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PENSION - Summary of Fair Value of Pension Plan Assets by Asset Category (Detail) - USD ($)
$ in Millions
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets $ 1,650 $ 1,617 $ 0
Level 3      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 1,383 0  
Subtotal      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 1,650 1,617  
Subtotal | Level 1      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 19 16  
Subtotal | Level 2      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 240 1,585  
Subtotal | Level 3      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 1,383 0  
Subtotal | Not Subject to Leveling      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 8 16  
Global equity funds      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 79 338  
Global equity funds | Level 1      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 0 0  
Global equity funds | Level 2      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 79 326  
Global equity funds | Level 3      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 0 0  
Global equity funds | Not Subject to Leveling      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets   12  
Insurance contracts      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 1,383    
Insurance contracts | Level 1      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 0    
Insurance contracts | Level 2      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 0    
Insurance contracts | Level 3      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 1,383    
Governments      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 93 762  
Governments | Level 1      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 0 0  
Governments | Level 2      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 93 762  
Governments | Level 3      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 0 0  
Corporate bonds      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 4 415  
Corporate bonds | Level 1      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 0 0  
Corporate bonds | Level 2      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 4 415  
Corporate bonds | Level 3      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 0 0  
Global fixed income at net asset value      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 63 50  
Global fixed income at net asset value | Level 1      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 0 0  
Global fixed income at net asset value | Level 2      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 63 50  
Global fixed income at net asset value | Level 3      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 0 0  
Real estate      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 1 11  
Real estate | Level 1      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 0 0  
Real estate | Level 2      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 1 11  
Real estate | Level 3      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 0 0  
Other      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 8 5  
Other | Level 1      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 0 0  
Other | Level 2      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 0 1  
Other | Level 3      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 0 0  
Other | Not Subject to Leveling      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 8 4  
Cash & cash equivalents      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 19 36  
Cash & cash equivalents | Level 1      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 19 16  
Cash & cash equivalents | Level 2      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 0 20  
Cash & cash equivalents | Level 3      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 0 0  
Other assets and liabilities      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets $ 0 $ 0