Financial instruments - Fair value of derivative instruments reported in consolidated balance sheet (Details) - USD ($) $ in Thousands	Sep. 30, 2021	Jun. 30, 2021
Cross-currency swap contracts \| Other liabilities
Net investment hedges
Cross-currency swap contracts	$ 53,723	$ 71,798
Forward exchange contracts \| Non-trade and notes receivable
Cash flow hedges
Cash flow hedge, assets	9,463	5,376
Forward exchange contracts \| Other accrued liabilities
Cash flow hedges
Cash flow hedge, liability	6,364	9,435
Costless collar contracts \| Non-trade and notes receivable
Cash flow hedges
Cash flow hedge, assets	807	110
Costless collar contracts \| Other accrued liabilities
Cash flow hedges
Cash flow hedge, liability	$ 3,308	$ 901

Fair value of all asset derivatives designated as cash flow hedging instruments.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 4B
-Subparagraph (c)(1)
-URI http://asc.fasb.org/extlink&oid=125515794&loc=SL5624163-113959

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Fair value of all liability derivatives designated as cash flow hedging instruments.

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Fair value of all derivative liabilities designated as hedges of net investment in foreign operations.

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