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DEBT FACILITIES (Details) $ in Millions | Mar. 31, 2018 USD ($) | Mar. 31, 2018 CAD ($) | Mar. 31, 2017 USD ($) | Mar. 31, 2017 CAD ($)
--- | --- | --- | --- | ---
Disclosure of detailed information about borrowings [line items] |  |  |  |
Debt |  | $ 1,260,900,000 |  | $ 1,255,400,000
Revolving Unsecured Term Credit Facility, September 2022 |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |
Line of credit facility, maximum borrowing capacity | $ 550.0 | 550,000,000 | $ 550.0 |
Line of credit facility, maximum borrowing capacity option | $ 850.0 | 850,000,000 |  |
Debt |  | $ 0 |  | $ 0

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- Definition Line of Credit Facility, Maximum Borrowing Capacity1 + References No definition available. + Details
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Namespace Prefix: | cae_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Definition Line of Credit Facility, Maximum Borrowing Capacity Option + References No definition available. + Details
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Namespace Prefix: | cae_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- 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
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Balance Type: | credit
Period Type: | instant

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- 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
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- Details
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Namespace Prefix: |
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Balance Type: |
Period Type: |