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Employee Benefit Plans - Plan's Assets Carried at Fair Value (Detail) - USD ($)
$ in Millions
Dec. 31, 2022
Dec. 31, 2021
Defined Benefit Plan Disclosure [Line Items]    
Total fair value measurements $ 6 $ 9
Annuity Contract [Member]    
Defined Benefit Plan Disclosure [Line Items]    
Total fair value measurements 3 5
Other [Member]    
Defined Benefit Plan Disclosure [Line Items]    
Total fair value measurements 3 4
Level 1 [Member]    
Defined Benefit Plan Disclosure [Line Items]    
Total fair value measurements 0 1
Level 1 [Member] | Annuity Contract [Member]    
Defined Benefit Plan Disclosure [Line Items]    
Total fair value measurements 0  
Level 1 [Member] | Other [Member]    
Defined Benefit Plan Disclosure [Line Items]    
Total fair value measurements 0 1
Level 2 [Member]    
Defined Benefit Plan Disclosure [Line Items]    
Total fair value measurements 3 3
Level 2 [Member] | Annuity Contract [Member]    
Defined Benefit Plan Disclosure [Line Items]    
Total fair value measurements 0  
Level 2 [Member] | Other [Member]    
Defined Benefit Plan Disclosure [Line Items]    
Total fair value measurements 3 3
Level 3 [Member]    
Defined Benefit Plan Disclosure [Line Items]    
Total fair value measurements 3 5
Level 3 [Member] | Annuity Contract [Member]    
Defined Benefit Plan Disclosure [Line Items]    
Total fair value measurements 3 $ 5
Level 3 [Member] | Other [Member]    
Defined Benefit Plan Disclosure [Line Items]    
Total fair value measurements $ 0