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SUMMARY OF PRINCIPAL ACCOUNTING POLICIES - Property, plant and equipment (Details) - USD ($) $ in Thousands		12 Months Ended
	Jan. 01, 2022	Dec. 31, 2021	Dec. 31, 2023
Buildings | Minimum
Property, plant and equipment
Estimated useful lives			10 years
Buildings | Maximum
Property, plant and equipment
Estimated useful lives			20 years
Machinery | Minimum
Property, plant and equipment
Estimated useful lives			5 years
Machinery | Maximum
Property, plant and equipment
Estimated useful lives			10 years
Furniture, fixtures and equipment
Property, plant and equipment
Estimated useful lives			5 years
Motor vehicles
Property, plant and equipment
Estimated useful lives			5 years
Solar power systems | Depreciation life
Property, plant and equipment
Estimated useful lives	30 years
Maximum useful life of transferred to an offtaker	30 years
Increase or decrease in depreciation expenses		$ 2,186
Solar power systems | Minimum | Depreciation life
Property, plant and equipment
Estimated useful lives	20 years
Solar power systems | Maximum | Depreciation life
Property, plant and equipment
Estimated useful lives	25 years

X

- Definition

The amount of increase Decrease in Depreciation Expense .

+ References

No definition available.

+ Details

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Namespace Prefix:	csiq_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- Definition

Represents the maximum useful life of project to be transferred to an offtaker.

+ References

No definition available.

+ Details

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Namespace Prefix:	csiq_
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X

- 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

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
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X

- Definition

Useful life of long lived, physical assets used in the normal conduct of business and not intended for resale, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Examples include, but not limited to, land, buildings, machinery and equipment, office equipment, furniture and fixtures, and computer equipment.

+ References

No definition available.

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	instant

X

- Details

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Namespace Prefix:
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Balance Type:
Period Type:

X

- Details

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Balance Type:
Period Type:

X

- Details

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Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_PropertyPlantAndEquipmentByTypeAxis=us-gaap_MachineryAndEquipmentMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_PropertyPlantAndEquipmentByTypeAxis=us-gaap_FurnitureAndFixturesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

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Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_PropertyPlantAndEquipmentByTypeAxis=us-gaap_ElectricGenerationEquipmentMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

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