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Property, plant and equipment - Estimated useful lives (Details)	12 Months Ended
	Dec. 31, 2020
Vessels
Property, plant and equipment
Useful life	20 years
Minimum | Building
Property, plant and equipment
Useful life	3 years
Minimum | Facilities
Property, plant and equipment
Useful life	3 years
Minimum | Equipment
Property, plant and equipment
Useful life	3 years
Minimum | Locomotives
Property, plant and equipment
Useful life	12 years
Minimum | Wagon
Property, plant and equipment
Useful life	30 years
Minimum | Railway equipment
Property, plant and equipment
Useful life	5 years
Minimum | Others
Property, plant and equipment
Useful life	2 years
Maximum | Building
Property, plant and equipment
Useful life	50 years
Maximum | Facilities
Property, plant and equipment
Useful life	50 years
Maximum | Equipment
Property, plant and equipment
Useful life	40 years
Maximum | Locomotives
Property, plant and equipment
Useful life	25 years
Maximum | Wagon
Property, plant and equipment
Useful life	44 years
Maximum | Railway equipment
Property, plant and equipment
Useful life	33 years
Maximum | Others
Property, plant and equipment
Useful life	50 years

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- Definition

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+ References

No definition available.

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- Definition

The useful life, measured as period of time, used for property, plant and equipment. [Refer: Property, plant and equipment]

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IAS
-Number 16
-IssueDate 2020-01-01
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