Goodwill and Other Intangible Assets - Net Intangible Assets (Detail) $ in Millions	9 Months Ended
	Sep. 30, 2023 USD ($)
Intangible Assets, Net (Excluding Goodwill) [Abstract]
Intangible assets with finite lives, Beginning balance	$ 77.7
Intangible assets with finite lives, Ending balance	77.8
Intangible assets with finite lives, Accumulated amortization, Beginning balance	(73.2)
Accumulated amortization	(1.6)
Foreign Currency Translation Adjustments and OtherTotal net intangible assets with finite lives	0.1	[1]
Gross carrying amount	0.1	[1]
Intangible assets with finite lives, Accumulated amortization, Ending balance	(74.8)
Net intangible assets with finite lives, Beginning balance	4.5
Amortization, intangible assets	(1.6)
Net intangible assets with finite lives, Ending balance	3.0
Indefinite-lived Intangible Assets, Tradename and Other, Beginning Balance	300.1
Indefinite-Lived Intangible Assets Acquired	0.2	[2]
Impairment of Intangible Assets, Indefinite-Lived (Excluding Goodwill)	(0.4)	[3]
Tradename and other, Amortization	(0.4)	[3]
Foreign Currency Translation Adjustments, Tradename and Other	0.1	[1]
Indefinite-lived Intangible Assets, Tradename and Other, Ending Balance	300.0
Total intangible assets - net, Beginning balance	304.6
Additions, total intangible assets net	0.2	[2]
Amortization, Total intangible assets net	(1.6)
Disposals, total intangible assets net	(0.4)	[3]
Foreign Currency Translation Adjustments, Total intangible assets - net	0.2	[1]
Total intangible assets - net, Ending balance	$ 303.0

[1] (3) Includes foreign currency translation adjustments and the write-off of liquor licenses for closed theatres.

[2] (1) Amount represents licenses acquired to sell alcoholic beverages for certain theatres

[3] (2) Relates to the sale of the Company’s Ecuador subsidiary. See Note 6.