v3.24.0.1
Fair Value Disclosures - Changes in Level 3 Assets and Liabilities Measured at Fair Value on Recurring Basis (Detail) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Line Items    
Assets measured at fair value, beginning balance $ 300  
Realized and Unrealized Gains (Losses),Assets 20  
Purchases, Assets 197  
Sales and Maturities, Assets 76  
Issuances and Other Settlements, Assets 122  
Transfers into Level 3, Assets 38  
Transfers out of Level 3, Assets (20)  
Assets measured at fair value, ending balance 337 $ 300
Total Net Unrealized Gains (Losses) Included in Earnings 6  
Other Liabilities Member    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Line Items    
Liabilities measured at fair value, beginning balance 280 342
Realized and Unrealized Gains (Losses), Liabilities 1 (3)
Purchases, Liabilities 0 0
Sales and Maturities, Liabilities 0 0
Issuances and Other Settlements, Liabilities 0 (59)
Transfers into Level 3, Liabilities 0 0
Transfers out of Level 3, Liabilities 0 0
Liabilities measured at fair value, ending balance 279 280
Total Net Unrealized Gains (Losses) Included in Earnings $ 1 $ (3)
Fair Value, Liability, Recurring Basis, Still Held, Unrealized Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration] Nonoperating Income (Expense) Nonoperating Income (Expense)
Other Assets Member    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Line Items    
Assets measured at fair value, beginning balance $ 0  
Realized and Unrealized Gains (Losses),Assets 7  
Purchases, Assets 113  
Sales and Maturities, Assets 0  
Issuances and Other Settlements, Assets 0  
Transfers into Level 3, Assets 0  
Transfers out of Level 3, Assets 0  
Assets measured at fair value, ending balance 120 $ 0
Total Net Unrealized Gains (Losses) Included in Earnings 7  
Investments Member    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Line Items    
Assets measured at fair value, beginning balance 300 292
Realized and Unrealized Gains (Losses),Assets 13 (13)
Purchases, Assets 84 95
Sales and Maturities, Assets (76) (79)
Issuances and Other Settlements, Assets 122 0
Transfers into Level 3, Assets 38 35
Transfers out of Level 3, Assets (20) (30)
Assets measured at fair value, ending balance 217 300
Total Net Unrealized Gains (Losses) Included in Earnings 1 (11)
Debt securities Member    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Line Items    
Assets measured at fair value, beginning balance 52 17
Realized and Unrealized Gains (Losses),Assets 0 (5)
Purchases, Assets 8 36
Sales and Maturities, Assets   18
Issuances and Other Settlements, Assets 0 0
Transfers into Level 3, Assets 0 26
Transfers out of Level 3, Assets 0 4
Assets measured at fair value, ending balance 42 52
Total Net Unrealized Gains (Losses) Included in Earnings 0 (5)
Debt securities Member | Trading Member    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Line Items    
Assets measured at fair value, beginning balance 52 17
Realized and Unrealized Gains (Losses),Assets $ 0 (5)
Fair Value, Asset, Recurring Basis, Unobservable Input Reconciliation, Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration] Nonoperating Income (Expense)  
Purchases, Assets $ 8 36
Sales and Maturities, Assets 18 18
Issuances and Other Settlements, Assets 0 0
Transfers into Level 3, Assets 0 26
Transfers out of Level 3, Assets 0 4
Assets measured at fair value, ending balance 42 52
Total Net Unrealized Gains (Losses) Included in Earnings 0 $ (5)
Fair Value, Asset, Recurring Basis, Still Held, Unrealized Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration]   Nonoperating Income (Expense)
Consolidated Variable Interest Entities Member | Loans Member    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Line Items    
Assets measured at fair value, beginning balance 248 $ 270
Realized and Unrealized Gains (Losses),Assets 13 (6)
Purchases, Assets 76 59
Sales and Maturities, Assets 58 61
Issuances and Other Settlements, Assets 122 0
Transfers into Level 3, Assets 38 9
Transfers out of Level 3, Assets 20 23
Assets measured at fair value, ending balance 175 248
Total Net Unrealized Gains (Losses) Included in Earnings 1 (6)
Consolidated Variable Interest Entities Member | Private equity funds member    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Line Items    
Assets measured at fair value, beginning balance $ 0 5
Realized and Unrealized Gains (Losses),Assets   (2)
Purchases, Assets   0
Sales and Maturities, Assets   0
Issuances and Other Settlements, Assets   0
Transfers into Level 3, Assets   0
Transfers out of Level 3, Assets   3
Assets measured at fair value, ending balance   0
Total Net Unrealized Gains (Losses) Included in Earnings   $ 0