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Risk Management Activities - Credit Risk - Additional Information (Detail)	12 Months Ended
	Dec. 31, 2019
PERU [Member]
Disclosure Of Financial Risk Management [line items]
Percentage Of Cash Receipts On Revenue Recognition	90.00%
Percentage Of Cash Receipts At The End Of Quotation Period	10.00%
Counter party exposure [member]
Disclosure Of Financial Risk Management [line items]
Percentage of maximum investment in financial institutions' equity	2.50%

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- Definition

Line items represents information about financial risk management.

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- Definition

Percentage of cash receipts at the end of quotation period.

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- Definition

Percentage of cash receipts on revenue recognition.

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- Definition

Percentage of maximum investment in financial institutions' equity.

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