Note 2 - Revenue - Disaggregation of Revenue (Details) - USD ($) $ in Millions	3 Months Ended	9 Months Ended
Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Revenue	$ 604	$ 517	$ 1,589	$ 1,543
Sales Channel, Directly to Consumer [Member]
Revenue	316	306	948	946
Sales Channel, Through Intermediary [Member]
Revenue	288	211	641	597
Local Advertising [Member]
Revenue	188	218	549	655
National Advertising [Member]
Revenue	49	56	136	162
Political Advertising [Member]
Revenue	128	22	185	30
Advertising [Member]
Revenue	365	296	870	847
Retransmission Consent [Member]
Revenue	217	196	650	601
Production Companies [Member]
Revenue	11	16	32	62
Service, Other [Member]
Revenue	$ 11	$ 9	$ 37	$ 33

Amount, excluding tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value added and excise.

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