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Summary Of Significant Accounting Policies (Details) (USD $)
In Millions, unless otherwise specified
12 Months Ended
Nov. 30, 2014
Nov. 30, 2013
Nov. 30, 2012
Summary Of Significant Accounting Policies [Line Items]      
Amortization period of intangible assets (in years) 13 years    
Capitalized software $ 11.7us-gaap_CapitalizedComputerSoftwareNet $ 16.7us-gaap_CapitalizedComputerSoftwareNet $ 20.5us-gaap_CapitalizedComputerSoftwareNet
Shipping and handling expense 100.3us-gaap_ShippingHandlingAndTransportationCosts 96.9us-gaap_ShippingHandlingAndTransportationCosts 94.8us-gaap_ShippingHandlingAndTransportationCosts
Research and development expense 62.0us-gaap_ResearchAndDevelopmentExpense 61.3us-gaap_ResearchAndDevelopmentExpense 57.8us-gaap_ResearchAndDevelopmentExpense
Brand marketing support costs 226.6mkc_BrandMarketingSupportCosts 207.8mkc_BrandMarketingSupportCosts 198.3mkc_BrandMarketingSupportCosts
Advertising expense $ 100.4us-gaap_AdvertisingExpense $ 85.0us-gaap_AdvertisingExpense $ 86.2us-gaap_AdvertisingExpense
Minimum [Member] | Buildings [Member]      
Summary Of Significant Accounting Policies [Line Items]      
Estimated useful lives (in years) 20 years    
Minimum [Member] | Machinery, Equipment And Computer Software [Member]      
Summary Of Significant Accounting Policies [Line Items]      
Estimated useful lives (in years) 3 years    
Minimum [Member] | Software [Member]      
Summary Of Significant Accounting Policies [Line Items]      
Amortization period of intangible assets (in years) 3 years    
Maximum [Member] | Buildings [Member]      
Summary Of Significant Accounting Policies [Line Items]      
Estimated useful lives (in years) 40 years    
Maximum [Member] | Machinery, Equipment And Computer Software [Member]      
Summary Of Significant Accounting Policies [Line Items]      
Estimated useful lives (in years) 12 years    
Maximum [Member] | Software [Member]      
Summary Of Significant Accounting Policies [Line Items]      
Amortization period of intangible assets (in years) 8 years