Supplemental Information to Condensed Consolidated Statements of Cash Flows (Parenthetical) (Detail) - USD ($) $ in Millions	9 Months Ended	12 Months Ended
Sep. 30, 2022	Dec. 31, 2021
Supplemental Cash Flow Elements [Abstract]
Additions to theatre properties and equipment included in accounts payable	$ 12.4	$ 8.2

Future cash outflow to pay for purchases of fixed assets that have occurred.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 50
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Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
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Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
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-SubTopic 10
-Section 50
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-URI https://asc.fasb.org/extlink&oid=126999549&loc=d3e4304-108586

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