Retirement Benefits - Summary of defined benefit pension plans (Details) - USD ($) $ in Thousands	12 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2020
Change in plan assets
Fair value of plan assets at beginning of year	$ 5,305,577
Fair value of plan assets at end of year	4,362,153	$ 5,305,577
Amounts recognized on the Consolidated Balance Sheet
Pensions and other postretirement benefits	(639,939)	(1,055,638)
Pension Plan
Change in benefit obligation
Benefit obligation at beginning of year	6,323,003	6,405,623
Service cost	76,638	84,188	$ 82,743
Interest cost	110,250	102,475	142,479
Plan amendments	(5,691)	2,311
Actuarial gain	(1,097,053)	(91,719)
Benefits paid	(256,868)	(264,062)
Foreign currency translation and other	(190,960)	84,187
Benefit obligation at end of year	4,959,319	6,323,003	6,405,623
Change in plan assets
Fair value of plan assets at beginning of year	5,305,577	4,594,106
Actual (loss) gain on plan assets	(605,642)	831,762
Employer contributions	96,717	76,936
Benefits paid	(256,868)	(264,062)
Foreign currency translation and other	(177,631)	66,835
Fair value of plan assets at end of year	4,362,153	5,305,577	$ 4,594,106
Funded status	(597,166)	(1,017,426)
Amounts recognized on the Consolidated Balance Sheet
Other accrued liabilities	(19,307)	(4,944)
Pensions and other postretirement benefits	(577,859)	(1,012,482)
Net amount recognized	(597,166)	(1,017,426)
Amounts recognized in Accumulated Other Comprehensive (Loss)
Net actuarial loss	672,775	1,090,343
Prior service cost	4,901	15,006
Transition obligation	0	8
Net amount recognized	$ 677,676	$ 1,105,357