Summary of Significant Accounting Policies - Additional Information (Details) ¥ in Thousands	12 Months Ended
Dec. 31, 2025 CNY (¥) segment	Dec. 31, 2024 CNY (¥) segment	Dec. 31, 2023 CNY (¥) segment
Principles of consolidation
Government grants	¥ 704,602	¥ 635,673	¥ 495,078
Government Assistance, Operating Income, Increase (Decrease), Statement of Income or Comprehensive Income [Extensible Enumeration]	Other Operating Income (Expense), Net	Other Operating Income (Expense), Net	Other Operating Income (Expense), Net
Marketing expenses
Advertising expenses	¥ 2,010,000	¥ 1,970,000	¥ 1,820,000
Number of operating segments \| segment	5	5	5
Maximum
Lease
Lessee operating lease term of contract	16 years
Lessor operating lease term of contract	25 years
Minimum
Lease
Lessee operating lease term of contract	12 months
Lessor operating lease term of contract	12 months

Amount charged to advertising expense for the period, which are expenses incurred with the objective of increasing revenue for a specified brand, product or product line.

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Number of operating segments. An operating segment is a component of an enterprise: (a) that engages in business activities from which it may earn revenues and incur expenses (including revenues and expenses relating to transactions with other components of the same enterprise), (b) whose operating results are regularly reviewed by the enterprise's chief operating decision maker to make decisions about resources to be allocated to the segment and assess its performance, and (c) for which discrete financial information is available. An operating segment may engage in business activities for which it has yet to earn revenues, for example, start-up operations may be operating segments before earning revenues.

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