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Appendix 1 - Major Subsidiaries of CSI (Details) (USD $)	12 Months Ended
	Dec. 31, 2014
Major Subsidiaries of CSI
Amount of Restricted Net Assets for Consolidated and Unconsolidated Subsidiaries	393,532,526us-gaap_AmountOfRestrictedNetAssetsForConsolidatedAndUnconsolidatedSubsidiaries
CSI Solartronics (Changshu) Co., Ltd.
Major Subsidiaries of CSI
Attributable Equity Interest Held (as a percent)	100.00%us-gaap_SubsidiaryOrEquityMethodInvesteeCumulativePercentageOwnershipAfterAllTransactions / dei_LegalEntityAxis = csiq_CSISolartronicsChangshuCoLtdMember
CSI Solar Technologies Inc.
Major Subsidiaries of CSI
Attributable Equity Interest Held (as a percent)	100.00%us-gaap_SubsidiaryOrEquityMethodInvesteeCumulativePercentageOwnershipAfterAllTransactions / dei_LegalEntityAxis = csiq_CSISolarTechnologiesIncMember
CSI Solar Manufacture Inc.
Major Subsidiaries of CSI
Attributable Equity Interest Held (as a percent)	100.00%us-gaap_SubsidiaryOrEquityMethodInvesteeCumulativePercentageOwnershipAfterAllTransactions / dei_LegalEntityAxis = csiq_CSISolarManufactureIncMember
Canadian Solar Manufacturing (Luoyang) Inc.
Major Subsidiaries of CSI
Attributable Equity Interest Held (as a percent)	100.00%us-gaap_SubsidiaryOrEquityMethodInvesteeCumulativePercentageOwnershipAfterAllTransactions / dei_LegalEntityAxis = csiq_CanadianSolarManufacturingLuoyangIncMember
Canadian Solar Manufacturing (Changshu) Inc.
Major Subsidiaries of CSI
Attributable Equity Interest Held (as a percent)	100.00%us-gaap_SubsidiaryOrEquityMethodInvesteeCumulativePercentageOwnershipAfterAllTransactions / dei_LegalEntityAxis = csiq_CanadianSolarManufacturingChangshuIncMember
SZCC, or CSI Cells
Major Subsidiaries of CSI
Attributable Equity Interest Held (as a percent)	100.00%us-gaap_SubsidiaryOrEquityMethodInvesteeCumulativePercentageOwnershipAfterAllTransactions / dei_LegalEntityAxis = csiq_CSICellsCoLtdMember
Canadian Solar (USA) Inc.
Major Subsidiaries of CSI
Attributable Equity Interest Held (as a percent)	100.00%us-gaap_SubsidiaryOrEquityMethodInvesteeCumulativePercentageOwnershipAfterAllTransactions / dei_LegalEntityAxis = csiq_CanadianSolarUSAIncMember
CSI Project Consulting GmbH
Major Subsidiaries of CSI
Attributable Equity Interest Held (as a percent)	70.00%us-gaap_SubsidiaryOrEquityMethodInvesteeCumulativePercentageOwnershipAfterAllTransactions / dei_LegalEntityAxis = csiq_CSIProjectConsultingGmbHMember
Canadian Solar Japan K.K.
Major Subsidiaries of CSI
Attributable Equity Interest Held (as a percent)	90.67%us-gaap_SubsidiaryOrEquityMethodInvesteeCumulativePercentageOwnershipAfterAllTransactions / dei_LegalEntityAxis = csiq_CanadianSolarJapanKKMember
Canadian Solar Solutions Inc.
Major Subsidiaries of CSI
Attributable Equity Interest Held (as a percent)	100.00%us-gaap_SubsidiaryOrEquityMethodInvesteeCumulativePercentageOwnershipAfterAllTransactions / dei_LegalEntityAxis = csiq_CanadianSolarSolutionsIncMember
SZSP
Major Subsidiaries of CSI
Attributable Equity Interest Held (as a percent)	100.00%us-gaap_SubsidiaryOrEquityMethodInvesteeCumulativePercentageOwnershipAfterAllTransactions / dei_LegalEntityAxis = csiq_CSISolarPowerChinaIncMember
Canadian Solar EMEA GmbH
Major Subsidiaries of CSI
Attributable Equity Interest Held (as a percent)	100.00%us-gaap_SubsidiaryOrEquityMethodInvesteeCumulativePercentageOwnershipAfterAllTransactions / dei_LegalEntityAxis = csiq_CanadianSolarEMEAGmbHMember
Canadian Solar (Australia) Pty., Ltd.
Major Subsidiaries of CSI
Attributable Equity Interest Held (as a percent)	100.00%us-gaap_SubsidiaryOrEquityMethodInvesteeCumulativePercentageOwnershipAfterAllTransactions / dei_LegalEntityAxis = csiq_CanadianSolarAustraliaPtyLtdMember
HKSI
Major Subsidiaries of CSI
Attributable Equity Interest Held (as a percent)	100.00%us-gaap_SubsidiaryOrEquityMethodInvesteeCumulativePercentageOwnershipAfterAllTransactions / dei_LegalEntityAxis = csiq_CanadianSolarInternationalLtdMember
Canadian Solar O&M (Ontario) Inc.
Major Subsidiaries of CSI
