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Senior Debt - Debt Maturities Relating to Senior Borrowings Outstanding (Detail) - USD ($)
Dec. 31, 2022
Dec. 31, 2021
Debt Instrument [Line Items]    
Total $ 1,700,000,000 $ 1,700,000,000
Senior Borrowings Outstanding [Member]    
Debt Instrument [Line Items]    
2023 - 2024 0  
2025 400,000,000  
2026 0  
2027 300,000,000  
Thereafter 1,000,000,000  
Total $ 1,700,000,000