REVENUE RECOGNITION - Transaction price allocated to the remaining performance obligations (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Customer Frequency Program
Deferred revenues and income	$ 402.7	$ 408.6
Gift Card And Ticket Exchange
Customer Frequency Program
Redemption period	24 months
Deferred revenues and income	$ 315.3
Loyalty Program
Customer Frequency Program
Redemption period	24 months
Deferred revenues and income	$ 67.2
Exhibitor Services Agreement
Customer Frequency Program
Expected to be recognized as revenue	505.8
Exhibitor Services Agreement \| Year Ended 2023
Customer Frequency Program
Expected to be recognized as revenue	21.1
Exhibitor Services Agreement \| Year Ended 2024
Customer Frequency Program
Expected to be recognized as revenue	22.6
Exhibitor Services Agreement \| Year Ended 2025
Customer Frequency Program
Expected to be recognized as revenue	24.4
Exhibitor Services Agreement \| Year Ended 2026
Customer Frequency Program
Expected to be recognized as revenue	26.2
Exhibitor Services Agreement \| Year Ended 2027
Customer Frequency Program
Expected to be recognized as revenue	28.2
Exhibitor Services Agreement \| Years Ended 2028 through February 2037
Customer Frequency Program
Expected to be recognized as revenue	$ 383.3