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Impairment of Long-Lived Assets - Summary of Long-Lived Asset Impairment Losses (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024
Impaired Long-Lived Assets Held and Used [Line Items]
Total Impairment	$ 0.6	$ 0.0	$ 2.2	$ 0.0
U.S. Operating Segment
Impaired Long-Lived Assets Held and Used [Line Items]
Theater properties	0.1		0.1
Total Impairment	0.1		0.1
International Operating Segment
Impaired Long-Lived Assets Held and Used [Line Items]
Theater properties	0.3		0.7
Theater operating lease right-of-use assets	0.2		1.4
Total Impairment	$ 0.5		$ 2.1

X

- Definition

Amount of write-down of assets recognized in the income statement. Includes, but is not limited to, losses from tangible assets, intangible assets and goodwill.

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- Definition

Amount of loss from impairment of right-of-use asset from operating lease.

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The charge against earnings resulting from the aggregate write down of tangible assets from their carrying value to their fair value.

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