Equity - Reclassifications out of accumulated other comprehensive income (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Mar. 31, 2019	Mar. 31, 2018	Mar. 31, 2019	Mar. 31, 2018
Accumulated Other Comprehensive Income (Loss) [Line Items]
Other (income), net	$ 17,500	$ 10,642	$ 37,638	$ 9,594
Tax benefit	(117,819)	(103,697)	(320,884)	(496,363)
Net income	411,381	366,130	1,099,193	707,987
Reclassification out of Accumulated Other Comprehensive Income (Loss) | Amortization of prior service cost and initial net obligation
Accumulated Other Comprehensive Income (Loss) [Line Items]
Other (income), net	(1,639)	(1,608)	(4,932)	(5,291)
Reclassification out of Accumulated Other Comprehensive Income (Loss) | Recognized actuarial loss
Accumulated Other Comprehensive Income (Loss) [Line Items]
Other (income), net	(29,763)	(35,606)	(89,756)	(110,566)
Reclassification out of Accumulated Other Comprehensive Income (Loss) | Retirement benefit plans
Accumulated Other Comprehensive Income (Loss) [Line Items]
Total before tax	(31,402)	(37,214)	(94,688)	(115,857)
Tax benefit	7,588	11,996	22,474	35,591
Net income	$ (23,814)	$ (25,218)	$ (72,214)	$ (80,266)