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Repayment of Principal Amount of Long Term Debts (Detail) - Dec. 31, 2019 - Long Term Debt
¥ in Millions, $ in Millions
CNY (¥)
USD ($)
Long Term Debt Maturities Repayments Of Principal [Line Items]    
2020 ¥ 5,987 $ 860
2021 7,902 1,135
2022 11,487 1,650
2023 6,962 1,000
2024 5,918 850
Thereafter ¥ 13,924 $ 2,000