v3.26.1
Fair Value Measurements - Schedule of Available-for-sale debt investments (Detail) - Available-for-sale Debt Investments
¥ in Millions, $ in Millions
12 Months Ended
Dec. 31, 2025
CNY (¥)
Dec. 31, 2025
USD ($)
Dec. 31, 2024
CNY (¥)
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]      
Begining Balance ¥ 5,510   ¥ 3,259
Disposals (1,051)   (85)
Conversion (1,610)   2,061
Net unrealized fair value change recognized in other comprehensive income (loss)     174
Additions 107    
Net unrealized fair value change (114)    
Accrued interest 70   74
Foreign currency translation adjustments (27)   27
Ending balance ¥ 2,885 $ 413 ¥ 5,510