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Provisions - Summary of Changes in greenhouse gas emissions rights (Parenthetical) (Detail)	12 Months Ended
	Dec. 31, 2021 kT
Disclosure of Detailed Information About Changes in Changes in Greenhouse Gas Emissions Rights [Abstract]
Estimated greenhouse gas emission	17,618

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- Definition

Disclosure of detailed information about changes in changes in greenhouse gas emissions rights.

+ References

No definition available.

+ Details

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- Definition

Estimated greenhouse gas emission.

+ References

No definition available.

+ Details

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