v3.25.2
Fair Value Measurement - Nonrecurring Basis (Details) - USD ($)
$ in Millions
 3 Months Ended 6 Months Ended
Jun. 30, 2025
Jun. 30, 2024
Jun. 30, 2025
Jun. 30, 2024
Dec. 31, 2024
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]          
Equity securities adjusted based on the measurement alternative $ 4,121 $ 3,564 $ 4,121 $ 3,564 $ 3,700
Nonrecurring          
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]          
Total assets measured at fair value on a nonrecurring basis 2,093 2,145 2,093 2,145  
Total liabilities measured at fair value on a recurring basis 5 0 5 0  
Total nonrecurring fair value gains/(losses) (123) (283) (130) (364)  
Nonrecurring | Accounts payable and other liabilities          
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]          
Total liabilities measured at fair value on a recurring basis 5 0 5 0  
Total nonrecurring fair value gains/(losses) (4) 0 (5) 0  
Nonrecurring | Loans          
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]          
Total assets measured at fair value on a nonrecurring basis 1,685 1,638 1,685 1,638  
Total nonrecurring fair value gains/(losses) (105) (105) (139) (149)  
Nonrecurring | Other assets          
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]          
Total assets measured at fair value on a nonrecurring basis 408 507 408 507  
Total nonrecurring fair value gains/(losses) (14) (178) 14 (215)  
Nonrecurring | Other assets using measurement alternative          
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]          
Total nonrecurring fair value gains/(losses) (7) (109) 26 (147)  
Nonrecurring | Level 1          
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]          
Total assets measured at fair value on a nonrecurring basis 0 0 0 0  
Total liabilities measured at fair value on a recurring basis 0 0 0 0  
Nonrecurring | Level 1 | Accounts payable and other liabilities          
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]          
Total liabilities measured at fair value on a recurring basis 0 0 0 0  
Nonrecurring | Level 1 | Loans          
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]          
Total assets measured at fair value on a nonrecurring basis 0 0 0 0  
Nonrecurring | Level 1 | Other assets          
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]          
Total assets measured at fair value on a nonrecurring basis 0 0 0 0  
Nonrecurring | Level 2          
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]          
Total assets measured at fair value on a nonrecurring basis 1,058 866 1,058 866  
Total liabilities measured at fair value on a recurring basis 0 0 0 0  
Nonrecurring | Level 2 | Accounts payable and other liabilities          
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]          
Total liabilities measured at fair value on a recurring basis 0 0 0 0  
Nonrecurring | Level 2 | Loans          
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]          
Total assets measured at fair value on a nonrecurring basis 1,048 860 1,048 860  
Nonrecurring | Level 2 | Other assets          
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]          
Total assets measured at fair value on a nonrecurring basis 10 6 10 6  
Nonrecurring | Level 3          
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]          
Total assets measured at fair value on a nonrecurring basis 1,035 1,279 1,035 1,279  
Total liabilities measured at fair value on a recurring basis 5 0 5 0  
Nonrecurring | Level 3 | Accounts payable and other liabilities          
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]          
Total liabilities measured at fair value on a recurring basis 5 0 5 0  
Nonrecurring | Level 3 | Loans          
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]          
Total assets measured at fair value on a nonrecurring basis 637 778 637 778  
Nonrecurring | Level 3 | Other assets          
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]          
Total assets measured at fair value on a nonrecurring basis 398 $ 501 398 $ 501  
Equity securities adjusted based on the measurement alternative $ 347   $ 347