Equity - Reclassifications out of accumulated other comprehensive income (loss) in shareholders' equity (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2024	Dec. 31, 2023
Accumulated Other Comprehensive Income (Loss) [Line Items]
Other income, net	$ 328,716	$ 85,011	$ 359,517	$ 163,466
Total before tax	1,165,857	868,165	2,041,043	1,688,600
Tax benefit	(217,208)	(186,108)	(393,866)	(355,471)
Net income	948,649	682,057	1,647,177	1,333,129
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	(826)	(334)	(1,653)	(636)
Income (Expense) Reclassified from Accumulated Other Comprehensive (Loss) | Recognized actuarial loss
Accumulated Other Comprehensive Income (Loss) [Line Items]
Other income, net	(3,747)	(2,309)	(7,551)	(3,101)
Income (Expense) Reclassified from Accumulated Other Comprehensive (Loss) | Retirement benefit plans
Accumulated Other Comprehensive Income (Loss) [Line Items]
Total before tax	(4,573)	(2,643)	(9,204)	(3,737)
Tax benefit	1,163	732	2,343	1,008
Net income	$ (3,410)	$ (1,911)	$ (6,861)	$ (2,729)