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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 MMcfe in Thousands | 12 Months Ended
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Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015
Extractive Industries [Abstract] |  |  |
Proved undeveloped reserves dropped | 668 | 269 | 1,200

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- Definition The number of Proved Undeveloped Reserves dropped in the current year due to the application of the five year rule. + References No definition available. + Details
Name: | rrc_ProvedUnDevelopedReservesDropped
Namespace Prefix: | rrc_
Data Type: | num:energyItemType
Balance Type: | na
Period Type: | duration

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- References No definition available. + Details
Name: | us-gaap_ExtractiveIndustriesAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration