Business Segments (Details) - USD ($) $ in Thousands		3 Months Ended
		Mar. 31, 2018	Mar. 31, 2017		Dec. 31, 2017
Segment Reporting Information [Line Items]
Operating revenues	[1]	$ 443,635	$ 439,910
Operating profit (loss)	[1],[2]	187,285	(20,967)
Depreciation		13,775	13,571
Amortization		41,687	41,659
Capital expenditures		13,673	14,634
Total Assets	[3]	8,047,704			$ 8,169,328
Assets held for sale	[4]	0			38,900
Gracenote Companies | Discontinued Operations, Disposed of by Sale
Segment Reporting Information [Line Items]
Capital expenditures		0	1,578	[5],[6]
Television and Entertainment
Segment Reporting Information [Line Items]
Operating revenues		440,702	436,033	[7]
Operating Segments | Television and Entertainment
Segment Reporting Information [Line Items]
Operating revenues	[1]	440,702	436,033
Operating profit (loss)	[1],[2]	211,852	20,013
Depreciation		10,870	10,039
Amortization		41,687	41,659
Capital expenditures		10,126	10,807
Total Assets		6,997,516			7,197,859
Corporate and Other
Segment Reporting Information [Line Items]
Operating revenues	[1]	2,933	3,877
Operating profit (loss)	[1],[2]	(24,567)	(40,980)
Depreciation		2,905	3,532
Capital expenditures		3,547	$ 2,249
Total Assets		$ 1,050,188			$ 932,569

[1] (1)See Note 2 for the disclosures of operating revenues and operating loss included in discontinued operations for the historical periods.

[2] (2)Operating profit (loss) for each segment excludes income and loss on equity investments, interest and dividend income, interest expense, non-operating items, reorganization costs and income taxes.

[3] (1) The Company’s consolidated total assets as of March 31, 2018 and December 31, 2017 include total assets of variable interest entities (“VIEs”) of $77 million and $81 million, respectively, which can only be used to settle the obligations of the VIEs. The Company’s consolidated total liabilities as of March 31, 2018 and December 31, 2017 include total liabilities of the VIEs of $27 million and $29 million, respectively, for which the creditors of the VIEs have no recourse to the Company (see Note 1).

[4] (3)See Note 3 for information regarding assets held for sale.

[5] (1) Results of operations for the Gracenote Companies are reflected through January 31, 2017, the date of the Gracenote Sale.

[6] (2)Non-cash investing and financing activities of Digital and Data businesses included in the Gracenote Sale were immaterial.

[7] (1)Prior period amounts have not been adjusted under the modified retrospective method.