Segment Reporting (Summary Of The Operating Information) (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 30, 2017	Sep. 30, 2017	Jul. 01, 2017	Apr. 01, 2017	Dec. 31, 2016	Oct. 01, 2016	Jul. 02, 2016	Apr. 02, 2016	Dec. 30, 2017	Dec. 31, 2016	Jan. 02, 2016
Segment Reporting Information [Line Items]
Revenue	$ 1,313,785	$ 1,276,007	$ 1,291,994	$ 1,260,486	$ 1,257,819	$ 1,184,557	$ 1,215,962	$ 1,138,135	$ 5,142,272	$ 4,796,473	$ 4,425,267
Cost of revenues									854,091	779,116	750,781
Operating expenses									3,327,710	3,106,344	2,893,350
Total costs and expenses									4,181,801	3,885,460	3,644,131
Operating earnings									960,471	911,013	781,136
Domestic Segment [Member]
Segment Reporting Information [Line Items]
Revenue									4,575,171	4,245,097	3,904,454
Cost of revenues									755,729	676,437	651,826
Operating expenses									1,998,544	1,774,146	1,577,594
Total costs and expenses									2,754,273	2,450,583	2,229,420
Operating earnings									1,820,898	1,794,514	1,675,034
Global Segment [Member]
Segment Reporting Information [Line Items]
Revenue									567,101	551,376	520,813
Cost of revenues									98,362	102,679	98,955
Operating expenses									264,196	246,243	233,047
Total costs and expenses									362,558	348,922	332,002
Operating earnings									204,543	202,454	188,811
Other
Segment Reporting Information [Line Items]
Operating expenses									1,064,970	1,085,955	1,082,709
Total costs and expenses									1,064,970	1,085,955	1,082,709
Operating earnings									$ (1,064,970)	$ (1,085,955)	$ (1,082,709)