v3.26.1
Fair Value of Financial Instruments (Changes In Level 3 Assets And Liabilities Measured At Fair Value On A Recurring Basis) (Detail) - Fair Value Inputs Level 3 [Member] - USD ($)
$ in Millions
 3 Months Ended
Mar. 31, 2026
Mar. 31, 2025
Accounts Notes And Loans Receivable [Line Items]    
Beginning balance, fair value assets $ 85 $ 96
Total gains/(losses) included in earnings, assets $ 1 $ 1
Fair Value, Asset, Recurring Basis, Unobservable Input Reconciliation, Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration] Other Income Other Income
Unrealized gains/(losses) included in OCI, assets $ 0 [1] $ 0 [2]
Purchases, assets 1 0
Issuances, assets 0 0
Settlements, assets 0 0
Sales, assets 0 0
Transfers into level 3, assets 0 0
Transfers out of level 3, assets 0 0
Ending balance, fair value assets 87 97
Change in unrealized gains/(losses) for the period included in earnings for assets still held, assets $ 1 $ 1
Fair Value, Asset, Recurring Basis, Still Held, Unrealized Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration] Other Income Other Income
Change in unrealized gains/(losses) for the period included in OCI for Assets still held, assets $ 0 [1] $ 0 [2]
Beginning balance, fair value liabilities 83 72
Total (gains)/losses included in earnings, liabilities $ (2) $ 4
Fair Value, Liability, Recurring Basis, Unobservable Input Reconciliation, Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration] Other Income Other Income
Unrealized (gains)/losses included in OCI, liabilities $ (1) [3] $ 0 [4]
Fair Value, Liability, Recurring Basis, Unobservable Input Reconciliation, Liability, Gain (Loss), Statement of Other Comprehensive Income or Comprehensive Income [Extensible Enumeration] Other Comprehensive Income (Loss), Financial Liability, Fair Value Option, Unrealized Gain (Loss) Arising During Period, before Tax Other Comprehensive Income (Loss), Financial Liability, Fair Value Option, Unrealized Gain (Loss) Arising During Period, before Tax
Purchases, liabilities $ 0 $ 0
Issuances, liabilities 0 0
Settlements, liabilities (1) (6)
Sales, liabilities 0 0
Transfers into Level 3, liabilities 0 0
Transfers out of Level 3, liabilities 0 0
Ending balance, fair value liabilities 79 70
Change in unrealized gains/(losses) for the period included in earnings for liabilities still held, liabilities (2) 2
Change in Unrealized Gains/ (Losses) for the Period Included in OCI for Liabilities still held (1) [3] 0 [4]
Loans receivable - residential [Member] | Variable Interest Entity Primary Beneficiary [Member]    
Accounts Notes And Loans Receivable [Line Items]    
Beginning balance, fair value assets 34 28
Total gains/(losses) included in earnings, assets 0 2
Unrealized gains/(losses) included in OCI, assets 0 [1] 0 [2]
Purchases, assets 0 0
Issuances, assets 0 0
Settlements, assets 0 0
Sales, assets 0 0
Transfers into level 3, assets 0 0
Transfers out of level 3, assets 0 0
Ending balance, fair value assets 34 30
Change in unrealized gains/(losses) for the period included in earnings for assets still held, assets 0 2
Change in unrealized gains/(losses) for the period included in OCI for Assets still held, assets 0 [1] 0 [2]
Corporate Obligations [Member]    
Accounts Notes And Loans Receivable [Line Items]    
Beginning balance, fair value assets 18 16
Total gains/(losses) included in earnings, assets 0 (1)
Unrealized gains/(losses) included in OCI, assets 0 [1] 0 [2]
Purchases, assets 1 0
Issuances, assets 0 0
Settlements, assets 0 0
Sales, assets 0 0
Transfers into level 3, assets 0 0
Transfers out of level 3, assets 0 0
Ending balance, fair value assets 19 [5] 15 [6]
Change in unrealized gains/(losses) for the period included in earnings for assets still held, assets 0 (1)
