Revenue Recognition - Summary of Revenues Disaggregated Based on Timing of Revenue Recognition (Detail) - USD ($) $ in Millions		3 Months Ended
		Mar. 31, 2023	Mar. 31, 2022
Disaggregation of Revenue [Line Items]
Total revenue		$ 610.7	$ 460.5
U.S. Operating Segment
Disaggregation of Revenue [Line Items]
Total revenue	[1]	479.1	372.0
International Operating Segment
Disaggregation of Revenue [Line Items]
Total revenue		131.6	88.5
Goods and Services Transferred at a Point in Time
Disaggregation of Revenue [Line Items]
Total revenue		567.0	426.9
Goods and Services Transferred at a Point in Time | U.S. Operating Segment
Disaggregation of Revenue [Line Items]
Total revenue	[2]	447.8	348.3
Goods and Services Transferred at a Point in Time | International Operating Segment
Disaggregation of Revenue [Line Items]
Total revenue		119.2	78.6
Goods and Services Transferred Over Time
Disaggregation of Revenue [Line Items]
Total revenue	[3]	43.7	33.6
Goods and Services Transferred Over Time | U.S. Operating Segment
Disaggregation of Revenue [Line Items]
Total revenue	[2],[3]	31.3	23.7
Goods and Services Transferred Over Time | International Operating Segment
Disaggregation of Revenue [Line Items]
Total revenue	[3]	$ 12.4	$ 9.9

[1] 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.

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