Equity - Changes in accumulated other comprehensive income (loss) in shareholders' equity by component (Details) - USD ($) $ in Thousands	6 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Jul. 01, 2018	Jun. 30, 2018
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning balance	$ 5,968,152	$ 5,865,493
Impact of adoption of ASU 2016-01				$ (251)
Ending balance	6,342,501	5,821,166
Foreign Currency Translation Adjustment and Other
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning balance	(1,011,656)	(943,477)
Impact of adoption of ASU 2016-01			$ (1,734)
Other comprehensive (loss) before reclassifications	48,874	(82,655)
Amounts reclassified from accumulated other comprehensive (loss)	0	3,578
Ending balance	(962,782)	(1,024,288)
Retirement Benefit Plans
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning balance	(1,047,392)	(819,609)
Impact of adoption of ASU 2016-01			0
Other comprehensive (loss) before reclassifications	0	0
Amounts reclassified from accumulated other comprehensive (loss)	64,442	48,400
Ending balance	(982,950)	(771,209)
Accumulated Other Comprehensive (Loss)
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning balance	(2,059,048)	(1,763,086)
Impact of adoption of ASU 2016-01			$ (1,734)	$ (1,734)
Other comprehensive (loss) before reclassifications	48,874	(82,655)
Amounts reclassified from accumulated other comprehensive (loss)	64,442	51,978
Ending balance	$ (1,945,732)	$ (1,795,497)