Equity - Reclassifications out of accumulated other comprehensive income (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Mar. 31, 2020	Mar. 31, 2019	Mar. 31, 2020	Mar. 31, 2019
Accumulated Other Comprehensive Income (Loss) [Line Items]
Other (income), net	$ 12,643	$ 17,500	$ 73,713	$ 37,638
Tax benefit	(86,788)	(117,819)	(231,051)	(320,884)
Net income	367,369	411,381	911,008	1,099,193
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	(1,385)	(1,639)	(4,152)	(4,932)
Reclassification out of Accumulated Other Comprehensive Income (Loss) | Recognized actuarial loss
Accumulated Other Comprehensive Income (Loss) [Line Items]
Other (income), net	(41,154)	(29,763)	(123,342)	(89,756)
Reclassification out of Accumulated Other Comprehensive Income (Loss) | Retirement benefit plans
Accumulated Other Comprehensive Income (Loss) [Line Items]
Total before tax	(42,539)	(31,402)	(127,494)	(94,688)
Tax benefit	10,414	7,588	30,927	22,474
Net income	$ (32,125)	$ (23,814)	$ (96,567)	$ (72,214)