v3.26.3
Fair Value Measurements - Equity Securities without Readily Determinable Fair Value (Details) - USD ($)
$ in Millions
3 Months Ended 9 Months Ended
Sep. 30, 2026
Sep. 30, 2025
Sep. 30, 2026
Sep. 30, 2025
Dec. 31, 2025
Fair Value Disclosures [Abstract]          
Carry Value $ 272 [1] $ 268 [1] $ 272 [1] $ 268 [1] $ 269
Equity Securities without Readily Determinable Fair Value, Upward Price Adjustment, Annual Amount [2] 0 0 0 0  
Equity Securities without Readily Determinable Fair Value, Downward Price Adjustment, Annual Amount [2] (3) $ (8) (3) $ (8)  
Equity Securities without Readily Determinable Fair Value, Upward Price Adjustment, Cumulative Amount 201   201    
Equity Securities without Readily Determinable Fair Value, Downward Price Adjustment, Cumulative Amount $ (12)   $ (12)    
[1] Carrying value reflects cumulative purchases and sales in addition to upward and downward carrying value changes, and at December 31, 2025 was $269 million.
[2] Between January 1, 2018 and September 30, 2026, cumulative upward and downward carrying value adjustments for equity securities held at September 30, 2026 were $201 million and $(12) million, respectively.