v3.25.2
Fair Value of Financial Instruments (Realized And Unrealized Gains And Losses Included In Earnings Pertaining To Level 3 Assets And Liabilities) (Detail) - USD ($)
$ in Millions
 3 Months Ended 6 Months Ended
Jun. 30, 2025
Jun. 30, 2024
Jun. 30, 2025
Jun. 30, 2024
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]        
Net gains (losses) on financial instruments at fair value and foreign exchange $ (2) $ (55) $ (17) $ (51)
Variable Interest Entity, Primary Beneficiary [Member]        
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]        
Net gains (losses) on financial instruments at fair value and foreign exchange 0 1 0 (24)
Fair Value Inputs Level 3 [Member] | Total Gains (Losses) Included in Earnings [Member]        
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]        
Net gains (losses) on financial instruments at fair value and foreign exchange (3) (56) (6) (60)
Total revenues $ (4) $ (68) $ (6) $ (96)
Fair Value, Asset (Liability), Recurring Basis, Unobservable Input Reconciliation, Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration] Realized Investment Gains (Losses) Realized Investment Gains (Losses) Realized Investment Gains (Losses) Realized Investment Gains (Losses)
Fair Value Inputs Level 3 [Member] | Change in Unrealized Gains (Losses) for the Period Included in Earnings for Assets and Liabilities still held [Member]        
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]        
Net gains (losses) on financial instruments at fair value and foreign exchange $ (3) $ (55) $ (6) $ (57)
Total revenues (4) (54) (6) (56)
Fair Value Inputs Level 3 [Member] | Variable Interest Entity, Primary Beneficiary [Member] | Total Gains (Losses) Included in Earnings [Member]        
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]        
Net gains (losses) on financial instruments at fair value and foreign exchange [1] (1) (12) 0 (36)
Fair Value Inputs Level 3 [Member] | Variable Interest Entity, Primary Beneficiary [Member] | Change in Unrealized Gains (Losses) for the Period Included in Earnings for Assets and Liabilities still held [Member]        
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]        
Net gains (losses) on financial instruments at fair value and foreign exchange [1] $ (1) $ 1 $ 0 $ 1
[1] Reported within "Net gains (losses) on financial instruments at fair value and foreign exchange-VIE" and "Other net realized gains (losses)-VIE" on the Company's consolidated statements of operations.