XML 147 R133.htm IDEA: XBRL DOCUMENT v3.21.1
Leases - Additional Information (Detail)
¥ in Millions, $ in Millions
12 Months Ended
Dec. 31, 2020
CNY (¥)
Dec. 31, 2020
USD ($)
Dec. 31, 2019
CNY (¥)
Statement [line items]      
Cash outflows for leases ¥ 51.9 $ 8.0 ¥ 65.6
Non-cash additions to right-of-use assets and lease liabilities 15.3 2.4 11.5
Operating lease rental income ¥ 13.3 $ 2.1 ¥ 11.9
Bottom of range [member]      
Statement [line items]      
Operating lease, term 1 year 1 year  
Operating lease term of contract 1 year 1 year  
Top of range [member]      
Statement [line items]      
Operating lease, term 15 years 15 years  
Operating lease term of contract 6 years 6 years