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Short-Term Borrowings - Additional Information (Detail) $ in Thousands | 1 Months Ended | 12 Months Ended |  |  |  |
--- | --- | --- | --- | --- | --- | ---
Jul. 31, 2021 CNY (¥) | Dec. 31, 2021 CNY (¥) | Dec. 31, 2021 USD ($) | Dec. 31, 2020 CNY (¥) | Dec. 31, 2019 CNY (¥) | Dec. 31, 2021 USD ($) | Jul. 31, 2021 USD ($) | Jul. 01, 2021 CNY (¥) | Jul. 01, 2021 USD ($) | Jan. 31, 2021 CNY (¥) | Jan. 31, 2021 USD ($)
Short-term Debt [Line Items] |  |  |  |  |  |  |  |  |  |  |
Available Short term borrowings |  | ¥ 3,121,000,000.0 |  | ¥ 1,234,522,000 |  | $ 489,800 |  |  |  |  |
Short term debt, Description |  | secured RMB denominated borrowings from financial institutions in the PRC that are repayable within one year. | secured RMB denominated borrowings from financial institutions in the PRC that are repayable within one year. |  |  |  |  |  |  |  |
Short term debt, Weighted average interest rate |  | 3.67% |  | 3.39% |  | 3.67% |  |  |  |  |
Repayment of short term borrowings |  | ¥ 7,672,124,000 | $ 1,203,924 | ¥ 210,117,000 | ¥ 906,582,000 |  |  |  |  |  |
Proceeds from short-term borrowings |  | 9,558,649,000 | 1,499,962 | 1,444,638,000 | ¥ 845,583,000 |  |  |  |  |  |
Reversed Factoring Arrangements [Member] |  |  |  |  |  |  |  |  |  |  |
Short-term Debt [Line Items] |  |  |  |  |  |  |  |  |  |  |
Available Short term borrowings |  | 4,448,400,000 |  | 15,100,000 |  | $ 698,000 |  |  |  |  |
Collateral from bank |  | 2,769,700,000 |  |  |  | 434,600 |  |  |  |  |
Proceeds from short-term borrowings |  | 8,220,600,000 | $ 1,290,000 | 945,000,000.0 |  |  |  |  |  |  |
Two Thousand And Twenty Reversed Factoring Arrangement [Member] |  |  |  |  |  |  |  |  |  |  |
Short-term Debt [Line Items] |  |  |  |  |  |  |  |  |  |  |
Available Short term borrowings |  |  |  | 15,100,000 |  |  |  |  |  |  |
Two Thousand And Twenty One Reversed Factoring Arrangement One [Member] |  |  |  |  |  |  |  |  |  |  |
Short-term Debt [Line Items] |  |  |  |  |  |  |  |  |  |  |
Available Short term borrowings |  | 39,800,000 |  |  |  | 6,200 |  |  |  |  |
Restricted cash |  |  |  | 66,000.0 |  |  |  |  |  |  |
Two Thousand And Twenty One Reversed Factoring Arrangement Two [Member] |  |  |  |  |  |  |  |  |  |  |
Short-term Debt [Line Items] |  |  |  |  |  |  |  |  |  |  |
Available Short term borrowings |  |  |  | 1,550,500,000 |  | 243,300 |  |  |  |  |
Line of Credit [Member] |  |  |  |  |  |  |  |  |  |  |
Short-term Debt [Line Items] |  |  |  |  |  |  |  |  |  |  |
Short term debt, Unused borrowing capacity |  | 135,000,000.0 |  | 20,400,000 |  | 21,200 |  |  |  |  |
Bank Loans and Notes Payable [Member] |  |  |  |  |  |  |  |  |  |  |
Short-term Debt [Line Items] |  |  |  |  |  |  |  |  |  |  |
Available Short term borrowings |  | ¥ 2,858,100,000 |  |  |  | $ 448,500 |  |  |  |  |
Short term debt, Percentage bearing fixed interest rate | 3.60% | 3.60% |  |  |  | 3.60% | 3.60% |  |  |  |
Bank Loans and Notes Payable [Member] | Reversed Factoring Arrangements [Member] |  |  |  |  |  |  |  |  |  |  |
Short-term Debt [Line Items] |  |  |  |  |  |  |  |  |  |  |
Available Short term borrowings |  | ¥ 2,491,000,000.0 |  | ¥ 784,900,000 |  | $ 390,900 |  |  |  |  |
Short term debt, Percentage bearing fixed interest rate | 3.60% |  |  | 3.60% |  |  | 3.60% |  |  |  |
Short term debt, Terms | six | within six months | within six months |  |  |  |  |  |  |  |
Repayment of short term borrowings |  | ¥ 6,514,500,000 | $ 1,022,300 | ¥ 160,100,000 |  |  |  |  |  |  |
Short term debt, Maximum borrowing capacity | ¥ 5,000,000,000 | ¥ 1,800,000,000.0 |  | ¥ 800,000,000.0 |  | $ 282,500 | $ 784,600 | ¥ 300,000,000.0 | $ 47,100 | ¥ 2,000,000,000 | $ 313,800
Bank Loans and Notes Payable [Member] | Two Thousand And Twenty One Reversed Factoring Arrangement One [Member] |  |  |  |  |  |  |  |  |  |  |
Short-term Debt [Line Items] |  |  |  |  |  |  |  |  |  |  |
Short term debt, Percentage bearing fixed interest rate |  | 3.60% |  |  |  | 3.60% |  |  |  |  |
Short term debt, Maximum borrowing capacity |  | ¥ 40,000,000.0 |  |  |  | $ 6,300 |  |  |  |  |
Bank Loans and Notes Payable [Member] | Two Thousand And Twenty One Reversed Factoring Arrangement Two [Member] |  |  |  |  |  |  |  |  |  |  |
Short-term Debt [Line Items] |  |  |  |  |  |  |  |  |  |  |
Short term debt, Maximum borrowing capacity |  | ¥ 99,400,000 |  |  |  | $ 15,600 |  |  |  |  |

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