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v2.4.1.9

LONG-TERM DEBT (Narrative) (Details) (USD $) | 3 Months Ended | 9 Months Ended | 3 Months Ended
--- | --- | --- | ---
Aug. 24, 2014 | Feb. 22, 2015 | Feb. 23, 2014 | Feb. 23, 2014 | Nov. 28, 2010 | Feb. 22, 2015 | Nov. 24, 2013
Debt Instrument [Line Items] |  |  |  |  |  |  |
Repayments of Long-term Debt |  | $ 1,492,900,000 us-gaap_RepaymentsOfLongTermDebt | $ 71,200,000 us-gaap_RepaymentsOfLongTermDebt |  |  |  |
Debt Instrument, Interest Rate, Stated Percentage |  | 3.25%us-gaap_DebtInstrumentInterestRateStatedPercentage |  |  |  | 3.25%us-gaap_DebtInstrumentInterestRateStatedPercentage |
Terminated forward starting swap payable |  | 0 cag_ProceedsFromTerminationOfInterestRateSwapContract | 54,900,000 cag_ProceedsFromTerminationOfInterestRateSwapContract |  |  |  |
Gains (Losses) on Extinguishment of Debt | (16,300,000)us-gaap_GainsLossesOnExtinguishmentOfDebt |  |  |  |  |  |
2010 Interest Rate Swap |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Reduction of net interest expense due to impact of interest rate swap contracts |  |  | 7,100,000 cag_ReductionOfNetInterestExpenseDueToImpactOfInterestRateSwapContracts / us-gaap_DerivativeInstrumentRiskAxis = cag_A2010InterestRateSwapMember | 2,400,000 cag_ReductionOfNetInterestExpenseDueToImpactOfInterestRateSwapContracts / us-gaap_DerivativeInstrumentRiskAxis = cag_A2010InterestRateSwapMember |  |  |
Terminated forward starting swap payable |  |  |  |  | 28,200,000 cag_ProceedsFromTerminationOfInterestRateSwapContract / us-gaap_DerivativeInstrumentRiskAxis = cag_A2010InterestRateSwapMember |  |
2014 Interest Rate Swap |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Reduction of net interest expense due to impact of interest rate swap contracts |  | 7,100,000 cag_ReductionOfNetInterestExpenseDueToImpactOfInterestRateSwapContracts / us-gaap_DerivativeInstrumentRiskAxis = cag_A2014InterestRateSwapMember | 700,000 cag_ReductionOfNetInterestExpenseDueToImpactOfInterestRateSwapContracts / us-gaap_DerivativeInstrumentRiskAxis = cag_A2014InterestRateSwapMember |  |  | 1,900,000 cag_ReductionOfNetInterestExpenseDueToImpactOfInterestRateSwapContracts / us-gaap_DerivativeInstrumentRiskAxis = cag_A2014InterestRateSwapMember |
Interest rate contracts |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Reduction of net interest expense due to impact of interest rate swap contracts |  |  |  |  |  | 200,000 cag_ReductionOfNetInterestExpenseDueToImpactOfInterestRateSwapContracts / us-gaap_DerivativeInstrumentRiskAxis = us-gaap_InterestRateSwapMember |
Cumulative adjustment to the fair value of the debt instruments that were hedged |  |  |  |  |  | 12,600,000 us-gaap_DerivativeInstrumentsLossRecognizedInOtherComprehensiveIncomeEffectivePortion / us-gaap_DerivativeInstrumentRiskAxis = us-gaap_InterestRateSwapMember |
Floating Rate Notes 0.37% |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Other Notes Payable | 550,000,000 us-gaap_NotesPayable / us-gaap_DebtInstrumentAxis = cag_FloatingRateNotesPointThirtySevenPercentMember |  |  |  |  |  |
Senior Notes | 2023 Maturity |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Repayments of Long-term Debt | 225,000,000 us-gaap_RepaymentsOfLongTermDebt / us-gaap_DebtInstrumentAxis = cag_A2023MaturityMember / us-gaap_LongtermDebtTypeAxis = us-gaap_SeniorNotesMember |  |  |  |  |  |
Senior Notes | 2043 Maturity |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Repayments of Long-term Debt | 200,000,000 us-gaap_RepaymentsOfLongTermDebt / us-gaap_DebtInstrumentAxis = cag_A2043MaturityMember / us-gaap_LongtermDebtTypeAxis = us-gaap_SeniorNotesMember |  |  | 20,000,000 us-gaap_RepaymentsOfLongTermDebt / us-gaap_DebtInstrumentAxis = cag_A2043MaturityMember / us-gaap_LongtermDebtTypeAxis = us-gaap_SeniorNotesMember |  |  | 43,000,000 us-gaap_RepaymentsOfLongTermDebt / us-gaap_DebtInstrumentAxis = cag_A2043MaturityMember / us-gaap_LongtermDebtTypeAxis = us-gaap_SeniorNotesMember
Debt Instrument, Interest Rate, Stated Percentage |  |  | 4.65%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_DebtInstrumentAxis = cag_A2043MaturityMember / us-gaap_LongtermDebtTypeAxis = us-gaap_SeniorNotesMember | 4.65%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_DebtInstrumentAxis = cag_A2043MaturityMember / us-gaap_LongtermDebtTypeAxis = us-gaap_SeniorNotesMember |  |  |
