Annual report pursuant to Section 13 and 15(d)

Selected Quarterly Financial Information (Unaudited) (Details 1)

v2.4.1.9
Selected Quarterly Financial Information (Unaudited) (Details 1) (USD $)
In Millions, unless otherwise specified
3 Months Ended 12 Months Ended
Feb. 28, 2015
Nov. 30, 2014
Aug. 31, 2014
May 31, 2014
Feb. 28, 2014
Nov. 30, 2013
Aug. 31, 2013
May 31, 2013
Feb. 28, 2015
Feb. 28, 2014
Summary of unusual items, net of income tax effect                    
Product recall $ 7.6stz_InventoryRecallExpenseNetofIncomeTax $ (1.7)stz_InventoryRecallExpenseNetofIncomeTax $ (5.9)stz_InventoryRecallExpenseNetofIncomeTax $ 0stz_InventoryRecallExpenseNetofIncomeTax         $ 0stz_InventoryRecallExpenseNetofIncomeTax  
Amortization of favorable interim supply agreement (0.7)stz_AdjustmentForAmortizationNetofIncomeTax (6.1)stz_AdjustmentForAmortizationNetofIncomeTax (8.0)stz_AdjustmentForAmortizationNetofIncomeTax (5.4)stz_AdjustmentForAmortizationNetofIncomeTax (1.2)stz_AdjustmentForAmortizationNetofIncomeTax (1.6)stz_AdjustmentForAmortizationNetofIncomeTax (1.5)stz_AdjustmentForAmortizationNetofIncomeTax 0stz_AdjustmentForAmortizationNetofIncomeTax (20.2)stz_AdjustmentForAmortizationNetofIncomeTax (4.3)stz_AdjustmentForAmortizationNetofIncomeTax
Other cost of product sold 0stz_OtherCostOfProductSoldNetOfIncomeTax (0.1)stz_OtherCostOfProductSoldNetOfIncomeTax (1.6)stz_OtherCostOfProductSoldNetOfIncomeTax 0stz_OtherCostOfProductSoldNetOfIncomeTax         (1.7)stz_OtherCostOfProductSoldNetOfIncomeTax  
Transaction, integration and other acquisition-related costs (5.4)stz_BusinessCombinationAcquisitionRelatedCostsNetOfIncomeTax (5.4)stz_BusinessCombinationAcquisitionRelatedCostsNetOfIncomeTax (5.7)stz_BusinessCombinationAcquisitionRelatedCostsNetOfIncomeTax (2.9)stz_BusinessCombinationAcquisitionRelatedCostsNetOfIncomeTax (4.3)stz_BusinessCombinationAcquisitionRelatedCostsNetOfIncomeTax (5.8)stz_BusinessCombinationAcquisitionRelatedCostsNetOfIncomeTax (4.2)stz_BusinessCombinationAcquisitionRelatedCostsNetOfIncomeTax (17.2)stz_BusinessCombinationAcquisitionRelatedCostsNetOfIncomeTax (19.4)stz_BusinessCombinationAcquisitionRelatedCostsNetOfIncomeTax (31.5)stz_BusinessCombinationAcquisitionRelatedCostsNetOfIncomeTax
Other selling, general and administrative expenses 8.6stz_OtherSellingGeneralAndAdministrativeExpenseNetOfIncomeTax 0stz_OtherSellingGeneralAndAdministrativeExpenseNetOfIncomeTax 0stz_OtherSellingGeneralAndAdministrativeExpenseNetOfIncomeTax 0stz_OtherSellingGeneralAndAdministrativeExpenseNetOfIncomeTax 0stz_OtherSellingGeneralAndAdministrativeExpenseNetOfIncomeTax (0.1)stz_OtherSellingGeneralAndAdministrativeExpenseNetOfIncomeTax 0stz_OtherSellingGeneralAndAdministrativeExpenseNetOfIncomeTax 1.8stz_OtherSellingGeneralAndAdministrativeExpenseNetOfIncomeTax 8.6stz_OtherSellingGeneralAndAdministrativeExpenseNetOfIncomeTax 1.7stz_OtherSellingGeneralAndAdministrativeExpenseNetOfIncomeTax
Loss on write-off of financing costs 0stz_LossOnWriteOffOfFinancingCostsNetOfIncomeTax 0stz_LossOnWriteOffOfFinancingCostsNetOfIncomeTax (3.1)stz_LossOnWriteOffOfFinancingCostsNetOfIncomeTax 0stz_LossOnWriteOffOfFinancingCostsNetOfIncomeTax         (3.1)stz_LossOnWriteOffOfFinancingCostsNetOfIncomeTax  
Deferred compensation         0stz_QuantifyingMisstatementInCurrentYearFinancialStatementsAmountNetofIncomeTax 0stz_QuantifyingMisstatementInCurrentYearFinancialStatementsAmountNetofIncomeTax 0stz_QuantifyingMisstatementInCurrentYearFinancialStatementsAmountNetofIncomeTax (4.4)stz_QuantifyingMisstatementInCurrentYearFinancialStatementsAmountNetofIncomeTax   (4.4)stz_QuantifyingMisstatementInCurrentYearFinancialStatementsAmountNetofIncomeTax
Impairment of goodwill and intangible assets         0stz_GoodwillAndIntangibleAssetImpairmentNetofIncomeTax 1.3stz_GoodwillAndIntangibleAssetImpairmentNetofIncomeTax (296.4)stz_GoodwillAndIntangibleAssetImpairmentNetofIncomeTax 0stz_GoodwillAndIntangibleAssetImpairmentNetofIncomeTax   (295.1)stz_GoodwillAndIntangibleAssetImpairmentNetofIncomeTax
