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v2.4.1.9

Debt and Credit Agreements (Details) (USD $) | Dec. 31, 2014 | Dec. 31, 2013 | Dec. 31, 2008
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Debt |  |  |
Debt | $ 1,752,000,000 us-gaap_LongTermDebt | $ 1,147,000,000 us-gaap_LongTermDebt |
Debt due in 2016 | 20,000,000 us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo |  |
Debt due in 2018 | 312,000,000 us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFour |  |
7.33% weighted-average fixed rate notes |  |  |
Debt |  |  |
Debt | 20,000,000 us-gaap_LongTermDebt / us-gaap_DebtInstrumentAxis = cog_SevenPointThreeThreePercentageWeightedAverageFixedRateNotesMember | 20,000,000 us-gaap_LongTermDebt / us-gaap_DebtInstrumentAxis = cog_SevenPointThreeThreePercentageWeightedAverageFixedRateNotesMember |
Weighted-average interest rate (as a percent) | 7.33%us-gaap_LongtermDebtWeightedAverageInterestRate / us-gaap_DebtInstrumentAxis = cog_SevenPointThreeThreePercentageWeightedAverageFixedRateNotesMember | 7.33%us-gaap_LongtermDebtWeightedAverageInterestRate / us-gaap_DebtInstrumentAxis = cog_SevenPointThreeThreePercentageWeightedAverageFixedRateNotesMember |
6.51% weighted-average fixed rate notes |  |  |
Debt |  |  |
Debt | 425,000,000 us-gaap_LongTermDebt / us-gaap_DebtInstrumentAxis = cog_SixPointFiveOnePercentageWeightedAverageFixedRateNotesMember | 425,000,000 us-gaap_LongTermDebt / us-gaap_DebtInstrumentAxis = cog_SixPointFiveOnePercentageWeightedAverageFixedRateNotesMember |
Weighted-average interest rate (as a percent) | 6.51%us-gaap_LongtermDebtWeightedAverageInterestRate / us-gaap_DebtInstrumentAxis = cog_SixPointFiveOnePercentageWeightedAverageFixedRateNotesMember | 6.51%us-gaap_LongtermDebtWeightedAverageInterestRate / us-gaap_DebtInstrumentAxis = cog_SixPointFiveOnePercentageWeightedAverageFixedRateNotesMember |
9.78% fixed rate notes |  |  |
Debt |  |  |
Debt | 67,000,000 us-gaap_LongTermDebt / us-gaap_DebtInstrumentAxis = cog_NinePointSevenEightPercentageNotesMember | 67,000,000 us-gaap_LongTermDebt / us-gaap_DebtInstrumentAxis = cog_NinePointSevenEightPercentageNotesMember |
Interest rate (as a percent) | 9.78%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_DebtInstrumentAxis = cog_NinePointSevenEightPercentageNotesMember | 9.78%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_DebtInstrumentAxis = cog_NinePointSevenEightPercentageNotesMember | 9.78%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_DebtInstrumentAxis = cog_NinePointSevenEightPercentageNotesMember
5.58% weighted-average fixed rate notes |  |  |
Debt |  |  |
Debt | 175,000,000 us-gaap_LongTermDebt / us-gaap_DebtInstrumentAxis = cog_FivePointFiveEightPercentageWeightedAverageFixedRateNotesMember | 175,000,000 us-gaap_LongTermDebt / us-gaap_DebtInstrumentAxis = cog_FivePointFiveEightPercentageWeightedAverageFixedRateNotesMember |
Weighted-average interest rate (as a percent) | 5.58%us-gaap_LongtermDebtWeightedAverageInterestRate / us-gaap_DebtInstrumentAxis = cog_FivePointFiveEightPercentageWeightedAverageFixedRateNotesMember | 5.58%us-gaap_LongtermDebtWeightedAverageInterestRate / us-gaap_DebtInstrumentAxis = cog_FivePointFiveEightPercentageWeightedAverageFixedRateNotesMember |
3.65% weighted-average fixed rate notes |  |  |
Debt |  |  |
Debt | 925,000,000 us-gaap_LongTermDebt / us-gaap_DebtInstrumentAxis = cog_ThreePointSixFivePercentageWeightedAverageFixedRateNotesMember | 0 us-gaap_LongTermDebt / us-gaap_DebtInstrumentAxis = cog_ThreePointSixFivePercentageWeightedAverageFixedRateNotesMember |
Revolving credit facility |  |  |
Debt |  |  |
Debt | $ 140,000,000 us-gaap_LongTermDebt / us-gaap_DebtInstrumentAxis = us-gaap_LineOfCreditMember | $ 460,000,000 us-gaap_LongTermDebt / us-gaap_DebtInstrumentAxis = us-gaap_LineOfCreditMember |
Weighted-average interest rate (as a percent) | 2.40%us-gaap_LongtermDebtWeightedAverageInterestRate / us-gaap_DebtInstrumentAxis = us-gaap_LineOfCreditMember | 2.00%us-gaap_LongtermDebtWeightedAverageInterestRate / us-gaap_DebtInstrumentAxis = us-gaap_LineOfCreditMember |

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- Definition Contractual interest rate for funds borrowed, under the debt agreement. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 22 -Article 5 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.22(a)(1)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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- Definition Carrying amount of long-term debt, net of unamortized discount or premium, including current and noncurrent amounts. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 16 -Article 7 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.22) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03.16) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 16 -Article 9 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 20, 22 -Article 5 Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03.16) -URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910 + Details
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- Definition Amount of long-term debt payable, sinking fund requirements, and other securities issued that are redeemable by holder at fixed or determinable prices and dates maturing in the fourth fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6802200&loc=d3e1835-112601 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 3 -Subparagraph (SX 210.12-04.(a)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e24072-122690 + Details
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- Definition Amount of long-term debt payable, sinking fund requirements, and other securities issued that are redeemable by holder at fixed or determinable prices and dates maturing in the second fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6802200&loc=d3e1835-112601 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 3 -Subparagraph (SX 210.12-04.(a)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e24072-122690 + Details
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