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SEGMENT AND RELATED INFORMATION: - Receivables (Details) - USD ($) $ in Millions	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Financial information related to segments
Trade receivables	$ 822.4	$ 890.6	$ 591.9
Related parties receivable current:	101.5	26.1	23.4
Corporate, other and eliminations
Financial information related to segments
Related parties receivable current:	19.9	8.1	10.5
Mexican Open-pit
Financial information related to segments
Trade receivables	505.9	556.2	365.2
Related parties receivable current:	81.6	18.0	12.9
Mexican IMMSA Unit
Financial information related to segments
Trade receivables	50.5	79.7	47.1
Peruvian Operations
Financial information related to segments
Trade receivables	$ 266.0	$ 254.7	$ 179.6

X

- Definition

Amount due from customers or clients, within one year of the balance sheet date (or the normal operating cycle, whichever is longer), for goods or services (including trade receivables) that have been delivered or sold in the normal course of business, reduced to the estimated net realizable fair value by an allowance established by the entity of the amount it deems uncertain of collection.

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The aggregate amount of receivables to be collected from related parties where one party can exercise control or significant influence over another party; including affiliates, owners or officers and their immediate families, pension trusts, and so forth, at the financial statement date. which are usually due within one year (or one business cycle).

+ References

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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