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Revenue Recognition (Narrative) (Details) - USD ($) $ in Millions | 1 Months Ended | 3 Months Ended | 6 Months Ended
--- | --- | --- | ---
Oct. 31, 2023 | Jun. 30, 2024 | Jun. 30, 2025 | Jun. 30, 2024
Revenue from Contract with Customer [Abstract] |  |  |  |
Revenue recognized |  |  | $ 32.3 | $ 38.8
One-time retroactive adjustment |  | $ 13.4 |  | $ 13.4
Maximum limit of unpaid customer receivables | $ 125.0 |  |  |

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- Definition Contract with Customer, Liability, One Time Retroactive Adjustment, Revenue Recognized + References No definition available. + Details
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Namespace Prefix: | amcx_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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- Definition Transfers Of Financial Assets Accounted For As Sale, Maximum Outstanding Balance + References No definition available. + Details
Name: | amcx_TransfersOfFinancialAssetsAccountedForAsSaleMaximumOutstandingBalance
Namespace Prefix: | amcx_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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- Definition Amount of revenue recognized that was previously included in balance of obligation to transfer good or service to customer for which consideration from customer has been received or is due. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 606 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 8 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479806/606-10-50-8 + Details
Name: | us-gaap_ContractWithCustomerLiabilityRevenueRecognized
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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- References No definition available. + Details
Name: | us-gaap_RevenueFromContractWithCustomerAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration