Summary of Significant Accounting Policies - Leases and Segment reporting (Details)
¥ in Thousands, $ in Thousands
12 Months Ended
Dec. 31, 2022
CNY (¥)
segment
Dec. 31, 2022
USD ($)
Dec. 31, 2021
CNY (¥)
Jan. 01, 2018
CNY (¥)
New Accounting Pronouncements or Change in Accounting Principle [Line Items]        
Operating lease right-of-use assets, net ¥ 3,538,911 $ 513,094 ¥ 2,061,492  
Operating lease liabilities, current 696,454 100,976 473,245  
Operating lease liabilities, noncurrent ¥ 1,946,367 $ 282,197 ¥ 1,369,825  
Operating lease term (in years) 50 years 50 years    
Number of reportable segments | segment 1      
Minimum [Member]        
New Accounting Pronouncements or Change in Accounting Principle [Line Items]        
Terms of operating and finance leases (in years) 1 year      
Maximum [Member]        
New Accounting Pronouncements or Change in Accounting Principle [Line Items]        
Terms of operating and finance leases (in years) 20 years      
Land use rights        
New Accounting Pronouncements or Change in Accounting Principle [Line Items]        
Operating lease term (in years) 50 years 50 years    
ASU 2016-02 | Cumulative Effect, Period of Adoption, Adjustment [Member]        
New Accounting Pronouncements or Change in Accounting Principle [Line Items]        
Operating lease right-of-use assets, net       ¥ 158,770
Operating lease liabilities, current       14,575
Operating lease liabilities, noncurrent       ¥ 142,751