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Commitments and contingencies - Open tax procedures (Details)			12 Months Ended
	Nov. 13, 2020 PEN (S/)	Nov. 13, 2020 USD ($)	Dec. 31, 2021 USD ($)	Dec. 31, 2020 PEN (S/)	Dec. 31, 2020 USD ($)
Disclosure of Commitments and contingencies [Line Items]
Compulsory collection of income tax			$ 720,812,000
Tax Assessments, penalties and interest expenses			468,400,000
Tax Assessments Estimated Possible Losses			$ 252,412,000
SUNAT. \| Year 2007 and 2008
Disclosure of Commitments and contingencies [Line Items]
Compulsory collection of income tax	S/ 1,567,297,000	$ 392,013,000
Tax Assessments, penalties and interest expenses	1,375,248,000	343,984,000
Collection of debt forced amount				S/ 72,065,000	$ 18,130,000
Tax Assessments Estimated Possible Losses	S/ 192,049,000	$ 48,036,000