Contingencies (Details) $ in Millions, $ in Millions	3 Months Ended	6 Months Ended
	Sep. 30, 2021 AUD ($)	Jun. 30, 2021 USD ($)
Guarantor Obligations [Line Items]
Deferred Tax Liability Not Recognized, Events that Would Cause Temporary Difference to be Taxable, Undistributed Earnings of Foreign Subsidiaries		As a result of an audit by the Internal Revenue Service (“IRS”) for fiscal years 2013 through 2015, on June 30, 2021, we received a draft notice of proposed adjustment from the IRS for the 2014 fiscal year relating to a series of reorganizations we undertook during that year in connection with the business realignment of our corporate and management reporting structure along brand lines. The IRS asserts that these reorganizations involved taxable distributions of approximately $5.9 billion. We anticipate that we will soon receive a final notice of proposed adjustment and draft Revenue Agent’s Report (“RAR”) and, thereafter, a final RAR. The amount of additional tax that may be asserted by the IRS in the final RAR cannot be quantified at this time; however, based on the draft notice received, the amount of additional tax to be proposed is likely to be material. We disagree with the IRS’s position as asserted in the draft notice of proposed adjustment and intend to contest it vigorously by filing a protest disputing on multiple grounds any proposed taxes and proceeding to the IRS Office of Appeals.The final resolution of this matter is uncertain, but the Company believes that it is more likely than not the Company’s tax position will be sustained; therefore no reserve is recorded with respect to this matter. An unfavorable resolution of this matter could have a material, adverse impact on our consolidated Financial Statements in future periods.
Dragontail Acquisition | Subsequent Event
Guarantor Obligations [Line Items]
Asset Acquisition, Price of Acquisition, Expected	$ 93.5
Property Lease Guarantee [Member]
Guarantor Obligations [Line Items]
Year longest lease expires		2065
Guarantor Obligations, Maximum Exposure		$ 400
Guarantee Obligations Maximum Exposure At Present Value		$ 350