Summary of Significant Accounting Policies - Income Taxes (Details) $ in Millions	3 Months Ended
Sep. 30, 2022 USD ($)
Summary of Significant Accounting Policies
Reduction of net deferred income tax liability	$ 21

Amount of increase (decrease) in deferred tax liability attributable to taxable differences due to change in tax rate.

No definition available.

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Namespace Prefix:	ar_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration