Financial instruments - Narrative (Details) $ in Thousands, € in Millions, ¥ in Billions	1 Months Ended	9 Months Ended
	Mar. 31, 2025 EUR (€)	Mar. 31, 2025 USD ($)	Mar. 31, 2024 USD ($)	Mar. 31, 2025 JPY (¥)	Feb. 20, 2025 EUR (€)
Debt Instrument [Line Items]
Payments for long-term borrowings | $		$ 1,730,510	$ 264,411
Currency Swap, Due November 2034
Debt Instrument [Line Items]
Notional amount of derivative	€ 69			¥ 2.1
Currency Swap, Due May 2038
Debt Instrument [Line Items]
Notional amount of derivative	290
Senior Notes | 2.90% Senior Notes Due 2030
Debt Instrument [Line Items]
Aggregate principal amount (in EUR)	€ 700				€ 700
Interest rate					2.90%
Senior Notes | 1.125% Senior Notes Due 2025
Debt Instrument [Line Items]
Interest rate	1.125%			1.125%
Payments for long-term borrowings	€ 700