Equity - Accumulated Other Comprehensive Income (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2017	Dec. 31, 2016
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance	$ 5,530,659	$ 4,650,589	$ 5,267,346	$ 4,578,678
Amounts reclassified from accumulated other comprehensive (loss)	28,312	36,173	55,047	70,335
Ending balance	5,519,210	4,530,978	5,519,210	4,530,978
Foreign Currency Translation Adjustment and Other
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance			(925,342)	(844,121)
Other comprehensive income (loss) before reclassifications			101,429	(253,484)
Amounts reclassified from accumulated other comprehensive (loss)			0	(230)
Ending balance	(823,913)	(1,097,835)	(823,913)	(1,097,835)
Retirement Benefit Plans
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance			(998,862)	(1,383,644)
Other comprehensive income (loss) before reclassifications			0	0
Amounts reclassified from accumulated other comprehensive (loss)			55,047	70,335
Ending balance	(943,815)	(1,313,309)	(943,815)	(1,313,309)
Total
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance			(1,924,204)	(2,227,765)
Other comprehensive income (loss) before reclassifications			101,429	(253,484)
Amounts reclassified from accumulated other comprehensive (loss)			55,047	70,105
Ending balance	$ (1,767,728)	$ (2,411,144)	$ (1,767,728)	$ (2,411,144)