CORPORATE BORROWINGS AND FINANCE LEASE LIABILITIES - Long-term debt and lease obligations (Details) - USD ($) $ in Millions		3 Months Ended	9 Months Ended
	Jul. 24, 2025	Sep. 30, 2025	Sep. 30, 2025	Jul. 01, 2025	Dec. 31, 2024	Sep. 30, 2024
CORPORATE BORROWINGS AND FINANCE LEASE LIABILITIES
Total principal amount of corporate borrowings		$ 4,003.4	$ 4,003.4		$ 4,134.5
Finance lease liabilities		52.9	52.9		49.3
Paid-in-kind interest for 6.00%/8.00% Cash/PIK Toggle Senior Secured Exchangeable Notes due 2030		12.8	12.8		1.5
Deferred financing costs		(58.0)	(58.0)		(47.2)
Net discount		(39.7)	(39.7)		(171.3)
Total carrying value of corporate borrowings and finance lease liabilities		4,062.9	4,062.9		4,124.4
Current maturities of corporate borrowings		(19.9)	(19.9)		(64.2)
Current maturities of finance lease liabilities		(5.5)	(5.5)		(4.4)
Total noncurrent carrying value of corporate borrowings and finance lease liabilities		4,037.5	4,037.5		4,055.8
Credit Agreement-Term Loans due 2029
CORPORATE BORROWINGS AND FINANCE LEASE LIABILITIES
Total principal amount of corporate borrowings		1,999.1	1,999.1		2,014.2
Net discount		$ (35.3)	$ (35.3)		$ (43.4)
Effective interest rate		11.134%	11.134%		11.356%
Odeon Senior Secured Note 2027
CORPORATE BORROWINGS AND FINANCE LEASE LIABILITIES
Total principal amount of corporate borrowings		$ 400.0	$ 400.0		$ 400.0
Net discount		$ (16.3)	$ (16.3)		(20.9)
Stated interest rate (as a percent)		12.75%	12.75%
Senior secured exchangeable notes due 2030
CORPORATE BORROWINGS AND FINANCE LEASE LIABILITIES
Total principal amount of corporate borrowings		$ 154.5	$ 154.5	$ 194.4
Paid-in-kind interest for 6.00%/8.00% Cash/PIK Toggle Senior Secured Exchangeable Notes due 2030		0.8	0.8
Deferred financing costs		(6.3)	(6.3)	(6.4)
Net discount		(27.1)	(27.1)	(35.4)
Bifurcated embedded derivative		$ 64.8	$ 64.8	41.7
Effective interest rate		14.30%	14.30%
Interest rate cash (as a percent)	6.00%		6.00%
PIK interest rate (as a percent)	2.00%		2.00%
Senior Secured Notes due 2029
CORPORATE BORROWINGS AND FINANCE LEASE LIABILITIES
Total principal amount of corporate borrowings		$ 857.0	$ 857.0
Net discount		66.0	$ 66.0
Interest rate cash (as a percent)	9.00%		9.00%
PIK interest rate (as a percent)	6.00%		6.00%
First Lien Notes due 2029
CORPORATE BORROWINGS AND FINANCE LEASE LIABILITIES
Total principal amount of corporate borrowings		$ 360.0	$ 360.0	590.0	950.0
Deferred financing costs				(5.6)
Stated interest rate (as a percent)		7.50%	7.50%
5.75% Senior Subordinated Notes due 2025
CORPORATE BORROWINGS AND FINANCE LEASE LIABILITIES
Total principal amount of corporate borrowings					$ 44.1
Stated interest rate (as a percent)					5.75%
5.875% Senior Subordinated Notes due 2026
CORPORATE BORROWINGS AND FINANCE LEASE LIABILITIES
Total principal amount of corporate borrowings					$ 41.9
Stated interest rate (as a percent)		5.875%	5.875%
6.125% Senior Subordinated Notes due 2027
CORPORATE BORROWINGS AND FINANCE LEASE LIABILITIES
Total principal amount of corporate borrowings		$ 125.5	$ 125.5		125.5
Stated interest rate (as a percent)		6.125%	6.125%
6.00%/8.00% Cash/PIK Toggle Senior Secured Exchangeable Notes due 2030
CORPORATE BORROWINGS AND FINANCE LEASE LIABILITIES
Total principal amount of corporate borrowings		$ 107.3	$ 107.3	337.4	427.6
Paid-in-kind interest for 6.00%/8.00% Cash/PIK Toggle Senior Secured Exchangeable Notes due 2030		2.5	2.5		1.5
Deferred financing costs		(5.3)	(5.3)	(17.1)	(23.3)
Net discount		(27.0)	(27.0)		(117.9)
Bifurcated embedded derivative		$ 26.7	$ 26.7	$ 88.3	157.6
Effective interest rate		15.12%	15.12%
Interest rate cash (as a percent)		6.00%	6.00%
PIK interest rate (as a percent)		8.00%	8.00%
Second Lien Subordinated Notes due 2026
CORPORATE BORROWINGS AND FINANCE LEASE LIABILITIES
Total principal amount of corporate borrowings					131.2	$ 574.6
Net discount					$ 10.9
Interest rate cash (as a percent)			10.00%
PIK interest rate (as a percent)			12.00%

AMC ENTERTAINMENT HOLDINGS, INC. 10-Q