Financial instruments - Fair value of derivative instruments reported in consolidated balance sheet (Details) - USD ($) $ in Thousands	Sep. 30, 2023	Jun. 30, 2023
Cross-currency swap contracts \| Investments and other assets
Net investment hedges
Cross-currency swap contracts, assets	$ 26,725	$ 21,578
Forward exchange contracts \| Non-trade and notes receivable
Other derivative contracts
Other derivative contracts, assets	$ 418	$ 0

Fair value as of the balance sheet date of derivative instrument not designated as hedging instrument and classified as an asset.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 4B
-Subparagraph (c)(2)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147480434/815-10-50-4B

Name:	us-gaap_DerivativeInstrumentsNotDesignatedAsHedgingInstrumentsAssetAtFairValue
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant