Related Parties - Narrative (Details)	Sep. 30, 2022 trustee
Related Party Transaction [Line Items]
SMR Trust ownership in NAI	80.00%
National Amusements, Inc.
Related Party Transaction [Line Items]
NAI ownership of Paramount common stock Class A common stock (percentage)	77.40%
NAI ownership of Paramount Class A and Class B common stock on a combined basis (percentage)	9.80%
Number of trustees	7
Number of beneficiary trustees	2