Equity - Significant reclassifications out of accumulated other comprehensive (loss) in shareholders' equity (Details) - USD ($) $ in Thousands	12 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2018
Accumulated Other Comprehensive Income (Loss) [Line Items]
Other (income) expense, net	$ 67,112	$ 61,247	$ (12,991)
Income before income taxes	1,512,627	1,933,425	1,702,277
Tax benefit	(305,924)	(420,494)	(640,962)
Net income	1,206,703	1,512,931	$ 1,061,315
Reclassification out of Accumulated Other Comprehensive Income | Amortization of prior service cost and initial net obligation
Accumulated Other Comprehensive Income (Loss) [Line Items]
Other (income) expense, net	(5,531)	(6,552)
Reclassification out of Accumulated Other Comprehensive Income | Recognized actuarial loss
Accumulated Other Comprehensive Income (Loss) [Line Items]
Other (income) expense, net	(165,550)	(121,534)
Reclassification out of Accumulated Other Comprehensive Income | Retirement benefit plans
Accumulated Other Comprehensive Income (Loss) [Line Items]
Income before income taxes	(171,081)	(128,086)
Tax benefit	41,466	30,656
Net income	$ (129,615)	$ (97,430)