Attributable Equity Interest Held (as a percent)	100.00%us-gaap_SubsidiaryOrEquityMethodInvesteeCumulativePercentageOwnershipAfterAllTransactions / dei_LegalEntityAxis = csiq_CanadianSolarOAndMOntarioIncMember
Suzhou Sanysolar Materials Technology Co., Ltd.
Major Subsidiaries of CSI
Attributable Equity Interest Held (as a percent)	80.00%us-gaap_SubsidiaryOrEquityMethodInvesteeCumulativePercentageOwnershipAfterAllTransactions / dei_LegalEntityAxis = csiq_SuzhouSanysolarMaterialsTechnologyCoLtdMember
Canadian Solar South East Asia Pte., Ltd.
Major Subsidiaries of CSI
Attributable Equity Interest Held (as a percent)	100.00%us-gaap_SubsidiaryOrEquityMethodInvesteeCumulativePercentageOwnershipAfterAllTransactions / dei_LegalEntityAxis = csiq_CanadianSolarSouthEastAsiaPteLtdMember
Canadian Solar Manufacturing (Suzhou) Inc.
Major Subsidiaries of CSI
Attributable Equity Interest Held (as a percent)	61.00%us-gaap_SubsidiaryOrEquityMethodInvesteeCumulativePercentageOwnershipAfterAllTransactions / dei_LegalEntityAxis = csiq_CanadianSolarManufacturingSuzhouIncMember
Canadian Solar South Africa Pty., Ltd.
Major Subsidiaries of CSI
Attributable Equity Interest Held (as a percent)	100.00%us-gaap_SubsidiaryOrEquityMethodInvesteeCumulativePercentageOwnershipAfterAllTransactions / dei_LegalEntityAxis = csiq_CanadianSolarSouthAfricaPtyLtdMember
Canadian Solar Brasil Servicos De Consultoria EM Energia Solar Ltda.
Major Subsidiaries of CSI
Attributable Equity Interest Held (as a percent)	100.00%us-gaap_SubsidiaryOrEquityMethodInvesteeCumulativePercentageOwnershipAfterAllTransactions / dei_LegalEntityAxis = csiq_CanadianSolarBrasilServicosDeConsultoriaEMEnergiaSolarLtdMember
Canadian Solar Middle East Limited
Major Subsidiaries of CSI
Attributable Equity Interest Held (as a percent)	100.00%us-gaap_SubsidiaryOrEquityMethodInvesteeCumulativePercentageOwnershipAfterAllTransactions / dei_LegalEntityAxis = csiq_CanadianSolarMiddleEastLimitedMember
Canadian Solartronics (Suzhou) Co., Ltd.
Major Subsidiaries of CSI
Attributable Equity Interest Held (as a percent)	100.00%us-gaap_SubsidiaryOrEquityMethodInvesteeCumulativePercentageOwnershipAfterAllTransactions / dei_LegalEntityAxis = csiq_CanadianSolartronicsSuzhouCoLtdMember
Canadian Solar (Thailand) Ltd.
Major Subsidiaries of CSI
Attributable Equity Interest Held (as a percent)	100.00%us-gaap_SubsidiaryOrEquityMethodInvesteeCumulativePercentageOwnershipAfterAllTransactions / dei_LegalEntityAxis = csiq_CanadianSolarThailandLtdMember
Canadian Solar Construction (USA) LLC
Major Subsidiaries of CSI
Attributable Equity Interest Held (as a percent)	100.00%us-gaap_SubsidiaryOrEquityMethodInvesteeCumulativePercentageOwnershipAfterAllTransactions / dei_LegalEntityAxis = csiq_CanadianSolarConstructionUsaLLCMember
CSI-GCL (Yancheng) Solar Manufacturing Co., Ltd.
Major Subsidiaries of CSI
Attributable Equity Interest Held (as a percent)	80.00%us-gaap_SubsidiaryOrEquityMethodInvesteeCumulativePercentageOwnershipAfterAllTransactions / dei_LegalEntityAxis = csiq_CSIGCLYanchengSolarManufacturingCoLtdMember
Changsu Tegu New Materials Technology Co., Ltd.
Major Subsidiaries of CSI
Attributable Equity Interest Held (as a percent)	75.00%us-gaap_SubsidiaryOrEquityMethodInvesteeCumulativePercentageOwnershipAfterAllTransactions / dei_LegalEntityAxis = csiq_ChangsuTeguNewMaterialsTechnologyCoLtdMember
Changshu Tlink Co., Ltd.
Major Subsidiaries of CSI
Attributable Equity Interest Held (as a percent)	100.00%us-gaap_SubsidiaryOrEquityMethodInvesteeCumulativePercentageOwnershipAfterAllTransactions / dei_LegalEntityAxis = csiq_ChangshuTlinkCoLtdMember

X

- Definition

Amount of restricted net assets of consolidated and unconsolidated subsidiaries as of the end of the most recently completed fiscal year.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 235

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.4-08.(e)(3)(ii))

-URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690



Reference 2: http://www.xbrl.org/2003/role/presentationRef

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-Name Regulation S-X (SX)

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-Section 08

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