Income Taxes - Differences comprising the net deferred taxes shown on consolidated balance sheet (Details) - USD ($) $ in Thousands	12 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2021
Income Tax Disclosure [Abstract]
Retirement benefits	$ 158,560	$ 207,147
Other liabilities and reserves	333,012	180,624
Long-term contracts	37,747	8,739
Stock-based compensation	33,374	31,490
Loss carryforwards	1,083,732	888,552
Unrealized currency exchange gains and losses	(1,680)	254,334
Inventory	96,501	14,649
Tax credit carryforwards	18,773	17,326
Undistributed foreign earnings	(21,304)	(21,822)
Depreciation and amortization	(2,228,606)	(875,623)
Valuation allowance	(1,078,354)	(901,875)
Net deferred tax (liability)	(1,568,245)	(196,459)
Change in net deferred tax (liability):
Provision for deferred tax	(91,865)	351,201	$ 51,500
Items of other comprehensive (loss) income	(64,342)	(98,810)
Acquisitions and other	(1,215,579)	880
Total change in net deferred tax	$ (1,371,786)	$ 253,271