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Segment Reporting - Segment Reporting Information by Category and Reportable Segment (Parenthetical) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Segment Reporting Information [Line Items]
Percentage of total revenues represented by largest customer	18.20%	11.00%	22.20%	11.30%
IMAX DMR [Member]
Segment Reporting (Textual) [Abstract]
Marketing costs and expense	$ 3.2	$ 0.4	$ 5.8	$ 2.8
Joint revenue sharing arrangements [Member]
Segment Reporting (Textual) [Abstract]
Advertising, marketing and commission costs	0.8	0.7	1.9	1.3
IMAX systems [Member]
Segment Reporting (Textual) [Abstract]
Advertising, marketing and commission costs	$ 0.3	0.6	0.9	1.0
Film Distribution [Member]
Segment Reporting (Textual) [Abstract]
Marketing costs and expense		0.2	$ 0.1	0.4
Impairment loss		$ 5.4		$ 9.9

X

- Definition

Percentage of total revenues represented by largest customers if first and third customers are under common control.

+ References

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- Definition

Segment reporting.

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- Definition

The aggregate amount of write-downs for impairments recognized during the period for long-lived assets held for abandonment, exchange or sale.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 28
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=123570139&loc=d3e3602-108585

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 360
-SubTopic 10
-Section 45
-Paragraph 15
-URI http://asc.fasb.org/extlink&oid=123351718&loc=d3e2611-110228

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Expenditures for planning and executing the conception, pricing, promotion, and distribution of ideas, goods, and services. Costs of public relations and corporate promotions are typically considered to be marketing costs.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 220
-SubTopic 10
-Section S99
-Paragraph 2
-Subparagraph (SX 210.5-03.4)
-URI http://asc.fasb.org/extlink&oid=123367319&loc=SL114868664-224227

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- 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.

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- Definition

The aggregate total amount of expenses directly related to the marketing or selling of products or services.

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