Acquisitions (Details) (USD $)	12 Months Ended		3 Months Ended		3 Months Ended		12 Months Ended		12 Months Ended
	Nov. 29, 2013	Nov. 30, 2012	Aug. 30, 2013 Neolane [Member]	Jul. 22, 2013 Neolane [Member]	Mar. 01, 2013 Behance [Member]	Dec. 20, 2012 Behance [Member]	Nov. 30, 2012 Efficient Frontier [Member]	Jan. 13, 2012 Efficient Frontier [Member]	Dec. 02, 2011 Series of individually immaterial business acquisitions [Member] businesscombinations	Dec. 02, 2011 Series of individually immaterial asset acquisitions [Member] assetacquistions
Business Acquisition [Line Items]
Business acquisition, purchase price				$ 616,700,000		$ 111,100,000		$ 374,700,000	$ 281,000,000
Asset acquisition, purchase price										47,300,000
Purchase price allocation, goodwill	618,094,000	291,422,000	515,200,000		91,400,000		291,400,000		213,300,000
Purchase price allocation, identifiable intangible assets				115,000,000		28,500,000		122,700,000	87,500,000
Number of asset acquisitions acquired										2
Number of businesses acquired									6
Purchase price allocation, net liabilities assumed				$ 13,500,000		$ 8,800,000		$ 39,400,000	$ 19,800,000