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CORPORATE BORROWINGS AND FINANCE LEASE OBLIGATIONS - Long-term debt and lease obligations (Details) € in Millions, £ in Millions					12 Months Ended		24 Months Ended
	Jan. 15, 2021 USD ($)	Jul. 31, 2020 USD ($)	Apr. 24, 2020 USD ($)	Mar. 17, 2017 USD ($)	Dec. 31, 2021 USD ($)	Dec. 31, 2020 USD ($)	Dec. 31, 2021 USD ($)	Mar. 31, 2023 USD ($)	Dec. 31, 2021 EUR (€)	Dec. 31, 2021 GBP (£)	Oct. 15, 2020 USD ($)	Apr. 15, 2020 USD ($)	Dec. 31, 2019	Apr. 22, 2019	Sep. 14, 2018 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					$ 5,169,100,000	$ 5,411,600,000	$ 5,169,100,000
Finance lease obligations					72,700,000	96,000,000.0	72,700,000
Paid-in-kind interest for 10%/12%/Cash/PIK/Toggle Second Lien Subordinated Notes due 2026						7,600,000
Deferred financing costs					39,100,000	42,100,000	39,100,000
Net premium					298,000,000.0	338,700,000	298,000,000.0
Total long-term debt and finance lease obligations					5,500,700,000	5,811,800,000	5,500,700,000
Current maturities corporate borrowings					(20,000,000.0)	(20,000,000.0)	(20,000,000.0)
Current maturities of finance lease liabilities					(9,500,000)	(12,900,000)	(9,500,000)
Noncurrent portion of long-term debt and finance lease obligations					5,471,200,000	5,778,900,000	5,471,200,000
Redemption at any time prior to April 15, 2022
CORPORATE BORROWINGS AND FINANCE LEASE OBLIGATIONS
Debt instrument redemption amount as a percentage of principal amount			100.00%
2.95% Senior Secured Convertible Notes due 2024
CORPORATE BORROWINGS AND FINANCE LEASE OBLIGATIONS
Stated interest rate (as a percent)		2.95%													2.95%
Debt instrument face amount		$ 1,462,300,000
2.95% Senior Secured Convertible Notes due 2026
CORPORATE BORROWINGS AND FINANCE LEASE OBLIGATIONS
Carrying value of corporate borrowings						600,000,000.0
Net premium						$ (61,500,000)
Stated interest rate (as a percent)						2.95%							2.95%
Convertible Notes due 2026
CORPORATE BORROWINGS AND FINANCE LEASE OBLIGATIONS
Derivative liability															$ 90,400,000
Senior Subordinated Notes
CORPORATE BORROWINGS AND FINANCE LEASE OBLIGATIONS
Debt instrument face amount		$ 1,782,500,000			235,000,000.0		235,000,000.0
Debt instrument redemption amount as a percentage of principal amount		23.90%
6.375% Senior Subordinated Notes due 2024
CORPORATE BORROWINGS AND FINANCE LEASE OBLIGATIONS
Carrying value of corporate borrowings					5,400,000	$ 5,400,000	5,400,000									£ 250.0
Deferred financing costs				$ 12,700,000
Net premium					$ 100,000		$ 100,000
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	£ 4.0						£ 250.0		£ 250.0
6.375% Senior Subordinated Notes due 2024 \| On or after November 15, 2019
CORPORATE BORROWINGS AND FINANCE LEASE OBLIGATIONS
Debt Instrument, Redemption Price as Percentage of Principal Amount					104.781%
Debt instrument redemption amount as a percentage of principal amount				35.00%
6.375% Senior Subordinated Notes due 2024 \| On or after November 15, 2021
CORPORATE BORROWINGS AND FINANCE LEASE OBLIGATIONS
Debt Instrument, Redemption Price as Percentage of Principal Amount					100.00%
6.375% Senior Subordinated Notes due 2024 \| Minimum \| On or after November 15, 2019
CORPORATE BORROWINGS AND FINANCE LEASE OBLIGATIONS
Debt instrument redemption amount as a percentage of principal amount				100.00%
6.375% Senior Subordinated Notes due 2024 \| Maximum \| On or after November 15, 2019
CORPORATE BORROWINGS AND FINANCE LEASE OBLIGATIONS
