XML 70 R55.htm IDEA: XBRL DOCUMENT
v3.8.0.1

Debt and Credit Agreements - Schedule of Notes Issued (Details) - Senior Notes - USD ($) | 1 Months Ended
--- | ---
Sep. 30, 2014 | Dec. 31, 2010 | Jul. 31, 2008
6.51% weighted-average senior notes |  |  |
Debt Instrument [Line Items] |  |  |
Principal |  |  | $ 425,000,000
6.51% weighted-average senior notes | Tranche 1 |  |  |
Debt Instrument [Line Items] |  |  |
Principal |  |  | $ 245,000,000
Term |  |  | 10 years
Coupon (as a percent) |  |  | 6.44%
6.51% weighted-average senior notes | Tranche 2 |  |  |
Debt Instrument [Line Items] |  |  |
Principal |  |  | $ 100,000,000
Term |  |  | 12 years
Coupon (as a percent) |  |  | 6.54%
6.51% weighted-average senior notes | Tranche 3 |  |  |
Debt Instrument [Line Items] |  |  |
Principal |  |  | $ 80,000,000
Term |  |  | 15 years
Coupon (as a percent) |  |  | 6.69%
5.58% weighted-average senior notes |  |  |
Debt Instrument [Line Items] |  |  |
Principal |  | $ 175,000,000 |
5.58% weighted-average senior notes | Tranche 1 |  |  |
Debt Instrument [Line Items] |  |  |
Principal |  | $ 88,000,000 |
Term |  | 10 years |
Coupon (as a percent) |  | 5.42% |
5.58% weighted-average senior notes | Tranche 2 |  |  |
Debt Instrument [Line Items] |  |  |
Principal |  | $ 25,000,000 |
Term |  | 12 years |
Coupon (as a percent) |  | 5.59% |
5.58% weighted-average senior notes | Tranche 3 |  |  |
Debt Instrument [Line Items] |  |  |
Principal |  | $ 62,000,000 |
Term |  | 15 years |
Coupon (as a percent) |  | 5.80% |
3.65% weighted-average senior notes |  |  |
Debt Instrument [Line Items] |  |  |
Principal | $ 925,000,000 |  |
3.65% weighted-average senior notes | Tranche 1 |  |  |
Debt Instrument [Line Items] |  |  |
Principal | $ 100,000,000 |  |
Term | 7 years |  |
Coupon (as a percent) | 3.24% |  |
3.65% weighted-average senior notes | Tranche 2 |  |  |
Debt Instrument [Line Items] |  |  |
Principal | $ 575,000,000 |  |
Term | 10 years |  |
Coupon (as a percent) | 3.67% |  |
3.65% weighted-average senior notes | Tranche 3 |  |  |
Debt Instrument [Line Items] |  |  |
Principal | $ 250,000,000 |  |
Term | 12 years |  |
Coupon (as a percent) | 3.77% |  |

X
- Definition Face (par) amount of debt instrument at time of issuance. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 55 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=64930739&loc=d3e28878-108400 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=64930785&loc=d3e28551-108399 + Details
Name: | us-gaap_DebtInstrumentFaceAmount
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Contractual interest rate for funds borrowed, under the debt agreement. + References Reference 1: 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
Name: | us-gaap_DebtInstrumentInterestRateStatedPercentage
Namespace Prefix: | us-gaap_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
Name: | us-gaap_DebtInstrumentLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Period of time between issuance and maturity of debt instrument, in PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References No definition available. + Details
Name: | us-gaap_DebtInstrumentTerm
Namespace Prefix: | us-gaap_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_LongtermDebtTypeAxis=us-gaap_SeniorNotesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=cog_SixPointFiveOnePercentageWeightedAverageFixedRateNotesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentRedemptionPeriodAxis=us-gaap_DebtInstrumentRedemptionPeriodOneMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentRedemptionPeriodAxis=us-gaap_DebtInstrumentRedemptionPeriodTwoMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentRedemptionPeriodAxis=us-gaap_DebtInstrumentRedemptionPeriodThreeMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=cog_FivePointFiveEightPercentageWeightedAverageFixedRateNotesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=cog_ThreePointSixFivePercentageWeightedAverageFixedRateNotesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |