Goodwill and other intangible assets - Narrative (Details) - Retransmission agreements $ in Millions	9 Months Ended
Sep. 30, 2022 USD ($)
Finite-Lived Intangible Assets [Line Items]
Decrease in accumulated amortization	$ 10.4
Decrease in gross intangible assets	$ 10.4

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

No definition available.

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