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Income Taxes (Narrative) (Details) - USD ($) $ / shares in Units, $ in Thousands	1 Months Ended			12 Months Ended
	Jun. 30, 2018	Apr. 30, 2018	Mar. 31, 2018	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2018
Income Taxes [Line Items]
Additional income tax benefits as an increase to earnings				$ 39,534	$ 26,658	$ 17,078
Income taxes paid				180,359	242,860	170,653
Income taxes payable				64,755	73,248
Income tax expense from transition tax				$ 124,602	$ 127,540	$ 68,858
Payable period of additional tax expense				8 years
U.S. Federal income tax rate				21.00%	21.00%	28.00%
Increase to net earnings from tax holidays and tax incentives program				$ 43,800	$ 20,300
Increase to net earnings per diluted share from tax holidays and tax incentives program				$ 0.30	$ 0.14
Additional tax expense					$ 6,038	$ 126,753
Undistributed earnings				$ 3,000,000
Tax cuts and jobs act, income tax expense (benefit)						138,000
Transition tax					$ 6,000
Extraordinary Dispositions [Member]
Income Taxes [Line Items]
Amount of deferred taxes that would have been recognized if the earnings has not been permanently reinvested				$ 194,400
Tax Year 2018 [Member] | Scenario, Plan [Member]
Income Taxes [Line Items]
Additional income tax expense from adjustment of deferred tax assets						11,100
Transition tax						126,900
Australian Taxation Office [Member]
Income Taxes [Line Items]
Percentage of penalties on additional income tax	50.00%
Tax liabilities related to assessments	$ 75,900	$ 75,900	$ 151,700
Income taxes paid		$ 75,900
Interest related to assessments			38,400
Income taxes payable	$ 75,900		$ 151,700			75,900
Percentage of recognized tax benefit for uncertain tax position				50.00%
Australian Taxation Office [Member] | Minimum [Member]
Income Taxes [Line Items]
Tax year under audit					2009
Australian Taxation Office [Member] | Maximum [Member]
Income Taxes [Line Items]
Tax year under audit					2013
Domestic Tax Authority [Member]
Income Taxes [Line Items]
Operating loss carryforwards				$ 30,400
Amount of deferred taxes that would have been recognized if the earnings has not been permanently reinvested				5,200
Tax cuts and jobs act, income tax expense (benefit)						$ 138,000
Foreign Tax Authority [Member]
Income Taxes [Line Items]
Operating loss carryforwards				6,800
Tax cuts and jobs act, income tax expense (benefit)				6,000	$ 126,900
Valuation Allowance | Foreign Tax Authority [Member]
Income Taxes [Line Items]
Operating loss carryforwards				1,600
Capital loss				$ 15,300

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