Equity - Reclassifications out of accumulated other comprehensive income (Details) - USD ($) $ in Thousands	3 Months Ended
	Sep. 30, 2018	Sep. 30, 2017
Accumulated Other Comprehensive Income (Loss) [Line Items]
Other expense (income), net	$ 13,913	$ (16,516)
Tax benefit	(83,824)	(88,767)
Net income	375,899	285,535
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 expense (income), net	(1,641)	(2,133)
Reclassification out of Accumulated Other Comprehensive Income (Loss) | Recognized actuarial loss
Accumulated Other Comprehensive Income (Loss) [Line Items]
Other expense (income), net	(29,297)	(39,036)
Reclassification out of Accumulated Other Comprehensive Income (Loss) | Retirement benefit plans
Accumulated Other Comprehensive Income (Loss) [Line Items]
Total before tax	(30,938)	(41,169)
Tax benefit	7,065	14,434
Net income	$ (23,873)	$ (26,735)