Annual report pursuant to Section 13 and 15(d)

FAIR VALUE MEASUREMENTS - Levels Within the Fair Value Hierarchy for Pension Plan Assets (Details)

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FAIR VALUE MEASUREMENTS - Levels Within the Fair Value Hierarchy for Pension Plan Assets (Details) - Pension Plans, Defined Benefit - USD ($)
$ in Millions
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Defined Benefit Plan, Plan Assets $ 7,260 $ 7,158 $ 8,905
Cash and cash equivalents      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Defined Benefit Plan, Plan Assets 375 635  
Equity Securities, US based companies      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Defined Benefit Plan, Plan Assets 1,178 1,188  
Equity Securities, International based companies      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Defined Benefit Plan, Plan Assets 921 939  
Government bonds      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Defined Benefit Plan, Plan Assets 1,386 1,238  
Corporate bonds and debt securities      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Defined Benefit Plan, Plan Assets 579 499  
Mutual, pooled and commingled funds      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Defined Benefit Plan, Plan Assets 778 767  
Hedge funds/limited partnerships      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Defined Benefit Plan, Plan Assets 1,057 936  
Real estate      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Defined Benefit Plan, Plan Assets 376 424  
Derivative financial instruments      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Defined Benefit Plan, Plan Assets 33 (14)  
Other      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Defined Benefit Plan, Plan Assets 577 546  
Level 1      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Defined Benefit Plan, Plan Assets 2,334 2,349  
Level 1 | Cash and cash equivalents      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Defined Benefit Plan, Plan Assets 163 146  
Level 1 | Equity Securities, US based companies      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Defined Benefit Plan, Plan Assets 1,148 1,157  
Level 1 | Equity Securities, International based companies      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Defined Benefit Plan, Plan Assets 904 920  
Level 1 | Government bonds      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Defined Benefit Plan, Plan Assets 107 91  
Level 1 | Corporate bonds and debt securities      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Defined Benefit Plan, Plan Assets 0 0  
Level 1 | Mutual, pooled and commingled funds      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Defined Benefit Plan, Plan Assets 12 35  
Level 1 | Hedge funds/limited partnerships      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Defined Benefit Plan, Plan Assets 0 0  
Level 1 | Real estate      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Defined Benefit Plan, Plan Assets 0 0  
Level 1 | Derivative financial instruments      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Defined Benefit Plan, Plan Assets 0 0  
Level 1 | Other      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Defined Benefit Plan, Plan Assets 0 0  
Level 2      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Defined Benefit Plan, Plan Assets 2,348 2,316  
Level 2 | Cash and cash equivalents      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Defined Benefit Plan, Plan Assets 212 489  
Level 2 | Equity Securities, US based companies      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Defined Benefit Plan, Plan Assets 0 7  
Level 2 | Equity Securities, International based companies      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Defined Benefit Plan, Plan Assets 15 16  
Level 2 | Government bonds      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Defined Benefit Plan, Plan Assets 1,279 1,147  
Level 2 | Corporate bonds and debt securities      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Defined Benefit Plan, Plan Assets 552 469  
Level 2 | Mutual, pooled and commingled funds      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Defined Benefit Plan, Plan Assets 257 202  
Level 2 | Hedge funds/limited partnerships      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Defined Benefit Plan, Plan Assets 0 0  
Level 2 | Real estate      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Defined Benefit Plan, Plan Assets 0 0  
Level 2 | Derivative financial instruments      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Defined Benefit Plan, Plan Assets 33 (14)  
Level 2 | Other      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Defined Benefit Plan, Plan Assets 0 0  
Level 3      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Defined Benefit Plan, Plan Assets 382 357 $ 339
Level 3 | Cash and cash equivalents      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Defined Benefit Plan, Plan Assets 0 0  
Level 3 | Equity Securities, US based companies      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Defined Benefit Plan, Plan Assets 30 24  
Level 3 | Equity Securities, International based companies      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Defined Benefit Plan, Plan Assets 2 3  
Level 3 | Government bonds      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Defined Benefit Plan, Plan Assets 0 0  
Level 3 | Corporate bonds and debt securities      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Defined Benefit Plan, Plan Assets 27 30  
Level 3 | Mutual, pooled and commingled funds      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Defined Benefit Plan, Plan Assets 0 0  
Level 3 | Hedge funds/limited partnerships      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Defined Benefit Plan, Plan Assets 0 0  
Level 3 | Real estate      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Defined Benefit Plan, Plan Assets 0 0  
Level 3 | Derivative financial instruments      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Defined Benefit Plan, Plan Assets 0 0  
Level 3 | Other      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Defined Benefit Plan, Plan Assets 323 300  
Other      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Defined Benefit Plan, Plan Assets 2,196 2,136  
Other | Cash and cash equivalents      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Defined Benefit Plan, Plan Assets 0 0  
Other | Equity Securities, US based companies      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Defined Benefit Plan, Plan Assets 0 0  
Other | Equity Securities, International based companies      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Defined Benefit Plan, Plan Assets 0 0  
Other | Government bonds      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Defined Benefit Plan, Plan Assets 0 0  
Other | Corporate bonds and debt securities      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Defined Benefit Plan, Plan Assets 0 0  
Other | Mutual, pooled and commingled funds      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Defined Benefit Plan, Plan Assets 509 530  
Other | Hedge funds/limited partnerships      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Defined Benefit Plan, Plan Assets 1,057 936  
Other | Real estate      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Defined Benefit Plan, Plan Assets 376 424  
Other | Derivative financial instruments      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Defined Benefit Plan, Plan Assets 0 0  
Other | Other      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Defined Benefit Plan, Plan Assets $ 254 $ 246