Note 2 - Revenue - Disaggregation of Revenue (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Revenue	$ 601	$ 604	$ 1,692	$ 1,589
Sales Channel, Directly to Consumer [Member]
Revenue	402	316	1,117	948
Sales Channel, Through Intermediary [Member]
Revenue	199	288	575	641
Local Advertising [Member]
Revenue	232	188	657	549
National Advertising [Member]
Revenue	60	49	174	136
Political Advertising [Member]
Revenue	9	128	24	185
Advertising [Member]
Revenue	301	365	855	870
Retransmission Consent [Member]
Revenue	266	217	755	650
Production Companies [Member]
Revenue	20	11	44	32
Service, Other [Member]
Revenue	$ 14	$ 11	$ 38	$ 37