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Supplemental Information on Natural Gas and Oil Exploration, Development and Production Activities (Unaudited) - Changes in Proved Undeveloped Reserves (Parenthetical) (Detail) MMcfe in Thousands	12 Months Ended
	Dec. 31, 2020 MMcfe
Extractive Industries [Abstract]
Proved undeveloped reserves removed and deferred	961

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- Definition

Proved undeveloped reserves removed and deferred.

+ References

No definition available.

+ Details

Name:	rrc_ProvedUnDevelopedReservesRemovedAndDeferred
Namespace Prefix:	rrc_
Data Type:	num:energyItemType
Balance Type:	na
Period Type:	duration

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- References

No definition available.

+ Details

Name:	srt_ExtractiveIndustriesAbstract
Namespace Prefix:	srt_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration