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Note 15. Revenue from Contracts with Customers (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023
Revenue from Contracts with Customers [Line Items]
Deferred revenue	$ 2,039,825	$ 2,005,183
Contract liability, net change	$ 34,642
Contract liability, percent change	2.00%
Sales revenue net, from beginning contract liability	$ 433,600	$ 432,700
Solar Modules [Member]
Revenue from Contracts with Customers [Line Items]
Remaining performance obligation, aggregate transaction price	$ 20,500,000

X

- Definition

Contract Liability, Net Change

+ References

No definition available.

+ Details

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Namespace Prefix:	fslr_
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Balance Type:	credit
Period Type:	duration

X

- Definition

Contract Liability, Percent Change

+ References

No definition available.

+ Details

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Namespace Prefix:	fslr_
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Balance Type:	na
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X

- Definition

[Line Items] for Revenue from Contracts with Customers [Table]

+ References

No definition available.

+ Details

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X

- Definition

Amount of revenue recognized that was previously included in balance of obligation to transfer good or service to customer for which consideration from customer has been received or is due.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 606
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 8
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479806/606-10-50-8

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X

- Definition

Amount of deferred income and obligation to transfer product and service to customer for which consideration has been received or is receivable.

+ 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(26)(c))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480566/210-10-S99-1

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X

- Definition

Amount of transaction price allocated to performance obligation that has not been recognized as revenue.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name Accounting Standards Codification
-Section 50
-Paragraph 13
-Subparagraph (a)
-SubTopic 10
-Topic 606
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479806/606-10-50-13

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