Consolidated Statements of Stockholders' Equity - USD ($) $ in Millions	Restricted Stock [Member] Common Stock [Member] Common Class A [Member]	Restricted Stock [Member] Common Stock [Member]	Restricted Stock [Member] Retained Earnings [Member]	Restricted Stock [Member] Treasury Stock [Member] Common Class A [Member]	Restricted Stock [Member] Treasury Stock [Member]	Restricted Stock [Member] AOCI Attributable to Parent [Member]	Restricted Stock [Member]	Restricted Stock Units (RSUs) [Member] Common Stock [Member] Common Class A [Member]	Restricted Stock Units (RSUs) [Member] Common Stock [Member]	Restricted Stock Units (RSUs) [Member] Retained Earnings [Member]	Restricted Stock Units (RSUs) [Member] Treasury Stock [Member] Common Class A [Member]	Restricted Stock Units (RSUs) [Member] Treasury Stock [Member]	Restricted Stock Units (RSUs) [Member] AOCI Attributable to Parent [Member]	Restricted Stock Units (RSUs) [Member]	Common Stock [Member] Common Class A [Member]	Common Stock [Member]	Retained Earnings [Member]	Treasury Stock [Member] Common Class A [Member]	Treasury Stock [Member]	AOCI Attributable to Parent [Member]	Total
Balance (in shares) at Dec. 31, 2017															8,349,069	88,788,664		(1,750,692)	(5,535,076)
Balance at Dec. 31, 2017															$ 25	$ 903	$ 162	$ (24)	$ (50)	$ (22)	$ 994
Net income															0	0	210	0	0	0	211
Adjustment to pension liability, net of income tax															$ 0	$ 0	0	$ 0	$ 0	1	1
Restricted stock awards (in shares)	220,080	391,836		(89,422)	(107,456)			0	209,500		0	(82,201)
Restricted stock awards	$ 0	$ 0	$ 0	$ (2)	$ (2)	$ 0	$ (4)	$ 0	$ 0	$ 0	$ 0	$ (1)	$ 0	$ (1)
Forfeiture of restricted stock awards (in shares)															0	(91,057)		0	0
Forfeiture of restricted stock awards															$ 0	$ (1)	0	$ 0	$ 0	0	(1)
Repurchase of common stock (in shares)															0	0		0	(1,551,710)
Repurchase of common stock															$ 0	$ 0	0	$ 0	$ (19)	0	(19)
Stock-based compensation															2	5	0	0	0	0	7
Adoption of ASU 2018-02																				0
Forfeiture of restricted stock awards															$ (0)	$ 1	(0)	$ (0)	$ (0)	(0)	1
Balance (in shares) at Dec. 31, 2018															8,569,149	89,298,943		(1,840,114)	(7,276,443)
Balance at Dec. 31, 2018															$ 27	$ 907	372	$ (26)	$ (72)	(21)	1,187
Net income															0	0	179	0	0	0	179
Adjustment to pension liability, net of income tax															$ 0	$ 0	0	$ 0	$ 0	(5)	(5)
Restricted stock awards (in shares)															199,810	751,463		(47,653)	(152,371)
Restricted stock awards															$ 0	$ 0	0	$ 0	$ (3)	0	(3)
Repurchase of common stock (in shares)															0	0		0	(1,659,684)
Repurchase of common stock															$ 0	$ 0	0	$ 0	$ (32)	0	(32)
Stock-based compensation															4	12	0	0	0	0	16
Preferred stock dividends															$ 0	$ 0	(52)	$ 0	$ 0	0	(52)
Acquisitions of television businesses and licenses (in shares)															0	11,499,945		0	0
Acquisitions of television businesses and licenses															$ 0	$ 170	0	$ 0	$ 0	0	170
401(k) Plan (in shares)															0	196,509		0	0
401(k) Plan															$ 0	$ 4	0	$ 0	$ 0	0	4
Adoption of ASU 2018-02															$ 0	$ 0	5	$ 0	$ 0	(5)	0
Balance (in shares) at Dec. 31, 2019															8,768,959	101,746,860		(1,887,767)	(9,088,498)
Balance at Dec. 31, 2019															$ 31	$ 1,093	504	$ (26)	$ (107)	(31)	1,464
Net income															0	0	410	0	0	0	410
Adjustment to pension liability, net of income tax															$ 0	$ 0	0	$ 0	$ 0	(8)	(8)
Restricted stock awards (in shares)	166,814	359,481		0	(146,716)			0	374,500		0	(112,564)
Restricted stock awards	$ 0	$ 0	$ 0	$ 0	$ (2)	$ 0	$ (2)	$ 0	$ 0	$ 0	$ 0	$ (2)	$ 0	$ (2)
Forfeiture of restricted stock awards (in shares)															0	(85,630)		0	0
Forfeiture of restricted stock awards															$ 0	$ 0	0	$ 0	$ 0	0	0
Repurchase of common stock (in shares)															0	0		0	(5,457,884)
Repurchase of common stock															$ 0	$ 0	0	$ 0	$ (75)	0	(75)
Stock-based compensation															3	13	0	0	0	0	16
Preferred stock dividends															$ 0	$ 0	(52)	$ 0	$ 0	0	(52)
401(k) Plan (in shares)															0	430,899		0	0
401(k) Plan															$ 0	$ 4	0	$ 0	$ 0	0	4
Adoption of ASU 2018-02																				0
2007 Long Term Incentive Plan - stock options exercised (in shares)															0	274,746		0	(154,935)
2007 Long Term Incentive Plan - stock options exercised															$ 0	$ 0	0	$ 0	$ (2)	0	(2)
Forfeiture of restricted stock awards															$ 0	$ 0	0	$ 0	$ 0	0	0
Balance (in shares) at Dec. 31, 2020															8,935,773	103,100,856		(1,887,767)	(14,960,597)
Balance at Dec. 31, 2020															$ 34	$ 1,110	$ 862	$ (26)	$ (188)	$ (39)	$ 1,753