v3.26.1
Investments - Long-term Investments - Additional information (Detail)
¥ in Millions, shares in Millions, $ in Millions
12 Months Ended
Dec. 31, 2025
CNY (¥)
Directors
shares
Dec. 31, 2025
USD ($)
shares
Dec. 31, 2024
CNY (¥)
shares
Dec. 31, 2023
CNY (¥)
shares
Dec. 31, 2025
USD ($)
Directors
Schedule of Investments [Line Items]          
Impairment charges recognized on equity investments measured at fair value using the measurement alternative ¥ 263 $ 38 ¥ 292 ¥ 753  
Trip.com Group, Ltd          
Schedule of Investments [Line Items]          
Percentage Of equity interest held by company 7.00%   7.00%   7.00%
Fair value of equity investment ¥ 23,100       $ 3,300
Gains on equity method investments | ¥     ¥ 1,900 ¥ 1,400  
Equity method investment, disposal of ADS | shares 0 0 13 10  
Number of directors 8       8
Trip.com Group, Ltd | Active directors          
Schedule of Investments [Line Items]          
Number of directors 1       1