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PENSION AND OTHER POSTRETIREMENT BENEFIT PROGRAMS - Fair Value of Pension Plan Assets and Liabilities (Details) - USD ($)
$ in Millions
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Defined Benefit Plan Disclosure [Line Items]      
Fair value of pension plan assets $ 2,693 $ 2,501  
Quoted prices in active markets for identical assets (Level 1)      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of pension plan assets 569 501  
Significant other observable inputs (Level 2)      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of pension plan assets 1,148 1,116  
Significant unobservable inputs (Level 3)      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of pension plan assets 157 8  
Fair Value, Measured at NAV      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of pension plan assets 756 802  
Cash      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of pension plan assets 63 74  
Cash equivalents      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of pension plan assets 399 297  
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 399 297  
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 96 46  
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 96 46  
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 265 310  
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 265 310  
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 345 296  
Common stock | Quoted prices in active markets for identical assets (Level 1)      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of pension plan assets 345 296  
Common stock | Significant other observable inputs (Level 2)      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of pension plan assets 0 0  
Common stock | Significant unobservable inputs (Level 3)      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of pension plan assets 0 0  
Common stock | Fair Value, Measured at NAV      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of pension plan assets 0 0  
Mutual funds      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of pension plan assets 211 340  
Mutual funds | Quoted prices in active markets for identical assets (Level 1)      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of pension plan assets 211 184  
Mutual funds | Significant other observable inputs (Level 2)      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of pension plan assets 0 156  
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 834 790  
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 294 251  
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 540 539  
Partnership investments      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of pension plan assets 216 263  
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 216 263  
Other holdings      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of pension plan assets 264 85  
Other holdings | Quoted prices in active markets for identical assets (Level 1)      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of pension plan assets 13 21  
Other holdings | Significant other observable inputs (Level 2)      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of pension plan assets 94 56  
Other holdings | Significant unobservable inputs (Level 3)      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of pension plan assets 157 8 $ 9
Other holdings | Fair Value, Measured at NAV      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of pension plan assets $ 0 $ 0