pension plan assets	0	0
Other | Fair Value, Inputs, Level 1, 2 and 3
Defined Benefit Plan Disclosure [Line Items]
Total pension plan assets	405	387
Other | Quoted prices in active markets for identical assets (Level 1)
Defined Benefit Plan Disclosure [Line Items]
Total pension plan assets	0	0
Other | Other observable inputs (Level 2)
Defined Benefit Plan Disclosure [Line Items]
Total pension plan assets	35	27
Other | Unobservable inputs (Level 3)
Defined Benefit Plan Disclosure [Line Items]
Total pension plan assets	370	360
Common collective and other trusts measured at net asset value | Fair Value Measured at Net Asset Value Per Share
Defined Benefit Plan Disclosure [Line Items]
Total pension plan assets	968	1,100
Money market funds measured at net asset value | Fair Value Measured at Net Asset Value Per Share
Defined Benefit Plan Disclosure [Line Items]
Total pension plan assets	$ 2	$ 3