Note 3 - Acquisitions and Divestitures - Consideration (Details) - USD ($) $ in Millions		3 Months Ended
	Jan. 02, 2019	Mar. 31, 2019
Raycom, Excluding KYOU and WUPV [Member]
Purchase price		$ 3,660.0
Less - consideration allocated to all assets acquired and net of liabilites assumed for the Raycom overlap market stations which were also divested on January 2, 2019		(233.0)
Purchase consideration for assets acquired and liabilities assumed net of divestitures		3,427.0
KYOU-TV and WUPV-TV [Member]
Purchase price		17.0
Less - consideration allocated to all assets acquired and net of liabilites assumed for the Raycom overlap market stations which were also divested on January 2, 2019
Purchase consideration for assets acquired and liabilities assumed net of divestitures		17.0
Raycom [Member]
Purchase price	$ 3,660.0	3,677.0
Less - consideration allocated to all assets acquired and net of liabilites assumed for the Raycom overlap market stations which were also divested on January 2, 2019		(233.0)
Purchase consideration for assets acquired and liabilities assumed net of divestitures	$ 3,444.0	$ 3,444.0