Equity - Significant reclassifications out of accumulated other comprehensive (loss) in shareholders' equity (Details) - USD ($) $ in Thousands	12 Months Ended
Jun. 30, 2019	Jun. 30, 2018
Accumulated Other Comprehensive Income (Loss) [Line Items]
Net of tax	$ (101,008)	$ (94,842)
Amortization of prior service cost and initial net obligation
Accumulated Other Comprehensive Income (Loss) [Line Items]
Reclassification from accumulated other comprehensive (loss)	(6,552)	(6,467)
Recognized actuarial loss
Accumulated Other Comprehensive Income (Loss) [Line Items]
Reclassification from accumulated other comprehensive (loss)	(121,534)	(147,611)
Retirement benefit plans
Accumulated Other Comprehensive Income (Loss) [Line Items]
Reclassification from accumulated other comprehensive (loss)	(128,086)	(154,078)
Tax benefit	30,656	51,242
Net of tax	$ (97,430)	$ (102,836)

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Amount before tax of reclassification adjustments of other comprehensive income (loss).

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Amount after tax of reclassification adjustments of other comprehensive income (loss).

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