Debt instrument redemption amount as a percentage of principal amount				104.781%
5.75 % Senior Subordinated Notes due 2025
CORPORATE BORROWINGS AND FINANCE LEASE OBLIGATIONS
Carrying value of corporate borrowings					$ 98,300,000	$ 98,300,000	$ 98,300,000
Stated interest rate (as a percent)						5.75%							5.75%						5.75%
Debt instrument face amount																			$ 600,000,000.0
5.75 % Senior Subordinated Notes due 2025 \| Redemption at any time on or after April 15, 2022
CORPORATE BORROWINGS AND FINANCE LEASE OBLIGATIONS
Debt Instrument, Redemption Price as Percentage of Principal Amount					102.875%
5.75 % Senior Subordinated Notes due 2025 \| On or after June 15, 2020
CORPORATE BORROWINGS AND FINANCE LEASE OBLIGATIONS
Debt Instrument, Redemption Price as Percentage of Principal Amount					100.00%
5.875% Senior Subordinated Notes due 2026
CORPORATE BORROWINGS AND FINANCE LEASE OBLIGATIONS
Carrying value of corporate borrowings					$ 55,600,000	$ 55,600,000	55,600,000
Stated interest rate (as a percent)						5.875%							5.875%				5.875%	5.875%
Debt instrument face amount																	$ 595,000,000.0
5.875% Senior Subordinated Notes due 2026 \| Redemption at any time on or after April 15, 2022
CORPORATE BORROWINGS AND FINANCE LEASE OBLIGATIONS
Debt Instrument, Redemption Price as Percentage of Principal Amount					102.938%
5.875% Senior Subordinated Notes due 2026 \| On or after November 15, 2021
CORPORATE BORROWINGS AND FINANCE LEASE OBLIGATIONS
Debt Instrument, Redemption Price as Percentage of Principal Amount					100.00%
6.125% Senior Subordinated Notes due 2027
CORPORATE BORROWINGS AND FINANCE LEASE OBLIGATIONS
Carrying value of corporate borrowings					$ 130,700,000	$ 130,700,000	130,700,000
Deferred financing costs				$ 19,800,000
Stated interest rate (as a percent)				6.125%		6.125%							6.125%			6.125%
Debt instrument face amount				$ 475,000,000.0
Debt Instrument, Redemption Price as Percentage of Principal Amount				100.00%
Debt instrument redemption amount as a percentage of principal amount				35.00%
6.125% Senior Subordinated Notes due 2027 \| Minimum
CORPORATE BORROWINGS AND FINANCE LEASE OBLIGATIONS
Debt Instrument, Redemption Price as Percentage of Principal Amount				100.00%
6.125% Senior Subordinated Notes due 2027 \| Maximum
CORPORATE BORROWINGS AND FINANCE LEASE OBLIGATIONS
Debt Instrument, Redemption Price as Percentage of Principal Amount				103.063%
Senior Secured Credit Facility
CORPORATE BORROWINGS AND FINANCE LEASE OBLIGATIONS
Debt instrument face amount								$ 100,000,000
Senior Secured Credit Facility \| Minimum
CORPORATE BORROWINGS AND FINANCE LEASE OBLIGATIONS
Debt instrument face amount					25,000,000		25,000,000
6.0% Senior Secured Notes due 2023
CORPORATE BORROWINGS AND FINANCE LEASE OBLIGATIONS
Stated interest rate (as a percent)														6.00%
Senior Secured Credit Facility Term-Loan Due 2026
CORPORATE BORROWINGS AND FINANCE LEASE OBLIGATIONS
Carrying value of corporate borrowings					1,945,000,000.0	$ 1,965,000,000.0	1,945,000,000.0
Net premium					$ (6,100,000)	(7,500,000)	$ (6,100,000)
Stated interest rate (as a percent)					3.103%		3.103%		3.103%	3.103%
Revolving credit facility
CORPORATE BORROWINGS AND FINANCE LEASE OBLIGATIONS
Carrying value of corporate borrowings						212,200,000
Odeon Term Loan Facility due 2023
CORPORATE BORROWINGS AND FINANCE LEASE OBLIGATIONS
Carrying value of corporate borrowings					$ 552,600,000		$ 552,600,000
