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Represents the threshold minimum percentage of voting stock.

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Face (par) amount of debt instrument at time of issuance.

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Contractual interest rate for funds borrowed, under the debt agreement.

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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Present value of lessee's discounted obligation for lease payments from finance lease.

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CORPORATE BORROWINGS AND FINANCE LEASE LIABILITIES - Long-term debt and lease obligations (Details) € in Millions, £ in Millions, $ in Millions			3 Months Ended				12 Months Ended
	Feb. 14, 2022 USD ($)	Jul. 31, 2020 USD ($)	Dec. 31, 2022 USD ($)	Sep. 30, 2022 USD ($)	Jun. 30, 2022 USD ($)	Mar. 31, 2022 USD ($)	Dec. 31, 2022 USD ($)	Dec. 31, 2021 USD ($)	Dec. 31, 2022 GBP (£)	Dec. 31, 2022 EUR (€)	Jan. 15, 2021 USD ($)	Dec. 31, 2020	Oct. 15, 2020 USD ($)	Apr. 24, 2020 USD ($)	Apr. 15, 2020 USD ($)	Sep. 14, 2018	Mar. 17, 2017 USD ($)	Mar. 17, 2017 GBP (£)	Nov. 08, 2016 USD ($)	Nov. 08, 2016 GBP (£)	Jun. 05, 2015 USD ($)
CORPORATE BORROWINGS AND FINANCE LEASE OBLIGATIONS
Carrying value of corporate borrowings			$ 4,949.0				$ 4,949.0	$ 5,169.1
Finance lease obligations			58.8				58.8	72.7
Deferred financing costs			37.9				37.9	39.1
Net premium			229.7				229.7	298.0
Total long-term debt and finance lease obligations			5,199.6				5,199.6	5,500.7
Current maturities corporate borrowings			(20.0)				(20.0)	(20.0)
Current maturities of finance lease liabilities			(5.5)				(5.5)	(9.5)
Noncurrent portion of long-term debt and finance lease obligations			5,174.1				5,174.1	5,471.2
Principal and premium repayments			529.5	$ 7.4	$ 57.9	$ 955.7
2.95% Senior Secured Convertible Notes due 2024
CORPORATE BORROWINGS AND FINANCE LEASE OBLIGATIONS
Stated interest rate (as a percent)		2.95%														2.95%
Senior Subordinated Notes
CORPORATE BORROWINGS AND FINANCE LEASE OBLIGATIONS
Debt instrument face amount		$ 1,782.5	235.0				235.0
6.375% Senior Subordinated Notes due 2024
CORPORATE BORROWINGS AND FINANCE LEASE OBLIGATIONS
Carrying value of corporate borrowings			4.8				4.8	5.4										£ 250.0
Deferred financing costs																	$ 12.7
Net premium			$ 0.1				$ 0.1	$ 0.1
Stated interest rate (as a percent)			6.375%				6.375%	6.375%	6.375%	6.375%		6.375%					6.375%	6.375%	6.375%	6.375%
Debt instrument face amount										€ 4.0								£ 250.0		£ 250.0
5.75 % Senior Subordinated Notes due 2025
CORPORATE BORROWINGS AND FINANCE LEASE OBLIGATIONS
Carrying value of corporate borrowings			$ 98.3				$ 98.3	$ 98.3
Stated interest rate (as a percent)			5.75%				5.75%	5.75%	5.75%	5.75%											5.75%
Debt instrument face amount																					$ 600.0
5.875% Senior Subordinated Notes due 2026
CORPORATE BORROWINGS AND FINANCE LEASE OBLIGATIONS
Carrying value of corporate borrowings			$ 55.6				$ 55.6	$ 55.6
Stated interest rate (as a percent)			5.875%				5.875%	5.875%	5.875%	5.875%									5.875%	5.875%
Debt instrument face amount																			$ 595.0
6.125% Senior Subordinated Notes due 2027
CORPORATE BORROWINGS AND FINANCE LEASE OBLIGATIONS
Carrying value of corporate borrowings			$ 125.5				$ 125.5	$ 130.7
