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Commitments and Contingencies (Details 2) (Shelby County, Texas, USD $) In Millions, unless otherwise specified | 1 Months Ended
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Oct. 31, 2010
Shelby County, Texas |
Environmental Matters |
Amount of actual damages sought | $ 10.0 us-gaap_LossContingencyDamagesSoughtValue / us-gaap_EnvironmentalRemediationSiteAxis = cog_ShelbyCountyTexasMember
Ratio of exemplary damages to actual damages sought | 2.5 cog_RatioOfExemplaryDamagesToActualDamagesSought / us-gaap_EnvironmentalRemediationSiteAxis = cog_ShelbyCountyTexasMember

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- Definition The value (monetary amount) of the award the plaintiff seeks in the legal matter. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 450 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=25496072&loc=d3e14326-108349 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 450 -SubTopic 20 -Section 50 -Paragraph 4 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=25496072&loc=d3e14435-108349 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 450 -SubTopic 20 -Section 50 -Paragraph 9 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=25496072&loc=d3e14557-108349 + Details
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