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Cash and Cash Equivalents - Additional Information (Detail)	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Bottom of range [member]
Disclosure of cash and cash equivalents [line items]
Time deposits interest rate	1.49%	0.42%
Top of range [member]
Disclosure of cash and cash equivalents [line items]
Time deposits interest rate	1.58%	1.00%

X

- Definition

Adjustment for interest rate earning time deposit.

+ References

No definition available.

+ Details

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Namespace Prefix:	cpa_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Disclosure of cash and cash equivalents.

+ References

No definition available.

+ Details

Name:	cpa_DisclosureOfCashAndCashEquivalentsLineItems
Namespace Prefix:	cpa_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Details

Name:	ifrs-full_RangeAxis=ifrs-full_BottomOfRangeMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_RangeAxis=ifrs-full_TopOfRangeMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: