Program Rights (Narrative) (Details) - USD ($) $ in Millions	3 Months Ended	9 Months Ended
Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Film, Disclosures [Abstract]
Program rights write-offs	$ 0.0	$ 0.0	$ 0.0	$ 0.0

The write-off of unamortized costs for program rights (including feature films and episodic series, acquired under license agreements or owned original program rights).

No definition available.

Name:	amcx_ProgramRightsWriteOffs
Namespace Prefix:	amcx_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration