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

The amount of outstanding funds that the entity is obligated to repay.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Name IAS
-Number 1
-IssueDate 2017-01-01
-Paragraph 55
-URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=1&date=2017-03-01&anchor=para_55&doctype=Standard
-URIDate 2017-03-09

+ Details

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

- Definition

The interest rate on borrowings. [Refer: Borrowings]

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Name IFRS
-Number 7
-IssueDate 2017-01-01
-Paragraph 7
-URI http://eifrs.ifrs.org/eifrs/XBRL?type=IFRS&num=7&date=2017-03-01&anchor=para_7&doctype=Standard
-URIDate 2017-03-09

+ Details

Name:	ifrs-full_BorrowingsInterestRate
Namespace Prefix:	ifrs-full_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- 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 2017-01-01
-Paragraph 112
-Subparagraph c
-URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=1&date=2017-03-01&anchor=para_112_c&doctype=Standard
-URIDate 2017-03-09

+ Details

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

- Details

Name:	ifrs-full_BorrowingsByNameAxis=cae_TermLoanBetweenOctober2020andDecember2021Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	ifrs-full_BorrowingsByNameAxis=cae_TermLoanApril2018Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	ifrs-full_BorrowingsByNameAxis=cae_TermLoanMarch2028Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	ifrs-full_BorrowingsByNameAxis=cae_TermLoanBetweenJune2021andDecember2025Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	cae_VariableRateTypeAxis=cae_LondonInterbankOfferedRateMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	cae_BorrowingswithRecourseAxis=cae_NonrecourseDebtMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

DEBT FACILITIES - Non-recourse Debt (Details) £ in Millions, $ in Millions, $ in Millions	Mar. 31, 2018 USD ($)	Mar. 31, 2018 CAD ($)	Mar. 31, 2018 GBP (£)	Mar. 31, 2017 USD ($)	Mar. 31, 2017 CAD ($)	Mar. 31, 2017 GBP (£)
Disclosure of detailed information about borrowings [line items]
Debt		$ 1,260.9			$ 1,255.4
Term Loan, Between October 2020 and December 2021
Disclosure of detailed information about borrowings [line items]
Notional amount	$ 14.5			$ 18.7
Borrowings, interest rate	3.31%	3.31%	3.31%
Term Loan, April 2018
Disclosure of detailed information about borrowings [line items]
Notional amount \| £			£ 0.7			£ 0.2
Borrowings, interest rate	13.50%	13.50%	13.50%
Term Loan, March 2028
Disclosure of detailed information about borrowings [line items]
Notional amount	$ 43.5			$ 47.1
Line of credit facility, maximum borrowing capacity		$ 12.0
Term Loan, Between June 2021 and December 2025
Disclosure of detailed information about borrowings [line items]
Notional amount		$ 22.3
London Interbank Offered Rate (LIBOR) \| Term Loan, March 2028
Disclosure of detailed information about borrowings [line items]
Borrowings, interest rate	2.50%	2.50%	2.50%
Non-recourse Debt
Disclosure of detailed information about borrowings [line items]
Debt		$ 86.0			62.6
Non-recourse Debt \| Term Loan, April 2018
Disclosure of detailed information about borrowings [line items]
Debt		1.3			0.4
Non-recourse Debt \| Term Loan, March 2028
Disclosure of detailed information about borrowings [line items]
Debt		55.8			62.2
Non-recourse Debt \| Term Loan, Between June 2021 and December 2025
Disclosure of detailed information about borrowings [line items]
Debt		$ 28.9			$ 0.0