Equity - Significant reclassifications out of accumulated other comprehensive (loss) in shareholders' equity (Details) - USD ($) $ in Thousands	3 Months Ended						12 Months Ended
	Mar. 31, 2021	Dec. 31, 2020	Sep. 30, 2020	Mar. 31, 2020	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2021		Jun. 30, 2020		Jun. 30, 2019
Accumulated Other Comprehensive Income (Loss) [Line Items]
Other (income) expense, net							$ 17,003		$ 67,112	[1]	$ 61,247	[1]
Income before income taxes	$ 599,340	$ 577,892	$ 413,174	$ 461,213	$ 251,380	$ 431,905	2,246,957		1,506,854	[1]	1,949,475	[1]
Tax benefit	(126,101)	(129,350)	(93,063)	(88,501)	(49,331)	(93,811)	(500,096)		(304,522)	[1]	(424,392)	[1]
Net income	$ 473,239	$ 448,542	$ 320,111	$ 372,712	$ 202,049	$ 338,094	1,746,861	[2]	1,202,332	[2],[3]	$ 1,525,083	[2],[4]
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							(5,270)		(5,531)
Reclassification out of Accumulated Other Comprehensive Income | Recognized actuarial loss
Accumulated Other Comprehensive Income (Loss) [Line Items]
Other (income) expense, net							(207,896)		(165,550)
Reclassification out of Accumulated Other Comprehensive Income | Retirement benefit plans
Accumulated Other Comprehensive Income (Loss) [Line Items]
Income before income taxes							(213,166)		(171,081)
Tax benefit							51,943		41,466
Net income							$ (161,223)		$ (129,615)

[1] *Years ended June 30, 2020 and 2019 amounts have been adjusted to reflect the change in inventory accounting method, as described in Notes 1 and 7 to the Consolidated Financial Statements.

[2] *The balances at June 30, 2018 and the year ended June 30, 2020 and 2019 amounts have been revised to reflect the change in inventory accounting method, as described in Notes 1 and 7 to the consolidated financial statements.

[3] *Years ended June 30, 2020 and 2019 amounts have been adjusted to reflect the change in inventory accounting method, as described in Notes 1 and 7 to the Consolidated Financial Statements.

[4] *Years ended June 30, 2020 and 2019 amounts have been adjusted to reflect the change in inventory accounting method, as described in Notes 1 and 7 to the Consolidated Financial Statements.