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Intangibles, Net - Identified Intangible Assets by Major Classification (Detail) - USD ($)
$ in Millions
Dec. 31, 2021
Dec. 31, 2020
Finite Lived Intangible Assets [Line Items]    
Gross Carrying Amount $ 10  
Accumulated Amortization (1)  
Net Book Value 9 $ 0
Customer Relationships [Member]    
Finite Lived Intangible Assets [Line Items]    
Gross Carrying Amount 9  
Accumulated Amortization (1)  
Net Book Value 8  
Other [Member]    
Finite Lived Intangible Assets [Line Items]    
Gross Carrying Amount 1  
Accumulated Amortization 0  
Net Book Value $ 1