Gain on remeasurement to fair value of equity method investment         0stz_BusinessCombinationStepAcquisitionEquityInterestInAcquireeRemeasurementGainNetofIncomeTax 0stz_BusinessCombinationStepAcquisitionEquityInterestInAcquireeRemeasurementGainNetofIncomeTax 1,642.0stz_BusinessCombinationStepAcquisitionEquityInterestInAcquireeRemeasurementGainNetofIncomeTax 0stz_BusinessCombinationStepAcquisitionEquityInterestInAcquireeRemeasurementGainNetofIncomeTax   1,642.0stz_BusinessCombinationStepAcquisitionEquityInterestInAcquireeRemeasurementGainNetofIncomeTax
Other equity method investment costs         0stz_OtherEquityMethodInvestmentCostsNetOfIncomeTax 0stz_OtherEquityMethodInvestmentCostsNetOfIncomeTax 0stz_OtherEquityMethodInvestmentCostsNetOfIncomeTax (0.1)stz_OtherEquityMethodInvestmentCostsNetOfIncomeTax   (0.1)stz_OtherEquityMethodInvestmentCostsNetOfIncomeTax
Commodity derivative contracts [Member]                    
Summary of unusual items, net of income tax effect                    
Net (gain) loss on undesignated commodity derivative contracts (5.4)stz_DerivativeInstrumentsNotDesignatedasHedgingInstruments.GainLossNetNetofIncomeTax
/ us-gaap_DerivativeInstrumentRiskAxis
= us-gaap_CommodityContractMember
(13.6)stz_DerivativeInstrumentsNotDesignatedasHedgingInstruments.GainLossNetNetofIncomeTax
/ us-gaap_DerivativeInstrumentRiskAxis
= us-gaap_CommodityContractMember
(1.8)stz_DerivativeInstrumentsNotDesignatedasHedgingInstruments.GainLossNetNetofIncomeTax
/ us-gaap_DerivativeInstrumentRiskAxis
= us-gaap_CommodityContractMember
0.1stz_DerivativeInstrumentsNotDesignatedasHedgingInstruments.GainLossNetNetofIncomeTax
/ us-gaap_DerivativeInstrumentRiskAxis
= us-gaap_CommodityContractMember
1.0stz_DerivativeInstrumentsNotDesignatedasHedgingInstruments.GainLossNetNetofIncomeTax
/ us-gaap_DerivativeInstrumentRiskAxis
= us-gaap_CommodityContractMember
0stz_DerivativeInstrumentsNotDesignatedasHedgingInstruments.GainLossNetNetofIncomeTax
/ us-gaap_DerivativeInstrumentRiskAxis
= us-gaap_CommodityContractMember
0stz_DerivativeInstrumentsNotDesignatedasHedgingInstruments.GainLossNetNetofIncomeTax
/ us-gaap_DerivativeInstrumentRiskAxis
= us-gaap_CommodityContractMember
0stz_DerivativeInstrumentsNotDesignatedasHedgingInstruments.GainLossNetNetofIncomeTax
/ us-gaap_DerivativeInstrumentRiskAxis
= us-gaap_CommodityContractMember
(20.7)stz_DerivativeInstrumentsNotDesignatedasHedgingInstruments.GainLossNetNetofIncomeTax
/ us-gaap_DerivativeInstrumentRiskAxis
= us-gaap_CommodityContractMember
1.0stz_DerivativeInstrumentsNotDesignatedasHedgingInstruments.GainLossNetNetofIncomeTax
/ us-gaap_DerivativeInstrumentRiskAxis
= us-gaap_CommodityContractMember
Settlements of undesignated commodity derivative contracts $ 2.4stz_SettlementsofUndesignatedCommoditySwapContractsNetofIncomeTax
/ us-gaap_DerivativeInstrumentRiskAxis
= us-gaap_CommodityContractMember
$ 0.8stz_SettlementsofUndesignatedCommoditySwapContractsNetofIncomeTax
/ us-gaap_DerivativeInstrumentRiskAxis
= us-gaap_CommodityContractMember
$ (0.1)stz_SettlementsofUndesignatedCommoditySwapContractsNetofIncomeTax
/ us-gaap_DerivativeInstrumentRiskAxis
= us-gaap_CommodityContractMember
$ (0.3)stz_SettlementsofUndesignatedCommoditySwapContractsNetofIncomeTax
/ us-gaap_DerivativeInstrumentRiskAxis
= us-gaap_CommodityContractMember
$ (0.4)stz_SettlementsofUndesignatedCommoditySwapContractsNetofIncomeTax
/ us-gaap_DerivativeInstrumentRiskAxis
= us-gaap_CommodityContractMember
$ 0stz_SettlementsofUndesignatedCommoditySwapContractsNetofIncomeTax
/ us-gaap_DerivativeInstrumentRiskAxis
= us-gaap_CommodityContractMember
$ 0stz_SettlementsofUndesignatedCommoditySwapContractsNetofIncomeTax
/ us-gaap_DerivativeInstrumentRiskAxis
= us-gaap_CommodityContractMember
$ 0stz_SettlementsofUndesignatedCommoditySwapContractsNetofIncomeTax
/ us-gaap_DerivativeInstrumentRiskAxis
= us-gaap_CommodityContractMember
$ 2.8stz_SettlementsofUndesignatedCommoditySwapContractsNetofIncomeTax
/ us-gaap_DerivativeInstrumentRiskAxis
= us-gaap_CommodityContractMember
$ (0.4)stz_SettlementsofUndesignatedCommoditySwapContractsNetofIncomeTax
/ us-gaap_DerivativeInstrumentRiskAxis
= us-gaap_CommodityContractMember