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Finance Costs - Summary of Finance Costs (Detail) - CNY (¥)
¥ in Millions
12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Analysis of income and expense [abstract]      
Interest for lease liabilities ¥ 3,052    
Interest on short-term deposits received (note 35(a)) 187 ¥ 142 ¥ 21
Interest on bonds     187
Others 7 2 2
Finance costs ¥ 3,246 ¥ 144 ¥ 210