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Supplemental Information on Natural Gas and Oil Exploration, Development and Production Activities (Unaudited) - Changes in Proved Undeveloped Reserves for 2013 (Mmcfe) (Detail) | 12 Months Ended
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Dec. 31, 2014 MMcfe
Extractive Industries [Abstract] |  |
Beginning proved undeveloped reserves at December 31, 2013 | 4,009,608 us-gaap_ProvedUndevelopedReserveBOE1 |
Undeveloped reserves transferred to developed | (620,167)rrc_ProvedUndevelopedReservesTransferredToDeveloped |
Revisions | (147,019)rrc_ProvedUndevelopedReservesRevisionsOfPreviousEstimatesIncreaseDecrease | [1]
Purchases/ (sales) | (58,045)rrc_ProvedUndevelopedReservesPurchasesAndSales |
Extension and discoveries | 1,776,091 rrc_ProvedUndevelopedReservesExtensionsDiscoveriesAndAdditions |
Ending proved undeveloped reserves at December 31, 2014 | 4,960,468 us-gaap_ProvedUndevelopedReserveBOE1 |
[1] | Includes 611,341 Mmcfe of proved undeveloped reserves dropped due to the five year rule.

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- Definition Volumetric amount of increase (decrease) as a result of extensions, discoveries and improved recovery of proved oil and gas reserves. + References No definition available. + Details
Name: | rrc_ProvedUndevelopedReservesExtensionsDiscoveriesAndAdditions
Namespace Prefix: | rrc_
Data Type: | num:energyItemType
Balance Type: | na
Period Type: | duration

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- Definition Proved undeveloped reserves purchases and sales. + References No definition available. + Details
Name: | rrc_ProvedUndevelopedReservesPurchasesAndSales
Namespace Prefix: | rrc_
Data Type: | num:energyItemType
Balance Type: | na
Period Type: | duration

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- Definition Amount of increase (decrease) in proved undeveloped reserves as a result of revisions of estimated quantity. + References No definition available. + Details
Name: | rrc_ProvedUndevelopedReservesRevisionsOfPreviousEstimatesIncreaseDecrease
Namespace Prefix: | rrc_
Data Type: | num:energyItemType
Balance Type: | na
Period Type: | duration

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- Definition Net quantities of an enterprise's interests in proved undeveloped reserves of either crude oil (including condensate and natural gas liquids), natural gas, synthetic oil and gas, or other renewable natural resource that transferred to proved developed reserves by the end of the period. + References No definition available. + Details
Name: | rrc_ProvedUndevelopedReservesTransferredToDeveloped
Namespace Prefix: | rrc_
Data Type: | num:energyItemType
Balance Type: | na
Period Type: | duration

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- Details
Name: | us-gaap_ExtractiveIndustriesAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Definition Energy measure of proved undeveloped reserves of crude oil, including condensate and natural gas liquids, natural gas, synthetic oil and gas, or other nonrenewable natural resource that is intended to be upgraded into synthetic oil and gas. + References No definition available. + Details
Name: | us-gaap_ProvedUndevelopedReserveBOE1
Namespace Prefix: | us-gaap_
Data Type: | num:energyItemType
Balance Type: | na
Period Type: | instant