XML 77 R65.htm IDEA: XBRL DOCUMENT v3.25.3
Fair Value Hierarchy - Schedule of Level 3 Assets, and Ranges and Weighted Averages of Significant Unobservable Inputs (Detail)
$ in Millions
Sep. 30, 2025
USD ($)
yr
Jun. 30, 2025
USD ($)
Dec. 31, 2024
USD ($)
yr
Fair Value Measurement Inputs and Valuation Techniques [Line Items]      
Total financial assets at fair value | $ $ 965,610 $ 967,846 $ 907,669
Level 3      
Fair Value Measurement Inputs and Valuation Techniques [Line Items]      
Total financial assets at fair value | $ 21,781 $ 21,117 20,358
Level 3 | Loans and securities backed by real estate      
Fair Value Measurement Inputs and Valuation Techniques [Line Items]      
Total financial assets at fair value | $ $ 148   $ 95
Level 3 | Loans and securities backed by real estate | Minimum | Yield      
Fair Value Measurement Inputs and Valuation Techniques [Line Items]      
Measurement input 0.024   0.072
Level 3 | Loans and securities backed by real estate | Minimum | Recovery rate      
Fair Value Measurement Inputs and Valuation Techniques [Line Items]      
Measurement input 0.223   0.233
Level 3 | Loans and securities backed by real estate | Minimum | Duration (years)      
Fair Value Measurement Inputs and Valuation Techniques [Line Items]      
Measurement input 0.3   1.9
Level 3 | Loans and securities backed by real estate | Maximum | Yield      
Fair Value Measurement Inputs and Valuation Techniques [Line Items]      
Measurement input 0.453   0.243
Level 3 | Loans and securities backed by real estate | Maximum | Recovery rate      
Fair Value Measurement Inputs and Valuation Techniques [Line Items]      
Measurement input 0.625   0.692
Level 3 | Loans and securities backed by real estate | Maximum | Duration (years)      
Fair Value Measurement Inputs and Valuation Techniques [Line Items]      
Measurement input 9.2   12.1
Level 3 | Loans and securities backed by real estate | Weighted Average | Yield      
Fair Value Measurement Inputs and Valuation Techniques [Line Items]      
Measurement input 0.113   0.115
Level 3 | Loans and securities backed by real estate | Weighted Average | Recovery rate      
Fair Value Measurement Inputs and Valuation Techniques [Line Items]      
Measurement input 0.365   0.509
Level 3 | Loans and securities backed by real estate | Weighted Average | Duration (years)      
Fair Value Measurement Inputs and Valuation Techniques [Line Items]      
Measurement input 2.8   3.7
Level 3 | Corporate debt instruments      
Fair Value Measurement Inputs and Valuation Techniques [Line Items]      
Total financial assets at fair value | $ $ 647   $ 728
Level 3 | Corporate debt instruments | Minimum | Yield      
Fair Value Measurement Inputs and Valuation Techniques [Line Items]      
Measurement input 0.021   0.030
Level 3 | Corporate debt instruments | Minimum | Recovery rate      
Fair Value Measurement Inputs and Valuation Techniques [Line Items]      
Measurement input 0.041   0.068
Level 3 | Corporate debt instruments | Minimum | Duration (years)      
Fair Value Measurement Inputs and Valuation Techniques [Line Items]      
Measurement input 2.5   1.6
Level 3 | Corporate debt instruments | Maximum | Yield      
Fair Value Measurement Inputs and Valuation Techniques [Line Items]      
Measurement input 0.193   0.359
Level 3 | Corporate debt instruments | Maximum | Recovery rate      
Fair Value Measurement Inputs and Valuation Techniques [Line Items]      
Measurement input 0.700   0.690
Level 3 | Corporate debt instruments | Maximum | Duration (years)      
Fair Value Measurement Inputs and Valuation Techniques [Line Items]      
Measurement input 15.1   3.3
Level 3 | Corporate debt instruments | Weighted Average | Yield      
Fair Value Measurement Inputs and Valuation Techniques [Line Items]      
Measurement input 0.077   0.130
Level 3 | Corporate debt instruments | Weighted Average | Recovery rate      
Fair Value Measurement Inputs and Valuation Techniques [Line Items]      
Measurement input 0.459   0.536
Level 3 | Corporate debt instruments | Weighted Average | Duration (years)      
Fair Value Measurement Inputs and Valuation Techniques [Line Items]      
Measurement input 3.9   2.3
Level 3 | Other      
Fair Value Measurement Inputs and Valuation Techniques [Line Items]      
Total financial assets at fair value | $ $ 290   $ 390
Level 3 | Other | Minimum | Yield      
Fair Value Measurement Inputs and Valuation Techniques [Line Items]      
Measurement input 0.054   0.047
Level 3 | Other | Minimum | Duration (years)      
Fair Value Measurement Inputs and Valuation Techniques [Line Items]      
Measurement input 0.2   1.5
Level 3 | Other | Maximum | Yield      
Fair Value Measurement Inputs and Valuation Techniques [Line Items]      
Measurement input 0.426   0.379
Level 3 | Other | Maximum | Duration (years)      
Fair Value Measurement Inputs and Valuation Techniques [Line Items]      
Measurement input 7.6   3.5
Level 3 | Other | Weighted Average | Yield      
Fair Value Measurement Inputs and Valuation Techniques [Line Items]      
Measurement input 0.253   0.152
Level 3 | Other | Weighted Average | Duration (years)      
Fair Value Measurement Inputs and Valuation Techniques [Line Items]      
Measurement input 2.1   2.4