Gains (Losses) on Extinguishment of Debt |  |  |  | 1,300,000 us-gaap_GainsLossesOnExtinguishmentOfDebt / us-gaap_DebtInstrumentAxis = cag_A2043MaturityMember / us-gaap_LongtermDebtTypeAxis = us-gaap_SeniorNotesMember |  |  | 2,400,000 us-gaap_GainsLossesOnExtinguishmentOfDebt / us-gaap_DebtInstrumentAxis = cag_A2043MaturityMember / us-gaap_LongtermDebtTypeAxis = us-gaap_SeniorNotesMember
Senior Notes | 2019 Maturity |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Repayments of Long-term Debt | 25,000,000 us-gaap_RepaymentsOfLongTermDebt / us-gaap_DebtInstrumentAxis = cag_A2019MaturityMember / us-gaap_LongtermDebtTypeAxis = us-gaap_SeniorNotesMember |  |  |  |  |  |
Senior Notes | 2018 Maturity |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Repayments of Long-term Debt | 25,000,000 us-gaap_RepaymentsOfLongTermDebt / us-gaap_DebtInstrumentAxis = cag_A2018MaturityMember / us-gaap_LongtermDebtTypeAxis = us-gaap_SeniorNotesMember |  |  |  |  |  |
Senior Notes | 2017 Maturity |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Repayments of Long-term Debt | 25,000,000 us-gaap_RepaymentsOfLongTermDebt / us-gaap_DebtInstrumentAxis = cag_A2017MaturityMember / us-gaap_LongtermDebtTypeAxis = us-gaap_SeniorNotesMember |  |  |  |  |  |
LIBOR plus 1.75% term loans |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Repayments of Long-term Debt | 900,000,000 us-gaap_RepaymentsOfLongTermDebt / us-gaap_LongtermDebtTypeAxis = cag_DebtInstrumentBasisSpreadOnVariableRateMember |  |  |  |  |  |
Gains (Losses) on Extinguishment of Debt | (8,300,000)us-gaap_GainsLossesOnExtinguishmentOfDebt / us-gaap_LongtermDebtTypeAxis = cag_DebtInstrumentBasisSpreadOnVariableRateMember |  |  |  |  |  |
Tender Premium |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Gains (Losses) on Extinguishment of Debt | (9,500,000)us-gaap_GainsLossesOnExtinguishmentOfDebt / us-gaap_ExtinguishmentOfDebtAxis = cag_TenderPremiumMember |  |  |  |  |  |
LIBOR | Floating Rate Notes 0.37% |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Floating rate notes percentage rate | 0.37%us-gaap_LongTermDebtPercentageBearingVariableInterestRate / us-gaap_DebtInstrumentAxis = cag_FloatingRateNotesPointThirtySevenPercentMember / us-gaap_VariableRateAxis = us-gaap_LondonInterbankOfferedRateLIBORMember |  |  |  |  |  |
LIBOR | LIBOR plus 1.75% term loans |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Debt Instrument, Interest Rate, Stated Percentage | 1.75%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_LongtermDebtTypeAxis = cag_DebtInstrumentBasisSpreadOnVariableRateMember / us-gaap_VariableRateAxis = us-gaap_LondonInterbankOfferedRateLIBORMember |  |  |  |  |  |
Revolving Credit Facility |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Maximum borrowing capacity |  | $ 1,500,000,000.0 us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity / us-gaap_CreditFacilityAxis = us-gaap_RevolvingCreditFacilityMember |  |  |  | $ 1,500,000,000.0 us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity / us-gaap_CreditFacilityAxis = us-gaap_RevolvingCreditFacilityMember |

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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 The effective portion of losses on derivative instruments designated and qualifying as hedging instruments that was recognized in other comprehensive income during the current period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 10A -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=36458714&loc=SL7669646-108580 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4C -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=35706170&loc=SL5624171-113959 + Details
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- Definition The interest rate applicable to the portion of the carrying amount of long-term borrowings outstanding as of the balance sheet date, including current maturities, which accrues interest at a rate subject to change from time to time. + 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
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