RETIREMENT BENEFITS PLANS - Fair Value of Pension Plan Assets (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Defined Benefit Plan Disclosure [Line Items]
United States pension plans percentage of worldwide pension assets	62.00%
United Kingdom pension plans percentage of worldwide pension assets	29.00%
United States pension plans' target allocation of United States equities	19.00%
United States pension plans' target allocation of non-United States equities	19.00%
United States pension plans' target allocation of real estate	6.00%
United State pension plans' target allocation of debt securities	47.00%
United States pension plans' target allocation of other, including private equity, private debt, and cash equivalents	9.00%
United Kingdom pension plans' target allocation of equities	44.00%
Unfunded commitments	$ 192	$ 254
Total pension plan assets	5,919	5,600
Pending purchases and sales of plan assets, and interest receivable	(99)	(108)
Quoted prices in active markets for identical assets (Level 1)
Defined Benefit Plan Disclosure [Line Items]
Total pension plan assets	806	696
Other observable inputs (Level 2)
Defined Benefit Plan Disclosure [Line Items]
Total pension plan assets	2,827	2,661
Unobservable inputs (Level 3)
Defined Benefit Plan Disclosure [Line Items]
Total pension plan assets	535	358
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	586	610
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	586	610
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	240	73
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	240	73
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	624	681
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	624	681
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	1,074	1,021
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	1,074	1,021
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	417	316
United States treasuries | Quoted prices in active markets for identical assets (Level 1)
Defined Benefit Plan Disclosure [Line Items]
Total pension plan assets	417	316
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
Bank loans | Fair Value, Inputs, Level 1, 2 and 3
Defined Benefit Plan Disclosure [Line Items]
Total pension plan assets	117	110
Bank loans | Quoted prices in active markets for identical assets (Level 1)
Defined Benefit Plan Disclosure [Line Items]
Total pension plan assets	0	0
Bank loans | Other observable inputs (Level 2)
Defined Benefit Plan Disclosure [Line Items]
Total pension plan assets	117	110
Bank loans | 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	471	419
Real estate | Quoted prices in active markets for identical assets (Level 1)
Defined Benefit Plan Disclosure [Line Items]
Total pension plan assets	237	221
Real estate | Other observable inputs (Level 2)
Defined Benefit Plan Disclosure [Line Items]
Total pension plan assets	18	14
Real estate | Unobservable inputs (Level 3)
Defined Benefit Plan Disclosure [Line Items]
Total pension plan assets	216	184
Equity securities | Fair Value, Inputs, Level 1, 2 and 3
Defined Benefit Plan Disclosure [Line Items]
Total pension plan assets	2
Equity securities | Quoted prices in active markets for identical assets (Level 1)
Defined Benefit Plan Disclosure [Line Items]
Total pension plan assets	2
Equity securities | Other observable inputs (Level 2)
Defined Benefit Plan Disclosure [Line Items]
Total pension plan assets	0
Equity securities | Unobservable inputs (Level 3)
Defined Benefit Plan Disclosure [Line Items]
Total pension plan assets	0
Cash equivalents | Fair Value, Inputs, Level 1, 2 and 3
Defined Benefit Plan Disclosure [Line Items]
Total pension plan assets	150	184
Cash equivalents | Quoted prices in active markets for identical assets (Level 1)
Defined Benefit Plan Disclosure [Line Items]
Total pension plan assets	28	71
Cash equivalents | Other observable inputs (Level 2)
Defined Benefit Plan Disclosure [Line Items]
Total pension plan assets	122	113
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	122	88
Exchange traded funds | Quoted prices in active markets for identical assets (Level 1)
Defined Benefit Plan Disclosure [Line Items]
Total pension plan assets	122	88
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	365	213
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	46	39
Other | Unobservable inputs (Level 3)
Defined Benefit Plan Disclosure [Line Items]
Total pension plan assets	319	174
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	1,841	1,987
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	$ 9	$ 6