Equity - Reclassifications out of accumulated other comprehensive income (loss) in shareholders' equity (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Mar. 31, 2025	Mar. 31, 2024	Mar. 31, 2025	Mar. 31, 2024
Accumulated Other Comprehensive Income (Loss) [Line Items]
Other income, net	$ 44,713	$ 65,406	$ 404,230	$ 228,872
Total before tax	994,814	920,043	3,035,857	2,608,643
Tax benefit	(33,628)	(193,309)	(427,494)	(548,780)
Net income	961,186	726,734	2,608,363	2,059,863
Income (Expense) Reclassified from Accumulated Other Comprehensive (Loss) | Amortization of prior service cost and initial net obligation
Accumulated Other Comprehensive Income (Loss) [Line Items]
Other income, net	(846)	(319)	(2,499)	(955)
Income (Expense) Reclassified from Accumulated Other Comprehensive (Loss) | Recognized actuarial (loss)
Accumulated Other Comprehensive Income (Loss) [Line Items]
Other income, net	(3,628)	(1,555)	(11,179)	(4,656)
Income (Expense) Reclassified from Accumulated Other Comprehensive (Loss) | Retirement benefit plans
Accumulated Other Comprehensive Income (Loss) [Line Items]
Total before tax	(4,474)	(1,874)	(13,678)	(5,611)
Tax benefit	1,138	505	3,481	1,513
Net income	$ (3,336)	$ (1,369)	$ (10,197)	$ (4,098)