Summary of Significant Accounting Policies - Income Taxes (Details) $ in Millions	12 Months Ended
Dec. 31, 2022 USD ($)
Summary of Significant Accounting Policies
Reduction of deferred tax liability due to change in the enacted tax rate, net of the change in the Company's state apportionment	$ (41)

Amount of increase (decrease) in deferred tax liability attributable to taxable differences due to change in tax rate, net of the Company's state apportionment during the period.

No definition available.

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