Deferred financing costs																	$ 19.8
Stated interest rate (as a percent)			6.125%				6.125%	6.125%	6.125%	6.125%							6.125%	6.125%
Debt instrument face amount			$ 5.3				$ 5.3										$ 475.0
Odeon Senior Secured Note 2027
CORPORATE BORROWINGS AND FINANCE LEASE OBLIGATIONS
Net premium			$ (31.1)				$ (31.1)
Stated interest rate (as a percent)			12.75%				12.75%	12.75%	12.75%	12.75%
Senior Secured Credit Facility Term-Loan Due 2026
CORPORATE BORROWINGS AND FINANCE LEASE OBLIGATIONS
Carrying value of corporate borrowings			$ 1,925.0				$ 1,925.0	$ 1,945.0
Net premium			$ (4.8)				$ (4.8)	(6.1)
Stated interest rate (as a percent)			7.274%				7.274%		7.274%	7.274%
Odeon Term Loan Facility due 2023
CORPORATE BORROWINGS AND FINANCE LEASE OBLIGATIONS
Carrying value of corporate borrowings								552.6
Net premium								$ (12.1)
Interest rate percentage in year one			10.75%				10.75%		10.75%	10.75%
Interest rate percentage in year thereafter			11.25%				11.25%		11.25%	11.25%
Debt instrument face amount									£ 147.6	€ 312.2
Odeon Senior Secured Notes Due 2027
CORPORATE BORROWINGS AND FINANCE LEASE OBLIGATIONS
Carrying value of corporate borrowings			$ 400.0				$ 400.0
Stated interest rate (as a percent)			12.75%				12.75%	12.75%	12.75%	12.75%
First Lien Notes due 2029
CORPORATE BORROWINGS AND FINANCE LEASE OBLIGATIONS
Carrying value of corporate borrowings			$ 950.0				$ 950.0
Stated interest rate (as a percent)	7.50%		7.50%				7.50%	7.50%	7.50%	7.50%
Debt instrument face amount	$ 950.0
Threshold Minimum Percentage of Voting Stock	65.00%
First Lien Notes due 2025
CORPORATE BORROWINGS AND FINANCE LEASE OBLIGATIONS
Carrying value of corporate borrowings								$ 500.0
Deferred financing costs														$ 8.9
Net premium								$ (7.2)
Noncurrent portion of long-term debt and finance lease obligations													$ 10.0		$ 10.0
Stated interest rate (as a percent)	10.50%	10.50%	10.50%				10.50%	10.50%	10.50%	10.50%			10.50%	10.50%	10.50%
Principal and premium repayments	$ 500.0
Debt instrument face amount														$ 500.0
First Lien Notes due 2026
CORPORATE BORROWINGS AND FINANCE LEASE OBLIGATIONS
Carrying value of corporate borrowings		$ 300.0						$ 300.0
Deferred financing costs			$ 6.0				$ 6.0
Net premium								$ (24.5)
Stated interest rate (as a percent)	10.50%	10.50%	10.50%				10.50%	10.50%	10.50%	10.50%
Debt instrument face amount	$ 300.0	$ 200.0	$ 300.0				$ 300.0
First Lien Toggle Notes due 2026
CORPORATE BORROWINGS AND FINANCE LEASE OBLIGATIONS
Carrying value of corporate borrowings								$ 73.5
Net premium								$ (16.8)
Interest rate cash (as a percent)	15.00%						15.00%	15.00%
PIK interest rate (as a percent)	17.00%						17.00%	17.00%
Principal and premium repayments	$ 73.5
Debt instrument face amount											$ 100.0
Second Lien Subordinated Notes due 2026
CORPORATE BORROWINGS AND FINANCE LEASE OBLIGATIONS
Carrying value of corporate borrowings			1,389.8				$ 1,389.8	$ 1,508.0
Net premium			265.5				$ 265.5	$ 364.6
Interest rate cash (as a percent)							10.00%	10.00%
PIK interest rate (as a percent)							12.00%	12.00%
Second Lien Notes due 2026
CORPORATE BORROWINGS AND FINANCE LEASE OBLIGATIONS
Carrying value of corporate borrowings		$ 1,997.4
Stated interest rate (as a percent)		10.00%
PIK interest rate (as a percent)		12.00%
Debt instrument face amount		$ 1,289.1	$ 173.2				$ 173.2