Change in unrealized gains/(losses) for the period included in OCI for Assets still held, assets 0 [1] 0 [2]
Equity investments [Member]    
Accounts Notes And Loans Receivable [Line Items]    
Beginning balance, fair value assets 33 52
Total gains/(losses) included in earnings, assets 1 0
Unrealized gains/(losses) included in OCI, assets 0 [1] 0 [2]
Purchases, assets 0 0
Issuances, assets 0 0
Settlements, assets 0 0
Sales, assets 0 0
Transfers into level 3, assets 0 0
Transfers out of level 3, assets 0 0
Ending balance, fair value assets 34 52
Change in unrealized gains/(losses) for the period included in earnings for assets still held, assets 1 0
Change in unrealized gains/(losses) for the period included in OCI for Assets still held, assets 0 [1] 0 [2]
Medium Term Notes [Member]    
Accounts Notes And Loans Receivable [Line Items]    
Beginning balance, fair value liabilities 46 35
Total (gains)/losses included in earnings, liabilities (2) 2
Unrealized (gains)/losses included in OCI, liabilities (1) [3] 0 [4]
Purchases, liabilities 0 0
Issuances, liabilities 0 0
Settlements, liabilities 0
Sales, liabilities 0 0
Transfers into Level 3, liabilities 0 0
Transfers out of Level 3, liabilities 0 0
Ending balance, fair value liabilities 43 37
Change in unrealized gains/(losses) for the period included in earnings for liabilities still held, liabilities (2) 2
Change in Unrealized Gains/ (Losses) for the Period Included in OCI for Liabilities still held (1) [3] 0 [4]
Variable Interest Entity Notes [Member] | Variable Interest Entity Primary Beneficiary [Member]    
Accounts Notes And Loans Receivable [Line Items]    
Beginning balance, fair value liabilities 25 31
Total (gains)/losses included in earnings, liabilities 0 2
Unrealized (gains)/losses included in OCI, liabilities 0 [3] 0 [4]
Purchases, liabilities 0 0
Issuances, liabilities 0 0
Settlements, liabilities (1) (6)
Sales, liabilities 0 0
Transfers into Level 3, liabilities 0 0
Transfers out of Level 3, liabilities 0 0
Ending balance, fair value liabilities 24 27
Change in unrealized gains/(losses) for the period included in earnings for liabilities still held, liabilities 0 0
Change in Unrealized Gains/ (Losses) for the Period Included in OCI for Liabilities still held 0 [3] 0 [4]
Currency Derivatives [Member] | Variable Interest Entity Primary Beneficiary [Member]    
Accounts Notes And Loans Receivable [Line Items]    
Beginning balance, fair value liabilities 12 6
Total (gains)/losses included in earnings, liabilities 0 0
Unrealized (gains)/losses included in OCI, liabilities 0 [3] 0 [4]
Purchases, liabilities 0 0
Issuances, liabilities 0 0
Settlements, liabilities 0 0
Sales, liabilities 0 0
Transfers into Level 3, liabilities 0 0
Transfers out of Level 3, liabilities 0 0
Ending balance, fair value liabilities 12 6
Change in unrealized gains/(losses) for the period included in earnings for liabilities still held, liabilities 0 0
Change in Unrealized Gains/ (Losses) for the Period Included in OCI for Liabilities still held $ 0 [3] $ 0 [4]
[1] Reported within the "Unrealized gains (losses) on available-for-sale securities" on the Company's consolidated statements of comprehensive income (loss).
[2] Reported within the "Unrealized gains (losses) on available-for-sale securities" on the Company's consolidated statements of comprehensive income (loss).
[3] Reported within the "Instrument-specific credit risk of liabilities measured at fair value" on the Company's consolidated statements of comprehensive income (loss).
[4] Reported within the "Instrument-specific credit risk of liabilities measured at fair value" on the Company's consolidated statements of comprehensive income (loss).
[5] Includes loans carried at fair value of $18 million.
[6] Includes loans carried at fair value of $14 million