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Financial Risk Management - Additional Information (Details)
12 Months Ended
Dec. 31, 2023
CNY (¥)
Customer
Dec. 31, 2022
CNY (¥)
Customer
Financial Risk Management [Line Items]    
Borrowings ¥ 5,636,000,000 ¥ 5,536,000,000
Customers represented percentage of revenue 10.00% 10.00%
Number of customers accounted for revenues | Customer 0 0
Recurring Fair Value Measurement    
Financial Risk Management [Line Items]    
Transfer between Level 1 and 2, assets ¥ 0 ¥ 0
Transfer between Level 2 and 1, assets 0 ¥ 0
Foreign Exchange Risk    
Financial Risk Management [Line Items]    
Effect Of Changes In Currency Rate   5.00%
Foreign Exchange Risk | USD    
Financial Risk Management [Line Items]    
Financial assets 9,000,000 ¥ 9,000,000
Financial liabilities 72,000,000 34,000,000
Foreign Exchange Risk | RMB    
Financial Risk Management [Line Items]    
Financial assets 2,000,000 5,000,000
Financial liabilities 37,000,000 22,000,000
Equity Price Risk    
Financial Risk Management [Line Items]    
Post-tax profit 17,000,000 17,000,000
Impact in other comprehensive income 327,000,000 158,000,000
Lease Liabilities Payable | Liquidity Risk | Less than 1 year    
Financial Risk Management [Line Items]    
contractual undiscounted cash flows 141,000,000 196,000,000
Lease Liabilities Payable | Liquidity Risk | Between 2 and 5 years    
Financial Risk Management [Line Items]    
contractual undiscounted cash flows 326,000,000 347,000,000
Lease Liabilities Payable | Liquidity Risk | Over 5 years    
Financial Risk Management [Line Items]    
contractual undiscounted cash flows 10,000,000 27,000,000
Accounts Payable | Liquidity Risk | Less than 1 year    
Financial Risk Management [Line Items]    
contractual undiscounted cash flows 4,976,000,000 5,000,000,000
Accounts Payable | Liquidity Risk | Between 2 and 5 years    
Financial Risk Management [Line Items]    
contractual undiscounted cash flows 0 50,000,000
Senior Unsecured Notes | Less than 1 year    
Financial Risk Management [Line Items]    
Borrowings 100,000,000 98,000,000
Senior Unsecured Notes | Between 2 and 5 years    
Financial Risk Management [Line Items]    
Borrowings 2,437,000,000 2,425,000,000
Senior Unsecured Notes | Over 5 years    
Financial Risk Management [Line Items]    
Borrowings ¥ 3,683,000,000 ¥ 3,691,000,000