PENSION AND OTHER POSTRETIREMENT BENEFIT PROGRAMS - Fair Value of Pension Plan Assets and Liabilities (Details) - USD ($) $ in Millions	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Defined Benefit Plan Disclosure [Line Items]
Fair value of pension plan assets	$ 2,388	$ 2,228
Quoted prices in active markets for identical assets (Level 1)
Defined Benefit Plan Disclosure [Line Items]
Fair value of pension plan assets	227	561
Significant other observable inputs (Level 2)
Defined Benefit Plan Disclosure [Line Items]
Fair value of pension plan assets	1,468	750
Significant unobservable inputs (Level 3)
Defined Benefit Plan Disclosure [Line Items]
Fair value of pension plan assets	132	127
Fair Value, Measured at NAV
Defined Benefit Plan Disclosure [Line Items]
Fair value of pension plan assets	501	738
Cash
Defined Benefit Plan Disclosure [Line Items]
Fair value of pension plan assets	60	52
Cash equivalents
Defined Benefit Plan Disclosure [Line Items]
Fair value of pension plan assets	181	179
Cash equivalents | Quoted prices in active markets for identical assets (Level 1)
Defined Benefit Plan Disclosure [Line Items]
Fair value of pension plan assets	0	0
Cash equivalents | Significant other observable inputs (Level 2)
Defined Benefit Plan Disclosure [Line Items]
Fair value of pension plan assets	181	179
Cash equivalents | Significant unobservable inputs (Level 3)
Defined Benefit Plan Disclosure [Line Items]
Fair value of pension plan assets	0	0
Cash equivalents | Fair Value, Measured at NAV
Defined Benefit Plan Disclosure [Line Items]
Fair value of pension plan assets	0	0
U.S. government and government agency issues
Defined Benefit Plan Disclosure [Line Items]
Fair value of pension plan assets	245	135
U.S. government and government agency issues | Quoted prices in active markets for identical assets (Level 1)
Defined Benefit Plan Disclosure [Line Items]
Fair value of pension plan assets	0	0
U.S. government and government agency issues | Significant other observable inputs (Level 2)
Defined Benefit Plan Disclosure [Line Items]
Fair value of pension plan assets	245	135
U.S. government and government agency issues | Significant unobservable inputs (Level 3)
Defined Benefit Plan Disclosure [Line Items]
Fair value of pension plan assets	0	0
U.S. government and government agency issues | Fair Value, Measured at NAV
Defined Benefit Plan Disclosure [Line Items]
Fair value of pension plan assets	0	0
Corporate bonds
Defined Benefit Plan Disclosure [Line Items]
Fair value of pension plan assets	398	357
Corporate bonds | Quoted prices in active markets for identical assets (Level 1)
Defined Benefit Plan Disclosure [Line Items]
Fair value of pension plan assets	0	0
Corporate bonds | Significant other observable inputs (Level 2)
Defined Benefit Plan Disclosure [Line Items]
Fair value of pension plan assets	398	357
Corporate bonds | Significant unobservable inputs (Level 3)
Defined Benefit Plan Disclosure [Line Items]
Fair value of pension plan assets	0	0
Corporate bonds | Fair Value, Measured at NAV
Defined Benefit Plan Disclosure [Line Items]
Fair value of pension plan assets	0	0
Common stock
Defined Benefit Plan Disclosure [Line Items]
Fair value of pension plan assets		353
Common stock | Quoted prices in active markets for identical assets (Level 1)
Defined Benefit Plan Disclosure [Line Items]
Fair value of pension plan assets		353
Common stock | Significant other observable inputs (Level 2)
Defined Benefit Plan Disclosure [Line Items]
Fair value of pension plan assets		0
Common stock | Significant unobservable inputs (Level 3)
Defined Benefit Plan Disclosure [Line Items]
Fair value of pension plan assets		0
Common stock | Fair Value, Measured at NAV
Defined Benefit Plan Disclosure [Line Items]
Fair value of pension plan assets		0
Mutual funds
Defined Benefit Plan Disclosure [Line Items]
Fair value of pension plan assets	743	199
Mutual funds | Quoted prices in active markets for identical assets (Level 1)
Defined Benefit Plan Disclosure [Line Items]
Fair value of pension plan assets	222	199
Mutual funds | Significant other observable inputs (Level 2)
Defined Benefit Plan Disclosure [Line Items]
Fair value of pension plan assets	521	0
Mutual funds | Significant unobservable inputs (Level 3)
Defined Benefit Plan Disclosure [Line Items]
Fair value of pension plan assets	0	0
Mutual funds | Fair Value, Measured at NAV
Defined Benefit Plan Disclosure [Line Items]
Fair value of pension plan assets	0	0
Common/collective trust funds
Defined Benefit Plan Disclosure [Line Items]
Fair value of pension plan assets	335	540
Common/collective trust funds | Quoted prices in active markets for identical assets (Level 1)
Defined Benefit Plan Disclosure [Line Items]
Fair value of pension plan assets	0	0
Common/collective trust funds | Significant other observable inputs (Level 2)
Defined Benefit Plan Disclosure [Line Items]
Fair value of pension plan assets	38	0
Common/collective trust funds | Significant unobservable inputs (Level 3)
Defined Benefit Plan Disclosure [Line Items]
Fair value of pension plan assets	0	0
Common/collective trust funds | Fair Value, Measured at NAV
Defined Benefit Plan Disclosure [Line Items]
Fair value of pension plan assets	297	540
Partnership investments
Defined Benefit Plan Disclosure [Line Items]
Fair value of pension plan assets	204	198
Partnership investments | Quoted prices in active markets for identical assets (Level 1)
Defined Benefit Plan Disclosure [Line Items]
Fair value of pension plan assets	0	0
Partnership investments | Significant other observable inputs (Level 2)
Defined Benefit Plan Disclosure [Line Items]
Fair value of pension plan assets	0	0
Partnership investments | Significant unobservable inputs (Level 3)
Defined Benefit Plan Disclosure [Line Items]
Fair value of pension plan assets	0	0
Partnership investments | Fair Value, Measured at NAV
Defined Benefit Plan Disclosure [Line Items]
Fair value of pension plan assets	204	198
Other holdings
Defined Benefit Plan Disclosure [Line Items]
Fair value of pension plan assets	222	215
Other holdings | Quoted prices in active markets for identical assets (Level 1)
Defined Benefit Plan Disclosure [Line Items]
Fair value of pension plan assets	5	9
Other holdings | Significant other observable inputs (Level 2)
Defined Benefit Plan Disclosure [Line Items]
Fair value of pension plan assets	85	79
Other holdings | Significant unobservable inputs (Level 3)
Defined Benefit Plan Disclosure [Line Items]
Fair value of pension plan assets	132	127	$ 155
Other holdings | Fair Value, Measured at NAV
Defined Benefit Plan Disclosure [Line Items]
Fair value of pension plan assets	$ 0	$ 0