XML 160 R137.htm IDEA: XBRL DOCUMENT
v3.8.0.1

Financial Instruments - Summary of Valuation Techniques and Significant Unobservable Inputs in Fair Value Measurement of Level 3 Financial Instruments (Details) - Level 3 | 12 Months Ended
--- | ---
Mar. 31, 2018
JWC Warrants |
Disclosure Of Financial Instruments [Line Items] |
Valuation techniques | Black-Scholes option pricing model
Significant unobservable inputs | Share price
Relationship of unobservable inputs to fair value | Increase or decrease in share price will result in an increase or decrease in fair value
JWC Shares |
Disclosure Of Financial Instruments [Line Items] |
Valuation techniques | Market approach
Significant unobservable inputs | Share price
Relationship of unobservable inputs to fair value | Increase or decrease in share price will result in an increase or decrease in fair value
HydRx Shares |
Disclosure Of Financial Instruments [Line Items] |
Valuation techniques | Market approach
Significant unobservable inputs | Share price
Relationship of unobservable inputs to fair value | Increase or decrease in share price will result in an increase or decrease in fair value
HydRx Warrants |
Disclosure Of Financial Instruments [Line Items] |
Valuation techniques | Black-Scholes option pricing model
Significant unobservable inputs | Share price
Relationship of unobservable inputs to fair value | Increase or decrease in share price will result in an increase or decrease in fair value
Agripharm Warrant |
Disclosure Of Financial Instruments [Line Items] |
Valuation techniques | Black-Scholes option pricing model
Significant unobservable inputs | Share price
Relationship of unobservable inputs to fair value | Increase or decrease in share price will result in an increase or decrease in fair value
BC Tweed Call Option Liability |
Disclosure Of Financial Instruments [Line Items] |
Valuation techniques | Market approach
Significant unobservable inputs | Appraised value of property
Relationship of unobservable inputs to fair value | Increase or decrease in value will result in a increase or decrease in fair value
BC Tweed and Vert Mirabel Put Liability |
Disclosure Of Financial Instruments [Line Items] |
Valuation techniques | Discounted cash flow
Significant unobservable inputs | Discount rate
Relationship of unobservable inputs to fair value | Increase or decrease in discount rate will result in a decrease or increase in fair value
BC Tweed and Vert Mirabel Put Liability |
Disclosure Of Financial Instruments [Line Items] |
Valuation techniques | Discounted cash flow
Significant unobservable inputs | Future wholesale price and production levels
Relationship of unobservable inputs to fair value | Increase in future wholesale price and production levels will result in an increase in fair value

X
- Definition The description of inputs used in the fair value measurement of assets. Inputs are the assumptions that market participants would use when pricing the asset, including assumptions about risk such as the risk inherent in a particular valuation technique used to measure fair value (such as a pricing model) and the risk inherent in the inputs to the valuation technique. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 13 -IssueDate 2017-01-01 -Paragraph 93 -Subparagraph d -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IFRS&num=13&date=2017-03-01&anchor=para_93_d&doctype=Standard -URIDate 2017-03-09 + Details
Name: | ifrs-full_DescriptionOfInputsUsedInFairValueMeasurementAssets
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition The description of inputs used in the fair value measurement of liabilities. Inputs are the assumptions that market participants would use when pricing the liability, including assumptions about risk such as the risk inherent in a particular valuation technique used to measure fair value (such as a pricing model) and the risk inherent in the inputs to the valuation technique. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 13 -IssueDate 2017-01-01 -Paragraph 93 -Subparagraph d -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IFRS&num=13&date=2017-03-01&anchor=para_93_d&doctype=Standard -URIDate 2017-03-09 + Details
Name: | ifrs-full_DescriptionOfInputsUsedInFairValueMeasurementLiabilities
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition The description of the sensitivity of the fair value measurement of assets to changes in unobservable inputs if a change to those inputs might result in a higher or lower fair value measurement. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 13 -IssueDate 2017-01-01 -Paragraph 93 -Subparagraph h -Clause i -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IFRS&num=13&date=2017-03-01&anchor=para_93_h_i&doctype=Standard -URIDate 2017-03-09 + Details
Name: | ifrs-full_DescriptionOfSensitivityOfFairValueMeasurementToChangesInUnobservableInputsAssets
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition The description of the sensitivity of the fair value measurement of liabilities to changes in unobservable inputs if a change in those inputs to a different amount might result in a higher or lower fair value measurement. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 13 -IssueDate 2017-01-01 -Paragraph 93 -Subparagraph h -Clause i -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IFRS&num=13&date=2017-03-01&anchor=para_93_h_i&doctype=Standard -URIDate 2017-03-09 + Details
Name: | ifrs-full_DescriptionOfSensitivityOfFairValueMeasurementToChangesInUnobservableInputsLiabilities
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition The description of the valuation techniques (for example, the market approach, cost approach and income approach) used for the fair value measurement of assets. [Refer: Valuation techniques [member]; Cost approach [member]; Income approach [member]; Market approach [member]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 13 -IssueDate 2017-01-01 -Paragraph 93 -Subparagraph d -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IFRS&num=13&date=2017-03-01&anchor=para_93_d&doctype=Standard -URIDate 2017-03-09 + Details
Name: | ifrs-full_DescriptionOfValuationTechniquesUsedInFairValueMeasurementAssets
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition The description of the valuation techniques (for example, the market approach, cost approach and income approach) used for the fair value measurement of liabilities. [Refer: Valuation techniques [member]; Cost approach [member]; Income approach [member]; Market approach [member]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 13 -IssueDate 2017-01-01 -Paragraph 93 -Subparagraph d -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IFRS&num=13&date=2017-03-01&anchor=para_93_d&doctype=Standard -URIDate 2017-03-09 + Details
Name: | ifrs-full_DescriptionOfValuationTechniquesUsedInFairValueMeasurementLiabilities
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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

X
- Details
Name: | ifrs-full_LevelsOfFairValueHierarchyAxis=ifrs-full_Level3OfFairValueHierarchyMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_ClassesOfAssetsAxis=cgc_JWCWarrantsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_ClassesOfAssetsAxis=cgc_JWCSharesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_ClassesOfAssetsAxis=cgc_HydRxSharesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_ClassesOfAssetsAxis=cgc_HydRxWarrantsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_ClassesOfAssetsAxis=cgc_AgripharmWarrantMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_ClassesOfLiabilitiesAxis=cgc_BCTweedCallOptionLiabilityMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_ClassesOfLiabilitiesAxis=cgc_BCTweedAndVertMirabelPutLiabilityInDiscountRateMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_ClassesOfLiabilitiesAxis=cgc_BCTweedAndVertMirabelPutLiabilityInFutureWholesalePriceAndProductionLevelsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |