Equity - Changes in accumulated other comprehensive (loss) (Details) - USD ($) $ in Thousands	12 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2018
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accounting Standards Update [Extensible List]			us-gaap:AccountingStandardsUpdate201601Member
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning balance	$ 5,968,152	$ 5,865,493	$ 5,267,346
Ending balance	6,128,529	5,968,152	5,865,493
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)
Other comprehensive (loss) before reclassifications	(182,281)	(70,023)
Amounts reclassified from accumulated other comprehensive (loss)	0	3,578
Ending balance	(1,193,937)	(1,011,656)	(943,477)
Retirement Benefit Plans
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning balance	(1,047,392)	(819,609)
Other comprehensive (loss) before reclassifications	(447,161)	(325,213)
Amounts reclassified from accumulated other comprehensive (loss)	129,615	97,430
Ending balance	(1,364,938)	(1,047,392)	(819,609)
AOCI Attributable to Parent
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning balance	(2,059,048)	(1,763,086)	(1,924,204)
Other comprehensive (loss) before reclassifications	(629,442)	(395,236)
Amounts reclassified from accumulated other comprehensive (loss)	129,615	101,008
Ending balance	$ (2,558,875)	(2,059,048)	(1,763,086)
Cumulative Effect, Period of Adoption, Adjustment
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning balance		49,869
Ending balance			49,869
Cumulative Effect, Period of Adoption, Adjustment | Foreign Currency Translation Adjustment and Other
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning balance		(1,734)
Ending balance			(1,734)
Cumulative Effect, Period of Adoption, Adjustment | Retirement Benefit Plans
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning balance		0
Ending balance			0
Cumulative Effect, Period of Adoption, Adjustment | AOCI Attributable to Parent
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning balance		$ (1,734)
Ending balance			$ (1,734)