v3.22.0.1
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, 2021
Dec. 31, 2020
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]    
Assets measured at fair value, beginning balance $ 252 $ 194
Realized and Unrealized Gains (Losses),Assets 3  
Purchases, Assets 89 86
Sales and Maturities, Assets (27) (42)
Transfers into Level 3, Assets 15 20
Transfers out of Level 3, Assets (40) (6)
Assets measured at fair value, ending balance 292 252
Total Net Unrealized Gains (Losses) Included in Earnings 3  
Liabilities measured at fair value, beginning balance 272 388
Realized and Unrealized Gains (Losses), Liabilities (34) (23)
Issuances and Other Settlements, Liabilities 36 (139)
Liabilities measured at fair value, ending balance 342 272
Total Net Unrealized Gains (Losses) Included in Earnings (34) (5)
Other Liabilities [Member]    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]    
Liabilities measured at fair value, beginning balance 272 388
Realized and Unrealized Gains (Losses), Liabilities (34) (23)
Issuances and Other Settlements, Liabilities 36 (139)
Liabilities measured at fair value, ending balance 342 272
Total Net Unrealized Gains (Losses) Included in Earnings (34) (5)
Investments [Member]    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]    
Assets measured at fair value, beginning balance 252 194
Realized and Unrealized Gains (Losses),Assets 3  
Purchases, Assets 89 86
Sales and Maturities, Assets (27) (42)
Transfers into Level 3, Assets 15 20
Transfers out of Level 3, Assets (40) (6)
Assets measured at fair value, ending balance 292 252
Total Net Unrealized Gains (Losses) Included in Earnings 3  
Debt securities [Member]    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]    
Assets measured at fair value, beginning balance 11 8
Realized and Unrealized Gains (Losses),Assets 2  
Purchases, Assets 43 3
Sales and Maturities, Assets (22)  
Transfers out of Level 3, Assets (17)  
Assets measured at fair value, ending balance 17 11
Total Net Unrealized Gains (Losses) Included in Earnings 2  
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 11 8
Realized and Unrealized Gains (Losses),Assets 2  
Purchases, Assets 43 3
Sales and Maturities, Assets (22)  
Transfers out of Level 3, Assets (17)  
Assets measured at fair value, ending balance 17 11
Total Net Unrealized Gains (Losses) Included in Earnings 2  
Consolidated Variable Interest Entities [Member] | Bank Loans [Member]    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]    
Assets measured at fair value, beginning balance 232 177
Purchases, Assets 46 75
Sales and Maturities, Assets (5) (34)
Transfers into Level 3, Assets 15 20
Transfers out of Level 3, Assets (18) (6)
Assets measured at fair value, ending balance 270 232
Consolidated Variable Interest Entities [Member] | Private/ Public Equity [Member]    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]    
Assets measured at fair value, beginning balance 9 9
Realized and Unrealized Gains (Losses),Assets 1  
Purchases, Assets   8
Sales and Maturities, Assets   (8)
Transfers out of Level 3, Assets (5)  
Assets measured at fair value, ending balance 5 $ 9
Total Net Unrealized Gains (Losses) Included in Earnings $ 1