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Business Combinations, Goodwill and Acquired Intangible - Acquired Intangible Assets (Parenthetical) (Detail) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Acquired Finite Lived Intangible Assets [Line Items]      
Impairment of intagible asset $ 10 $ 19 $ 30
Amortization of acquired intangible assets 10 14 $ 19
2024 9    
2025 6    
2026 5    
2027 3    
After 2027 $ 1    
Series of Individually Immaterial Business Acquisitions [Member] | Business Processing [Member] | Customer, Services and Lending Relationships [Member]      
Acquired Finite Lived Intangible Assets [Line Items]      
Impairment of intagible asset   $ 6