Goodwill and Purchased and Other Intangibles (Details) - USD ($) $ in Thousands		12 Months Ended
		Dec. 01, 2017	Dec. 02, 2016
Goodwill by reportable segment [Abstract]
Goodwill, Beginning Balance		$ 5,406,474	$ 5,366,881
Acquisitions		348,352	35,802
Other	[1]	66,735	3,791
Goodwill, Ending Balance		5,821,561	5,406,474
Digital Media [Member]
Goodwill by reportable segment [Abstract]
Goodwill, Beginning Balance		2,796,590	2,796,302
Acquisitions		0	0
Other	[1]	4,501	288
Goodwill, Ending Balance		2,801,091	2,796,590
Digital Marketing [Member]
Goodwill by reportable segment [Abstract]
Goodwill, Beginning Balance		2,351,462	2,312,158
Acquisitions		348,352	35,802
Other	[1]	62,232	3,502
Goodwill, Ending Balance		2,762,046	2,351,462
Print and Publishing [Member]
Goodwill by reportable segment [Abstract]
Goodwill, Beginning Balance		258,422	258,421
Acquisitions		0	0
Other	[1]	2	1
Goodwill, Ending Balance		$ 258,424	$ 258,422

[1] Amounts primarily consist of foreign currency translation adjustments.