CONSOLIDATED STATEMENTS OF EQUITY - USD ($) $ in Thousands	Total	Common stock	Additional paid-in capital	Retained earnings	Accumulated other comprehensive income (loss)	Treasury stock	Noncontrolling Interests
Beginning Balance at Dec. 28, 2014	$ 3,489,273	$ 324,419	$ 546,406	$ 8,602,369	$ (778,769)	$ (5,439,511)	$ 234,359
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	522,686			459,522			63,164
Redeemable noncontrolling interests	(1,796)						(1,796)
Other comprehensive income (loss), net of tax	38,080				44,349		(6,269)
Comprehensive income	558,970
Dividends declared, $0.35 per share in 2017, $0.56 per share in 2016, $0.68 per share in 2015	(153,022)			(153,022)
Distributions to noncontrolling membership shareholders	(23,550)						(23,550)
Spin-off of businesses	(1,194,271)			(1,797,740)	603,469
Treasury stock acquired	(271,030)					(271,030)
Stock-based awards activity	(9,816)		(52,436)			42,620
Stock-based compensation	26,344		26,344
Tax benefit from settlement of stock awards	20,439		20,439
Other activity	13,407		(1,248)			15,790	(1,135)
Ending Balance at Dec. 31, 2015	2,456,744	324,419	539,505	7,111,129	(130,951)	(5,652,131)	264,773
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	487,999			436,697			51,302
Redeemable noncontrolling interests	(4,511)						(4,511)
Other comprehensive income (loss), net of tax	(35,487)				(27,980)		(7,507)
Comprehensive income	448,001
Dividends declared, $0.35 per share in 2017, $0.56 per share in 2016, $0.68 per share in 2015	(120,784)			(120,784)
Distributions to noncontrolling membership shareholders	(18,840)						(18,840)
Spin-off of businesses	(45,128)			(42,486)	(2,642)
Treasury stock acquired	(161,891)					(161,891)
Stock-based awards activity	(20,352)		(84,648)			64,296
Stock-based compensation	17,590		17,590
Other activity	(2,335)		1,295				(3,630)
Ending Balance at Dec. 31, 2016	2,553,005	324,419	473,742	7,384,556	(161,573)	(5,749,726)	281,587
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	215,046			273,744			(58,698)
Redeemable noncontrolling interests	(2,797)						(2,797)
Other comprehensive income (loss), net of tax	54,209			(6,260)	54,650		5,819
Comprehensive income	266,458
Dividends declared, $0.35 per share in 2017, $0.56 per share in 2016, $0.68 per share in 2015	(75,164)			(75,164)
Distributions to noncontrolling membership shareholders	(22,980)						(22,980)
Spin-off of businesses	(1,513,881)			(1,513,881)
Treasury stock acquired	(23,480)					(23,480)
Stock-based awards activity	(3,931)		(109,560)			105,629
Stock-based compensation	17,098		17,098
Deconsolidation of CareerBuilder	(202,931)						(202,931)
Other activity	847		847
Ending Balance at Dec. 31, 2017	$ 995,041	$ 324,419	$ 382,127	$ 6,062,995	$ (106,923)	$ (5,667,577)	$ 0