Equity - Changes in accumulated other comprehensive income (loss) in shareholders' equity by component (Details) - USD ($) $ in Thousands	6 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning balance	$ 6,128,529	$ 5,968,152
Ending balance	7,122,304	6,342,501
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 before reclassifications	347,233	48,874
Amounts reclassified from accumulated other comprehensive (loss)	0	0
Ending balance	(846,704)	(962,782)
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 before reclassifications	0	0
Amounts reclassified from accumulated other comprehensive (loss)	81,136	64,442
Ending balance	(1,283,802)	(982,950)
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 before reclassifications	347,233	48,874
Amounts reclassified from accumulated other comprehensive (loss)	81,136	64,442
Ending balance	$ (2,130,506)	$ (1,945,732)