The decrease of net assets after tax equity transactions.

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The percentage of ownership of common stock or equity participation in the investee accounted for under the equity method of accounting.

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Represents the number of units purchased during period.

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The percentage of ownership of common stock or equity participation in the investee accounted for under the equity method of accounting.

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Amount of gain (loss) on sale or disposal of an equity method investment.

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The amount by which the fair value of an investment is less than the amortized cost basis or carrying amount of that investment at the balance sheet date and the decline in fair value is deemed to be other than temporary, before considering whether or not such amount is recognized in earnings or other comprehensive income.

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Amount of income (loss) for proportionate share of equity method investee's income (loss).

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The cash outflow associated with the purchase of or advances to an equity method investments, which are investments in joint ventures and entities in which the entity has an equity ownership interest normally of 20 to 50 percent and exercises significant influence.

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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.

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No definition available.

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Price of a single share of a number of saleable stocks of a company.

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No definition available.

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Number of new stock issued during the period.

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INVESTMENTS IN AFFILIATES - Other investments (Details)			1 Months Ended	12 Months Ended
INVESTMENTS IN AFFILIATES - Other investments (Details)	Mar. 05, 2021 USD ($) shares	Mar. 05, 2021 JPY (¥) ¥ / shares shares	Sep. 30, 2021 USD ($)	Dec. 31, 2021 USD ($) shares	Dec. 31, 2021 JPY (¥) shares	Dec. 31, 2020 USD ($)	Dec. 31, 2019 USD ($)	Oct. 31, 2021	Sep. 05, 2018 shares	Oct. 26, 2017 shares	Dec. 31, 2015
Other investments
Subscription amount				$ 54,004,000		$ 17,758,000	$ 7,684,000
Equity in earnings (loss) of unconsolidated investees				7,256,000		10,779,000	28,948,000
Impairment loss of investment				0		24,060,000	0
Gain on sale of interest in affiliates				$ 10,392,000		$ 13,936,000	$ 1,928,000
Canadian Solar Infrastructure Fund, Inc
Other investments
Stock Issued During Period, Shares, New Issues \| shares	151,500	151,500
Investment price per unit \| ¥ / shares		¥ 125,115
Suzhou Financial Leasing Co., Ltd.
Other investments
Ownership percentage				4.78%	4.78%	4.78%					4.78%
Canadian Solar Infrastructure Fund, Inc
Other investments
Subscription amount	$ 25,683	¥ 2,843,238		$ 55,697	¥ 6,247,998
Ownership percentage				14.64%	14.64%	14.66%
Number of Units Purchased \| shares		22,725		56,620	56,620				7,000
Canadian Solar Infrastructure Fund, Inc \| Initial public offer
Other investments
Number of Units Purchased \| shares										25,395
Canadian Solar Infrastructure Fund, Inc \| Private placement
Other investments
Number of Units Purchased \| shares										1,500
RE Crimson Holdings LLC
Other investments
Ownership percentage			20.00%
Interest sold (in percent)			80.00%
Gain on sale of interest in affiliates			$ 123,135,000
Net assets derecognized			$ 42,333,000
Horus Solar S.A. De Capital Variable ("Horus") and Recursos Solares PV De Mxico II S.A. De Capital Variable ("Recursos") [Member]
Other investments
Ownership percentage				49.00%	49.00%
Gain on sale of interest in affiliates				$ 113,843,000		$ 100,896,000
Net assets derecognized				$ 7,527,000		$ 10,363,000
JuSheng (Suzhou) Solar Tech Co., Ltd
Other investments
Ownership percentage				4.55%	4.55%			4.55%