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Technology platform-based income - Summary of Technology platform based income (Detail) - CNY (¥)
¥ in Thousands
12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Disclosure of disaggregation of revenue from contracts with customers [line items]      
Revenue ¥ 29,218,432 ¥ 38,294,317 ¥ 41,221,842
Retail Credit and Enablement Service Fees [Member]      
Disclosure of disaggregation of revenue from contracts with customers [line items]      
Revenue 28,621,121 36,793,020 39,587,797
Other Technology Platform Based Income [Member]      
Disclosure of disaggregation of revenue from contracts with customers [line items]      
Revenue ¥ 597,311 ¥ 1,501,297 ¥ 1,634,045