Property, plant, and equipment is recognized at acquisition or construction cost, including financial charges incurred on property, plant, and equipment under construction (see Note 12), as well as maintenance costs resulting from scheduled plant outages and estimated costs to remove, to decommission, or to restore assets (see Notes 2.m and 19), less accumulated depreciation and, when applicable, less provision for losses.
Depreciation is calculated using the straight-line method, over the periods mentioned in Note 12, taking into account the estimated useful lives of the assets, which are reviewed annually.
Leasehold improvements are depreciated over the shorter of the lease contract term and useful life of the property.