Equity - Changes in accumulated other comprehensive income (loss) in shareholders' equity by component (Details) - USD ($) $ in Thousands	3 Months Ended
	Sep. 30, 2020	Sep. 30, 2019
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning balance	$ 6,128,529	$ 5,968,152
Ending balance	6,544,249	6,102,792
Foreign Currency Translation Adjustment
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning balance	(1,193,937)	(1,011,656)
Other comprehensive income (loss) before reclassifications	130,251	(102,572)
Amounts reclassified from accumulated other comprehensive (loss)	0	0
Ending balance	(1,063,686)	(1,114,228)
Retirement Benefit Plans
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning balance	(1,364,938)	(1,047,392)
Other comprehensive income (loss) before reclassifications	0	0
Amounts reclassified from accumulated other comprehensive (loss)	40,152	31,026
Ending balance	(1,324,786)	(1,016,366)
Accumulated Other Comprehensive (Loss)
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning balance	(2,558,875)	(2,059,048)
Other comprehensive income (loss) before reclassifications	130,251	(102,572)
Amounts reclassified from accumulated other comprehensive (loss)	40,152	31,026
Ending balance	$ (2,388,472)	$ (2,130,594)