v3.26.1
Summary of significant accounting policies- Long-lived assets (Details)
¥ in Millions, $ in Millions
 12 Months Ended
Mar. 31, 2026
CNY (¥)
Mar. 31, 2026
USD ($)
Mar. 31, 2025
CNY (¥)
Mar. 31, 2024
CNY (¥)
Summary of significant accounting policies        
Amortization expenses ¥ 10,051 $ 1,456 ¥ 13,199 ¥ 17,864
Impairment of long-lived assets other than goodwill and licensed copyrights ¥ 3,318   ¥ 4,611 ¥ 14,847
User base and customer relationships | Minimum        
Summary of significant accounting policies        
Estimated useful lives of intangible assets (in months/years) 3 years 3 years    
User base and customer relationships | Maximum        
Summary of significant accounting policies        
Estimated useful lives of intangible assets (in months/years) 16 years 16 years    
Trade names, trademarks and domain names | Minimum        
Summary of significant accounting policies        
Estimated useful lives of intangible assets (in months/years) 5 years 5 years    
Trade names, trademarks and domain names | Maximum        
Summary of significant accounting policies        
Estimated useful lives of intangible assets (in months/years) 20 years 20 years    
Developed technology and patents | Minimum        
Summary of significant accounting policies        
Estimated useful lives of intangible assets (in months/years) 2 years 2 years    
Developed technology and patents | Maximum        
Summary of significant accounting policies        
Estimated useful lives of intangible assets (in months/years) 10 years 10 years    
Non-compete agreements | Maximum        
Summary of significant accounting policies        
Estimated useful lives of intangible assets (in months/years) 10 years 10 years    
Licensed copyrights | Hujing Digital Media and Entertainment Group        
Summary of significant accounting policies        
Impairment, Intangible Asset, Finite-Lived, Statement of Income or Comprehensive Income [Extensible Enumeration] Finite-Lived Intangible Assets, Net Finite-Lived Intangible Assets, Net Finite-Lived Intangible Assets, Net Finite-Lived Intangible Assets, Net
Impairment charges ¥ 0   ¥ 0 ¥ 0
Licensed copyrights | Cost of revenue | Hujing Digital Media and Entertainment Group        
Summary of significant accounting policies        
Amortization expenses ¥ 6,701   ¥ 7,497 ¥ 8,361
Licensed copyrights | Minimum        
Summary of significant accounting policies        
Estimated useful lives of intangible assets (in months/years) 6 months 6 months    
Licensed copyrights | Maximum        
Summary of significant accounting policies        
Estimated useful lives of intangible assets (in months/years) 10 years 10 years    
Computer equipment and software | Minimum        
Summary of significant accounting policies        
Estimated useful lives of property and equipment (in years) 3 years 3 years    
Computer equipment and software | Maximum        
Summary of significant accounting policies        
Estimated useful lives of property and equipment (in years) 5 years 5 years    
Furniture, office and transportation equipment and others | Minimum        
Summary of significant accounting policies        
Estimated useful lives of property and equipment (in years) 3 years 3 years    
Furniture, office and transportation equipment and others | Maximum        
Summary of significant accounting policies        
Estimated useful lives of property and equipment (in years) 10 years 10 years    
Building and other property | Minimum        
Summary of significant accounting policies        
Estimated useful lives of property and equipment (in years) 10 years 10 years    
Building and other property | Maximum        
Summary of significant accounting policies        
Estimated useful lives of property and equipment (in years) 50 years 50 years