v3.26.1
Fair Value Hierarchy - Summary of Changes in Fair Value for Level 3 Investments (Detail) - USD ($)
$ in Millions
 3 Months Ended
Mar. 31, 2026
Mar. 31, 2025
Dec. 31, 2025
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]      
Investments in credit funds measured at NAV $ 161,762   $ 124,182
Fair Value of Investments 1,745   1,739
Level 3      
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]      
Net realized gains/(losses) (3) $ 14  
Investments      
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]      
Beginning balance 14,411 14,142  
Net realized gains/(losses) 79 86  
Net unrealized gains/(losses) (159) (71)  
Purchases 147 274  
Sales (118) (119)  
Settlements (473) (242)  
Transfers into level 3 794 723  
Transfers out of level 3 (332) (244)  
Ending balance 14,349 14,549  
Investments in credit funds measured at NAV 160,017   122,443
Investments | Level 1      
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]      
Investments in credit funds measured at NAV 134,584   98,462
Investments | Level 2      
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]      
Investments in credit funds measured at NAV 11,084   9,570
Investments | Level 3      
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]      
Net realized gains/(losses) (80) 15  
Investments in credit funds measured at NAV 14,349   14,411
Investments | Corporate debt instruments      
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]      
Beginning balance 4,279 4,510  
Net realized gains/(losses) 53 56  
Net unrealized gains/(losses) (51) (5)  
Purchases 48 108  
Sales (30) (33)  
Settlements (184) (139)  
Transfers into level 3 625 362  
Transfers out of level 3 (143) (163)  
Ending balance 4,597 4,696  
Investments in credit funds measured at NAV 6,560   7,039
Investments | Corporate debt instruments | Level 1      
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]      
Investments in credit funds measured at NAV 135   139
Investments | Corporate debt instruments | Level 2      
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]      
Investments in credit funds measured at NAV 1,828   2,621
Investments | Corporate debt instruments | Level 3      
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]      
Investments in credit funds measured at NAV 4,597   4,279
Investments | Securities backed by real estate      
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]      
Beginning balance 306 562  
Net realized gains/(losses) 2 0  
Net unrealized gains/(losses) (1) (8)  
Purchases 4 6  
Settlements (2) (3)  
Transfers out of level 3 0 (25)  
Ending balance 309 532  
Investments in credit funds measured at NAV 314   312
Investments | Securities backed by real estate | Level 1      
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]      
Investments in credit funds measured at NAV 0   0
Investments | Securities backed by real estate | Level 2      
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]      
Investments in credit funds measured at NAV 5   6
Investments | Securities backed by real estate | Level 3      
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]      
Investments in credit funds measured at NAV 309   306
Investments | Other debt obligations      
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]      
Beginning balance 345 328  
Net unrealized gains/(losses) 4 2  
Purchases 4 32  
Settlements (59) (6)  
Ending balance 294 356  
Investments in credit funds measured at NAV 298   354
Investments | Other debt obligations | Level 1      
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]      
Investments in credit funds measured at NAV 4   9
Investments | Other debt obligations | Level 2      
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]      
Investments in credit funds measured at NAV 0   0
Investments | Other debt obligations | Level 3      
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]      
Investments in credit funds measured at NAV 294   345
Investments | Equity securities      
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]      
Beginning balance 9,481 8,742  
Net realized gains/(losses) 24 30  
Net unrealized gains/(losses) (111) (60)  
Purchases 91 128  
Sales (88) (86)  
Settlements (228) (94)  
Transfers into level 3 169 361  
Transfers out of level 3 (189) (56)  
Ending balance 9,149 $ 8,965  
Investments in credit funds measured at NAV 13,702   13,157
Investments | Equity securities | Level 1      
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]      
Investments in credit funds measured at NAV 524   459
Investments | Equity securities | Level 2      
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]      
Investments in credit funds measured at NAV 4,029   3,217
Investments | Equity securities | Level 3      
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]      
Investments in credit funds measured at NAV 9,149   9,481
Investments | U.S.      
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]      
Investments in credit funds measured at NAV 126,486   92,049
Investments | U.S. | Level 1      
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]      
Investments in credit funds measured at NAV 123,315   90,582
Investments | U.S. | Level 2      
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]      
Investments in credit funds measured at NAV 3,171   1,467
Investments | U.S. | Level 3      
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]      
Investments in credit funds measured at NAV 0   0
Investments | Non-U.S. government obligations      
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]      
Investments in credit funds measured at NAV 10,532   7,199
Investments | Non-U.S. government obligations | Level 1      
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]      
Investments in credit funds measured at NAV 10,528   7,195
Investments | Non-U.S. government obligations | Level 2      
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]      
Investments in credit funds measured at NAV 4   4
Investments | Non-U.S. government obligations | Level 3      
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]      
Investments in credit funds measured at NAV 0   0
Investments | Money market instruments      
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]      
Investments in credit funds measured at NAV 2,125   2,333
Investments | Money market instruments | Level 1      
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]      
Investments in credit funds measured at NAV 78   78
Investments | Money market instruments | Level 2      
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]      
Investments in credit funds measured at NAV 2,047   2,255
Investments | Money market instruments | Level 3      
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]      
Investments in credit funds measured at NAV $ 0   $ 0