Financial instruments risk (Tables)

12 Months Ended

Dec. 31, 2020

Financial instruments risk [Abstract]

Monetary Assets and Liabilities Denominated in Foreign Currencies

As of December 31, 2020 and 2019, the Company held monetary assets and liabilities denominated in foreign currencies other than the Mexican peso, translated at the corresponding interbank exchange rate as related to the Mexican peso, as follows:

	2020						2019
	US dollar			Other currencies			US dollar			Other currencies
Assets	$	309,657		$	932		$	547,320		$	1,093
Liabilities		(480,253	)		(1,372	)		(1,042,661	)		(1,641	)
	$	(170,596	)	$	(440	)	$	(495,341	)	$	(548	)

Sensitivity analysis [Abstract]

Expected Credit Loss for Trade Accounts Receivable

Pursuant to the foregoing, the expected credit loss for trade accounts receivable as of December 31, 2020 and 2019 was determined as follows:

	Trade accounts receivable days in arrears
	Current			More than 30 days			More than 60 days			More than 90 days			Total
As of December 31, 2020
Expected credit loss rate		0.0	%		0.0	%		0.0	%		32.7	%		-
Gross carrying value	$	77,030		$	5,875		$	4,290		$	64,841		$	152,036
Expected credit losses during the lifetime											21,218			21,218
As of December 31, 2019
Expected credit loss rate		0.0	%		0.0	%		2.3	%		27.4	%		-
Gross carrying value	$	214,850		$	18,398		$	7,976		$	51,748		$	292,972
Expected credit losses during the lifetime								185			14,200			14,385

Contractual Maturities of Financial Liabilities

As of December 31, 2020, and 2019, the financial liabilities of Grupo TMM have contractual maturities (including interest payments as applicable) are summarized as follows:

	Current				Non-Current
	In 6 months		6 to 12 Months		1 to 4 years		More than 4 Years
At December 31, 2020
Trade payables	$	228,959	$	-	$	-	$	-
Accounts payable and accrued expenses		-		525,108		23,522		-
Leasing liabilities		29,465		28,780		193,811		103,457
Financial debt		52,125		76,960		48,227		5,417
	$	310,549	$	630,848	$	265,560	$	108,874

	Current				Non-Current
	In 6 months		6 to 12 Months		1 to 4 years		More than 4 Years
At December 31, 2019
Trade payables	$	-	$	262,159	$	-	$	-
Accounts payable and accrued expenses		-		499,529		46,742		-
Leasing liabilities		34,908		25,670		130,238		396,543
Financial debt		55,139		84,050		113,288		5,449
	$	90,047	$	871,408	$	290,268	$	401,992

Currency Risk [Member]

Sensitivity analysis [Abstract]

Sensitivity Analysis

If the peso had strengthened or weakened against the USD by 11.64% for 2020 and 22.10% for 2019, this would have had the following impact on the monetary position:

	2020						2019
	11.64% Increase in  the exchange rate			11.64% Decrease in the exchange rate			22.10% Increase in the exchange rate			22.10% Decrease in the exchange rate
Assets in US dollars	$	36,030		$	(36,030	)	$	120,944		$	(120,944	)
Assets in other currencies		108			(108	)		242			(242	)
Liabilities in US dollars		(55,880	)		55,880			(230,401	)		230,401
Liabilities in other currencies		(160	)		160			(363	)		363
	$	(19,902	)	$	19,902		$	(109,578	)	$	109,578

Interest Rate Risks [Member]

Sensitivity analysis [Abstract]

Sensitivity Analysis

The calculations are based on a variance in the average market interest rate for each period and the financial instruments on the reporting date that are sensitive to variances in the interest rates. The rest of the variables remain constant.

	2020					2019
	+8.24% Variance			-8.24% Variance		+7.05% Variance			-7.05% Variance
Profit or loss for the year	$	(1,140	)	$	1,140	$	(1,698	)	$	1,698