Summary of Significant Accounting Policies - Warranty cost (Details) - USD ($) $ in Thousands	12 Months Ended
Dec. 31, 2024	Dec. 31, 2023
Warranty cost
Warranty accrual rate for sales of solar modules as a percentage of revenue	1.00%
Insurance receivable	$ 56,000	$ 82,735
Downward adjustment of other non-current assets	$ 18,024
Standard solar modules \| Material and workmanship
Warranty cost
Term of insurance policy over which the insurance premium will be amortized	25 years
Standard solar modules \| Performance guarantee against power degradation
Warranty cost
Term of insurance policy over which the insurance premium will be amortized	30 years
Battery storage products
Warranty cost
Extended Product Warranty Period	15 years
Solar power projects by EPC services
Warranty cost
Guarantee of solar modules for defects in materials and engineering design, installation and construction	2 years
Minimum \| Battery storage products
Warranty cost
Standard warranty	1 year
Maximum \| Battery storage products
Warranty cost
Standard warranty	5 years

Represents the extended period of time over which the entity guarantees against defects in materials and workmanship.

No definition available.

Name:	csiq_ExtendedProductWarrantyPeriod
Namespace Prefix:	csiq_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

Represents the term of the insurance policy over which the insurance premium will be amortized.

+ References

No definition available.

+ Details

Name:	csiq_InsurancePolicyTerm
Namespace Prefix:	csiq_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

Represents the adjustment to the expense charged against earnings for the period pertaining to other non-current assets.

+ References

No definition available.

+ Details

Name:	csiq_OtherNoncurrentAssetsAdjustment
Namespace Prefix:	csiq_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Represents the percentage of revenue which the entity uses as an estimate of warranty expense for sales of solar modules, which is included in cost of revenues.

+ References

No definition available.

+ Details

Name:	csiq_ProductWarrantyAccrualRateForSalesOfSolarModules
Namespace Prefix:	csiq_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Represents the period of time over which the entity guarantees against defects in materials and workmanship.

+ References

No definition available.

+ Details

Name:	csiq_StandardProductWarrantyPeriod
Namespace Prefix:	csiq_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

Represents the term of standard product warranty.

+ References

No definition available.

+ Details

Name:	csiq_StandardProductWarrantyTerm
Namespace Prefix:	csiq_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

Carrying amount due after one year of the balance sheet date (or one operating cycle, if longer) of amount due in settlement of a claim for reimbursement from an insurance company when the Company has suffered a loss covered under an insurance policy.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 210
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(17))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480566/210-10-S99-1

+ Details

Name:	us-gaap_InsuranceSettlementsReceivableNoncurrent
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

Name:	us-gaap_ProductWarrantyLiabilityLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Details

Name:	srt_ProductOrServiceAxis=csiq_StandardSolarModuleMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_GuaranteeObligationsByNatureAxis=csiq_MaterialAndWorkmanShipMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_GuaranteeObligationsByNatureAxis=csiq_PerformanceGuaranteeAgainstPowerDegradationMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_ProductOrServiceAxis=csiq_BatteryStorageProductsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_ProductOrServiceAxis=csiq_SolarPowerProjectsByEpcServicesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_RangeAxis=srt_MinimumMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_RangeAxis=srt_MaximumMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: