Business Acquisitions, Investments and Redeemable Noncontrolling Interests (Pro Forma Results) (Details) - USD ($) $ / shares in Units, $ in Thousands		3 Months Ended								12 Months Ended
		Dec. 03, 2016	Aug. 27, 2016	May 28, 2016	Feb. 27, 2016	Nov. 28, 2015	Aug. 29, 2015	May 30, 2015	Feb. 28, 2015	Dec. 03, 2016	Nov. 28, 2015	Nov. 29, 2014
Business Acquisition [Line Items]
Net sales		$ 376,947	$ 331,387	$ 364,968	$ 316,272	$ 372,547	$ 357,557	$ 399,799	$ 351,123	$ 1,389,573	$ 1,481,026	$ 1,512,854
Net sales, pro forma												1,575,113
Operating profit		124,736	114,401	121,861	100,901	122,289	119,755	133,610	112,975	461,899	488,629	497,035
Operating profit, pro forma												236,919
Net earnings attributable to CLARCOR Inc.		$ 29,000	$ 35,749	$ 53,354	$ 21,163	$ 33,053	$ 36,445	$ 38,497	$ 26,709	$ 139,266	$ 134,704	144,084
Net earnings, pro forma												$ 161,120
Diluted earnings per share (in dollars per share)		$ 0.59	$ 0.73	$ 1.09	$ 0.43	$ 0.67	$ 0.72	$ 0.76	$ 0.53	$ 2.84	$ 2.67	$ 2.83
Diluted earnings per share, pro forma (in dollars per share)												$ 3.17
Engine Mobile Filtration [Member]
Business Acquisition [Line Items]
Net sales attributable to CLARCOR												$ 46,837
Operating profit attributable to CLARCOR	[1]											17,677
Net earnings attributable to CLARCOR												$ 10,485
Diluted earnings per share, attributable to CLARCOR (in dollars per share)												$ 0.21
Transaction costs removal, amount												$ 3,035
Cost of inventory step up												1,368
Industrial Environmental Filtration [Member]
Business Acquisition [Line Items]
Net sales attributable to CLARCOR												15,422
Operating profit attributable to CLARCOR	[2]											8,814
Net earnings attributable to CLARCOR												$ 6,551
Diluted earnings per share, attributable to CLARCOR (in dollars per share)												$ 0.13
Transaction costs removal, amount												$ 2,089
Cost of inventory step up												4,342
As Reported [Member]
Business Acquisition [Line Items]
Net sales												1,512,854
Operating profit												210,428
Net earnings attributable to CLARCOR Inc.												$ 144,084
Diluted earnings per share (in dollars per share)												$ 2.83

[1] Includes adjustments to remove transaction costs of $3,035 and cost of sales related to the step-up of inventory to its estimated acquisition-date fair value of $1,368, which have been pushed back to the twelve months ended November 30, 2013 for pro forma presentation. Also includes adjustments to intangible asset amortization, depreciation expense and interest expense.

[2] Includes adjustments to remove transaction costs of $2,089 and cost of sales related to the step-up of inventory to its estimated acquisition-date fair value of $4,342, which have been pushed back to the twelve months ended November 30, 2013 for pro forma presentation. Also includes adjustments to intangible asset amortization, depreciation expense and interest expense.