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Trade and Bills Receivables - Summary of Trade and Bills Receivables (Parenthetical) (Detail) ¥ in Thousands, $ in Thousands | Dec. 31, 2017 CNY (¥) | Dec. 31, 2017 USD ($) | Dec. 31, 2016 CNY (¥)
--- | --- | --- | ---
Disclosure of financial assets [Line Items] |  |  |
Bills receivable | ¥ 6,819,440 | $ 1,077,423 | ¥ 6,816,088
Joint Ventures [Member] |  |  |
Disclosure of financial assets [Line Items] |  |  |
Bills receivable | 69,816 | 11,030 | 45,000
Other related parties [Member] |  |  |
Disclosure of financial assets [Line Items] |  |  |
Bills receivable | ¥ 23,832 | $ 3,765 | ¥ 3,968

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- Definition Current bills receivable. + References No definition available. + Details
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Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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- Definition Line items represent concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes of the table. + References No definition available. + Details
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Namespace Prefix: | ifrs-full_
Data Type: | xbrli:stringItemType
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- Details
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Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
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Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |