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Goodwill And Intangible Assets (Changes In The Carrying Amount Of Goodwill) (Details) (USD $)
In Millions, unless otherwise specified
12 Months Ended
Nov. 30, 2014
Nov. 30, 2013
Nov. 30, 2012
Goodwill [Roll Forward]      
Beginning of year     $ 1,695.3us-gaap_Goodwill
End of year 1,722.2us-gaap_Goodwill 1,798.5us-gaap_Goodwill 1,695.3us-gaap_Goodwill
Consumer Segment [Member]      
Goodwill [Roll Forward]      
Beginning of year 1,654.7us-gaap_Goodwill
/ us-gaap_StatementBusinessSegmentsAxis
= mkc_ConsumerSegmentMember
1,551.0us-gaap_Goodwill
/ us-gaap_StatementBusinessSegmentsAxis
= mkc_ConsumerSegmentMember
 
Changes in purchase price allocation (6.1)us-gaap_GoodwillPurchaseAccountingAdjustments
/ us-gaap_StatementBusinessSegmentsAxis
= mkc_ConsumerSegmentMember
0us-gaap_GoodwillPurchaseAccountingAdjustments
/ us-gaap_StatementBusinessSegmentsAxis
= mkc_ConsumerSegmentMember
 
Goodwill acquired 0us-gaap_GoodwillAcquiredDuringPeriod
/ us-gaap_StatementBusinessSegmentsAxis
= mkc_ConsumerSegmentMember
77.9us-gaap_GoodwillAcquiredDuringPeriod
/ us-gaap_StatementBusinessSegmentsAxis
= mkc_ConsumerSegmentMember
 
Foreign currency fluctuations and other (67.5)us-gaap_GoodwillTranslationAdjustments
/ us-gaap_StatementBusinessSegmentsAxis
= mkc_ConsumerSegmentMember
25.8us-gaap_GoodwillTranslationAdjustments
/ us-gaap_StatementBusinessSegmentsAxis
= mkc_ConsumerSegmentMember
 
End of year 1,581.1us-gaap_Goodwill
/ us-gaap_StatementBusinessSegmentsAxis
= mkc_ConsumerSegmentMember
1,654.7us-gaap_Goodwill
/ us-gaap_StatementBusinessSegmentsAxis
= mkc_ConsumerSegmentMember
 
Industrial Segment [Member]      
Goodwill [Roll Forward]      
Beginning of year 143.8us-gaap_Goodwill
/ us-gaap_StatementBusinessSegmentsAxis
= mkc_IndustrialSegmentMember
144.3us-gaap_Goodwill
/ us-gaap_StatementBusinessSegmentsAxis
= mkc_IndustrialSegmentMember
 
Changes in purchase price allocation 0us-gaap_GoodwillPurchaseAccountingAdjustments
/ us-gaap_StatementBusinessSegmentsAxis
= mkc_IndustrialSegmentMember
0us-gaap_GoodwillPurchaseAccountingAdjustments
/ us-gaap_StatementBusinessSegmentsAxis
= mkc_IndustrialSegmentMember
 
Goodwill acquired 0us-gaap_GoodwillAcquiredDuringPeriod
/ us-gaap_StatementBusinessSegmentsAxis
= mkc_IndustrialSegmentMember
0us-gaap_GoodwillAcquiredDuringPeriod
/ us-gaap_StatementBusinessSegmentsAxis
= mkc_IndustrialSegmentMember
 
Foreign currency fluctuations and other (2.7)us-gaap_GoodwillTranslationAdjustments
/ us-gaap_StatementBusinessSegmentsAxis
= mkc_IndustrialSegmentMember
(0.5)us-gaap_GoodwillTranslationAdjustments
/ us-gaap_StatementBusinessSegmentsAxis
= mkc_IndustrialSegmentMember
 
End of year $ 141.1us-gaap_Goodwill
/ us-gaap_StatementBusinessSegmentsAxis
= mkc_IndustrialSegmentMember
$ 143.8us-gaap_Goodwill
/ us-gaap_StatementBusinessSegmentsAxis
= mkc_IndustrialSegmentMember