Discontinued Operations Gracenote Companies Cash Flows (Details) - USD ($) $ in Thousands		12 Months Ended
		Dec. 31, 2016	Dec. 31, 2015	Dec. 28, 2014
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Stock-based compensation		$ 37,189	$ 32,493	$ 27,918
Depreciation		72,409	74,289	88,890
Amortization		196,663	195,230	222,216
Net cash		0	74,959	279,833
Capital expenditures		99,659	89,084	89,438
Settlements of contingent consideration, net		(3,636)	1,174	0
Gracenote Companies | Discontinued Operations, Disposed of by Sale
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Stock-based compensation		4,196	2,239	1,641
Depreciation		13,584	9,735	7,744
Amortization		29,999	28,826	21,233
Net cash	[1]	0	(58,996)	(246,051)
Capital expenditures	[1]	23,548	23,626	13,102
Settlements of contingent consideration, net	[1]	$ (3,636)	$ 1,174	$ 0

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