Revenue Recognition - Summary of Revenues Disaggregated Based on Timing of Revenue Recognition (Detail) - USD ($) $ in Millions		3 Months Ended		6 Months Ended
		Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Disaggregation of Revenue [Line Items]
Total revenue		$ 942.3	$ 744.1	$ 1,553.0	$ 1,204.6
Goods and Services Transferred at a Point in Time
Disaggregation of Revenue [Line Items]
Total revenue		907.5	703.6	1,474.5	1,130.5
Goods and Services Transferred Over Time
Disaggregation of Revenue [Line Items]
Total revenue	[1]	34.8	40.5	78.5	74.1
U.S. Operating Segment
Disaggregation of Revenue [Line Items]
Total revenue	[2]	734.9	600.8	1,214.0	972.8
U.S. Operating Segment | Goods and Services Transferred at a Point in Time
Disaggregation of Revenue [Line Items]
Total revenue	[3]	714.7	573.8	1,162.5	922.1
U.S. Operating Segment | Goods and Services Transferred Over Time
Disaggregation of Revenue [Line Items]
Total revenue	[1],[3]	20.2	27.0	51.5	50.7
International Operating Segment
Disaggregation of Revenue [Line Items]
Total revenue		207.4	143.3	339.0	231.8
International Operating Segment | Goods and Services Transferred at a Point in Time
Disaggregation of Revenue [Line Items]
Total revenue		192.8	129.8	312.0	208.4
International Operating Segment | Goods and Services Transferred Over Time
Disaggregation of Revenue [Line Items]
Total revenue	[1]	$ 14.6	$ 13.5	$ 27.0	$ 23.4

[1] Amount includes amortization of NCM screen advertising advances. See Screen Advertising Advances and Other Deferred Revenue below.

[2] U.S. segment revenue excludes intercompany transactions with the international operating segment. See Note 16 for the amount of intercompany eliminations for the periods presented.

[3] U.S. segment revenue excludes intercompany transactions with the international operating segment. See Note 16 for the amount of intercompany eliminations for the periods presented.