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Financial Risk Management Objectives and Policies - Summary of Information about Credit Risk on Trade Receivables using Provision Matrix (Detail)
¥ in Thousands, $ in Thousands
Dec. 31, 2021
CNY (¥)
Dec. 31, 2021
USD ($)
Dec. 31, 2020
CNY (¥)
Disclosure of provision matrix [line items]      
Financial assets ¥ 12,434,653 $ 1,966,825 ¥ 14,612,382
Expected credit loss ¥ 33,210 $ 5,253 ¥ 43,519
Trade receivables [member]      
Disclosure of provision matrix [line items]      
Expected credit loss rate 6.00% 6.00% 13.10%
Expected credit loss ¥ 33,210   ¥ 43,519
Trade receivables [member] | Cost [member]      
Disclosure of provision matrix [line items]      
Financial assets 557,767   332,567
Current [member] | Trade receivables [member] | Cost [member]      
Disclosure of provision matrix [line items]      
Financial assets ¥ 279,402   ¥ 126,706
Days past due 0- 90 days [member] | Trade receivables [member]      
Disclosure of provision matrix [line items]      
Expected credit loss rate 0.60% 0.60% 4.20%
Expected credit loss ¥ 916   ¥ 3,860
Days past due 0- 90 days [member] | Trade receivables [member] | Cost [member]      
Disclosure of provision matrix [line items]      
Financial assets ¥ 154,494   ¥ 91,233
Days Past due 91-180 days [member] | Trade receivables [member]      
Disclosure of provision matrix [line items]      
Expected credit loss rate 5.90% 5.90% 4.90%
Expected credit loss ¥ 2,234   ¥ 1,451
Days Past due 91-180 days [member] | Trade receivables [member] | Cost [member]      
Disclosure of provision matrix [line items]      
Financial assets ¥ 37,756   ¥ 29,675
Days past due 181-365 days [member] | Trade receivables [member]      
Disclosure of provision matrix [line items]      
Expected credit loss rate 13.20% 13.20% 7.80%
Expected credit loss ¥ 5,707   ¥ 2,852
Days past due 181-365 days [member] | Trade receivables [member] | Cost [member]      
Disclosure of provision matrix [line items]      
Financial assets ¥ 43,084   ¥ 36,413
Days past due greater than 365 days [member] | Trade receivables [member]      
Disclosure of provision matrix [line items]      
Expected credit loss rate 56.60% 56.60% 72.80%
Expected credit loss ¥ 24,355   ¥ 35,356
Days past due greater than 365 days [member] | Trade receivables [member] | Cost [member]      
Disclosure of provision matrix [line items]      
Financial assets ¥ 43,031   ¥ 48,540