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CORPORATE BORROWINGS AND FINANCE LEASE OBLIGATIONS - Senior Secured Credit Facility (Details) $ / shares in Units, € in Millions, £ in Millions										12 Months Ended
	Feb. 15, 2021 EUR (€)	Feb. 01, 2021 shares	Jan. 29, 2021 USD ($) shares	Jan. 27, 2021 USD ($)	Dec. 14, 2020 USD ($) $ / shares shares	Jul. 31, 2020 USD ($)	Apr. 24, 2020 USD ($)	Apr. 22, 2019 USD ($)	Sep. 14, 2018 USD ($) shares	Dec. 31, 2021 USD ($)	Dec. 31, 2020 USD ($) shares	Dec. 31, 2019 USD ($)	Mar. 31, 2023 USD ($)	Dec. 31, 2021 EUR (€)	Dec. 31, 2021 GBP (£)	Oct. 15, 2020 USD ($)	Apr. 15, 2020 USD ($)	Dec. 07, 2017 EUR (€)	Mar. 17, 2017 USD ($)	Mar. 17, 2017 GBP (£)	Nov. 08, 2016 USD ($)	Nov. 08, 2016 GBP (£)
Corporate borrowings and finance lease obligations
Principal amount										$ 600,000,000.0
Payment of debt										20,000,000.0	$ 20,000,000.0	$ 21,900,000
Loss on repayment of indebtedness										(14,100,000)	93,600,000	(16,600,000)
Deferred financing costs										39,100,000	42,100,000
Other Nonoperating Income (Expense)										87,900,000	(28,900,000)	$ (13,400,000)
Noncurrent portion of long-term debt and finance lease obligations										5,471,200,000	$ 5,778,900,000
Second Lien Notes due 2026
Corporate borrowings and finance lease obligations
Debt instrument face amount						$ 1,289,100,000				173,200,000
Stated interest rate (as a percent)						10.00%
Redemption price of debt instrument (as a percent)						101.00%
First Lien Notes due 2025
Corporate borrowings and finance lease obligations
Debt instrument face amount							$ 500,000,000.0
Stated interest rate (as a percent)						10.50%	10.50%				10.50%	10.50%				10.50%	10.50%
Deferred financing costs							$ 8,900,000
Noncurrent portion of long-term debt and finance lease obligations																$ 10,000,000.0	$ 10,000,000.0
First Lien Notes due 2025 \| Maximum
Corporate borrowings and finance lease obligations
Redemption price of debt instrument (as a percent)							35.00%
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
Revolving credit facility
Corporate borrowings and finance lease obligations
Stated interest rate (as a percent)								5.875%
Payment of debt								$ 1,338,500,000
Loss on repayment of indebtedness								16,600,000
Loss on repayment of indebtedness								14,100,000
Third party costs related to modification								$ 2,500,000
Revolving credit facility \| LIBOR
Corporate borrowings and finance lease obligations
Spread on variable rate basis (as a percent)								1.00%
Stated interest rate (as a percent)								2.50%
Spread (as a percent)								1.00%
Revolving credit facility \| Federal Funds Effective Rate
Corporate borrowings and finance lease obligations
Spread on variable rate basis (as a percent)								0.50%
Spread (as a percent)								0.50%
Revolving credit facility \| Letter of Credit
Corporate borrowings and finance lease obligations
Aggregate principal amount								$ 225,000,000.0
Senior secured tranche B loan maturing April 22, 2026
Corporate borrowings and finance lease obligations
Aggregate principal amount								$ 2,000,000,000.0
Threshold percentage of equity interests pledged								100.00%
Threshold minimum percentage of voting stock								65.00%
Threshold percentage of annual excess cash flow								50.00%
Threshold percentage of annual excess cash flow if net leverage ratio is attained								0.00%
Threshold percentage of net cash proceeds of non-ordinary course asset sales								100.00%
Threshold percentage of net proceeds of issuance or incurrence of debt								100.00%
5.875% Senior Subordinated Notes due 2026.
Corporate borrowings and finance lease obligations
Debt instrument face amount										$ 539,393,000
Stated interest rate (as a percent)						5.875%				5.875%				5.875%	5.875%
6.375% Senior Subordinated Notes due 2024
Corporate borrowings and finance lease obligations
Deferred financing costs																					$ 14,100,000
Debt instrument face amount														€ 4.0	£ 4.0					£ 250.0		£ 250.0
Stated interest rate (as a percent)										6.375%	6.375%	6.375%		6.375%	6.375%				6.375%	6.375%	6.375%	6.375%
Deferred financing costs																			$ 12,700,000
Odeon Revolving Credit Facility
Corporate borrowings and finance lease obligations
Aggregate principal amount \| €																		€ 100.0
Undrawn commitment fee										0.50%
Odeon Revolving Credit Facility \| LIBOR
Corporate borrowings and finance lease obligations
Spread on variable rate basis (as a percent)										2.50%
Spread (as a percent)										2.50%
Senior Secured Credit Facility Term Loans \| LIBOR
Corporate borrowings and finance lease obligations
Stated interest rate (as a percent)								3.00%
Senior Secured Credit Facility Term Loans \| Federal Funds Effective Rate
Corporate borrowings and finance lease obligations
Spread on variable rate basis (as a percent)								0.50%
Spread (as a percent)								0.50%
Convertible Notes due 2026
Corporate borrowings and finance lease obligations
Deferred financing costs									$ 13,600,000
Consideration received for conversion \| shares			44,422,860
Principal amount				$ 600,000,000.0
Conversion amount			$ 600,000,000.0
Mudrick Capital Management LP \| Second Lien Notes due 2026
Corporate borrowings and finance lease obligations
Consideration received for conversion \| shares					13,736,264
Principal amount					$ 104,500,000
Class A common stock
Corporate borrowings and finance lease obligations
Consideration received for conversion \| shares		46,103,784
Class A common stock \| Second Lien Notes due 2026
Corporate borrowings and finance lease obligations
Consideration received for conversion \| shares											137,400,000
Principal amount											$ 104,500,000
Fair value of common stock											43,800,000
Loss on repayment of indebtedness											$ 93,600,000
Class A common stock \| Mudrick Capital Management LP
Corporate borrowings and finance lease obligations
Number of shares issued \| shares					21,978,022
Consideration received for commitment fee \| shares					8,241,758
Fair value of common stock					$ 70,100,000
Share Price \| $ / shares					$ 3.19
Class A common stock \| Mudrick Capital Management LP \| Second Lien Notes due 2026
Corporate borrowings and finance lease obligations
Principal amount					$ 100,000,000
Class B common stock \| Convertible Notes due 2026
Corporate borrowings and finance lease obligations
Consideration received for conversion \| shares									5,666,000
Odeon Cinemas Group Limited \| 140.0 million term loan facility agreement
Corporate borrowings and finance lease obligations
Debt instrument face amount \| €	€ 140.0
Net proceeds \| €	89.7
Odeon Cinemas Group Limited \| 296.0 million term loan facility agreement
Corporate borrowings and finance lease obligations
Debt instrument face amount \| €	296.0
Net proceeds \| €	€ 12.8