Line of Credit Facility, Maximum Borrowing Capacity1

No definition available.

Name:	cae_LineofCreditFacilityMaximumBorrowingCapacity1
Namespace Prefix:	cae_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Unsecured Revolving Credit Facility, Years

+ References

No definition available.

+ Details

Name:	cae_UnsecuredRevolvingCreditFacilityYears
Namespace Prefix:	cae_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- 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_DisclosureOfDetailedInformationAboutBorrowingsLineItems
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

The nominal or face amount of a financial instrument, used to calculate payments made on that instrument.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Name IAS
-Number 1
-IssueDate 2020-01-01
-Paragraph 112
-Subparagraph c
-URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2020-en-r&anchor=para_112_c&doctype=Standard
-URIDate 2020-01-01

+ Details

Name:	ifrs-full_NotionalAmount
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:monetaryItemType
Balance Type:	na
Period Type:	instant

- Definition

The cash outflow for repayments of non-current borrowings. [Refer: Borrowings]

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Name IAS
-Number 7
-IssueDate 2020-01-01
-Paragraph 17
-URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=7&code=ifrs-tx-2020-en-r&anchor=para_17&doctype=Standard
-URIDate 2020-01-01

+ Details

Name:	ifrs-full_RepaymentsOfNoncurrentBorrowings
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

The amount of undrawn borrowing facilities that may be available for future operating activities and to settle capital commitments. [Refer: Capital commitments]

+ References

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Name IAS
-Number 7
-IssueDate 2020-01-01
-Paragraph 50
-Subparagraph a
-URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=7&code=ifrs-tx-2020-en-r&anchor=para_50_a&doctype=Standard
-URIDate 2020-01-01

+ Details

Name:	ifrs-full_UndrawnBorrowingFacilities
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Details

Name:	ifrs-full_BorrowingsByNameAxis=cae_ResearchAndDevelopmentObligationsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	ifrs-full_BorrowingsByNameAxis=cae_RevolvingUnsecuredTermCreditFacilitySeptember2023Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	ifrs-full_BorrowingsByNameAxis=cae_TermLoanMaturing2026Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	ifrs-full_BorrowingsByNameAxis=cae_USD50MillionTermLoanMaturing2022Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	ifrs-full_BorrowingsByNameAxis=cae_TwoYearUnsecuredRevolvingCreditFacilityMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

DEBT FACILITIES - Narrative (Details) € in Millions, $ in Millions, $ in Millions		1 Months Ended	12 Months Ended
	Apr. 09, 2020 CAD ($)	Mar. 31, 2021 USD ($)	Mar. 31, 2021 CAD ($)	Mar. 31, 2020 CAD ($)	Mar. 31, 2021 USD ($)	Mar. 31, 2021 EUR (€)
Disclosure of detailed information about borrowings [line items]
Repayment of long-term debt		$ 50.0	$ 86.1	$ 233.0
Unsecured revolving credit facility, years	2 years
R&D Obligations
Disclosure of detailed information about borrowings [line items]
Undrawn borrowing facilities			$ 38.5	$ 86.3
Revolving Unsecured Term Credit Facility, September 2023
Disclosure of detailed information about borrowings [line items]
Line of credit facility, maximum borrowing capacity					$ 850.0
Term Loan, Maturing 2026
Disclosure of detailed information about borrowings [line items]
Notional amount \| €						€ 31.7
USD $50 Million Term Loan Maturing 2022
Disclosure of detailed information about borrowings [line items]
Notional amount					$ 50.0
Two-Year Unsecured Revolving Credit Facility
Disclosure of detailed information about borrowings [line items]
Line of credit facility, maximum borrowing capacity	$ 500.0