Net premium					$ (12,100,000)		$ (12,100,000)
Stated interest rate (as a percent)					10.75%		10.75%		10.75%	10.75%
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%
PIK interest rate							11.25%
Debt instrument face amount									€ 312.2	£ 147.6
Odeon Revolving Credit Facility Due 2022
CORPORATE BORROWINGS AND FINANCE LEASE OBLIGATIONS
Carrying value of corporate borrowings						120,800,000
Second Lien Notes due 2026
CORPORATE BORROWINGS AND FINANCE LEASE OBLIGATIONS
Carrying value of corporate borrowings		$ 1,997,400,000			$ 1,508,000,000.0	1,423,600,000	$ 1,508,000,000.0
Net premium					364,600,000	445,100,000	364,600,000
Stated interest rate (as a percent)		10.00%
PIK interest rate		12.00%
Debt instrument face amount		$ 1,289,100,000			173,200,000		173,200,000
Debt Instrument, Redemption Price as Percentage of Principal Amount		101.00%
Debt instrument redemption amount as a percentage of principal amount		100.00%
First Lien Notes due 2025
CORPORATE BORROWINGS AND FINANCE LEASE OBLIGATIONS
Carrying value of corporate borrowings					500,000,000.0	500,000,000.0	500,000,000.0
Deferred financing costs			$ 8,900,000
Net premium					(7,200,000)	$ (8,900,000)	(7,200,000)
Noncurrent portion of long-term debt and finance lease obligations											$ 10,000,000.0	$ 10,000,000.0
Stated interest rate (as a percent)		10.50%	10.50%			10.50%					10.50%	10.50%	10.50%
Debt instrument face amount			$ 500,000,000.0
Percentage of voting of foreign subsidiary			65.00%
First Lien Notes due 2025 \| Redemption at any time on or after April 15, 2022
CORPORATE BORROWINGS AND FINANCE LEASE OBLIGATIONS
Debt instrument redemption amount as a percentage of principal amount			110.50%
First Lien Notes due 2025 \| Maximum
CORPORATE BORROWINGS AND FINANCE LEASE OBLIGATIONS
Debt Instrument, Redemption Price as Percentage of Principal Amount			35.00%
First Lien Notes due 2026
CORPORATE BORROWINGS AND FINANCE LEASE OBLIGATIONS
Carrying value of corporate borrowings		$ 300,000,000			300,000,000.0	$ 300,000,000.0	300,000,000.0
Deferred financing costs		$ 6,000,000.0
Net premium					$ (24,500,000)	$ (28,500,000)	$ (24,500,000)
Stated interest rate (as a percent)		10.50%			10.50%	10.50%	10.50%		10.50%	10.50%			10.50%
Debt instrument face amount		$ 200,000,000			$ 300,000,000		$ 300,000,000
Debt Instrument, Redemption Price as Percentage of Principal Amount		100.00%
Debt instrument redemption amount as a percentage of principal amount		110.50%
First Lien Notes due 2026 \| Maximum
CORPORATE BORROWINGS AND FINANCE LEASE OBLIGATIONS
Debt Instrument, Redemption Price as Percentage of Principal Amount		35.00%
First Lien Secured Notes Due 2026
CORPORATE BORROWINGS AND FINANCE LEASE OBLIGATIONS
Carrying value of corporate borrowings					73,500,000		73,500,000
First Lien Toggle Notes due 2026
CORPORATE BORROWINGS AND FINANCE LEASE OBLIGATIONS
Net premium					$ (16,800,000)		$ (16,800,000)
Stated interest rate (as a percent)					15.00%	15.00%	15.00%		15.00%	15.00%
PIK interest rate					17.00%
Debt instrument face amount	$ 100,000,000.0
First Lien Toggle Notes due 2026 \| Debt Agreement with Mudrick Capital Management, LP [Member]
CORPORATE BORROWINGS AND FINANCE LEASE OBLIGATIONS
Stated interest rate (as a percent)	15.00%
PIK interest rate	17.00%
Second Lien Subordinated Notes due 2026
CORPORATE BORROWINGS AND FINANCE LEASE OBLIGATIONS
Stated interest rate (as a percent)					10.00%	10.00%	10.00%		10.00%	10.00%
PIK interest rate					12.00%	12.00%