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Network
004031 - Disclosure - Goodwill and Intangible Assets (Acquired Intangible Assets) (Details)
(http://www.mmm.com/role/DisclosureGoodwillAndIntangibleAssetsAcquiredIntangibleAssetsDetails)
TableSchedule of Acquired Finite-Lived Intangible Asset by Major Class [Table]
Slicers (applies to each fact value in each table cell)
Reporting Entity [Axis]0000066740 (http://www.sec.gov/CIK)
Acquired intangible assets disclosuresPeriod [Axis]
2013-12-31
2012-12-31
Acquired Finite-Lived Intangible Assets by Major Class [Axis]Acquired Finite-Lived Intangible Assets by Major Class [Axis]
Patents [Member]Other Intangible Assets [Member]Finite-Lived Intangible Assets, Major Class Name [Domain]Patents [Member]Other Intangible Assets [Member]Finite-Lived Intangible Assets, Major Class Name [Domain]
Total gross carrying amount
602,000,000  
2,445,000,000  
3,047,000,000  
596,000,000  
2,456,000,000  
3,052,000,000  
Total accumulated amortization
(458,000,000) 
(1,030,000,000) 
(1,488,000,000) 
(421,000,000) 
(833,000,000) 
(1,254,000,000) 
Total finite-lived intangible assets - net
 
 
 
 
1,559,000,000  
 
 
 
 
 
1,798,000,000  
 
Non-amortizable intangible assets (primarily tradenames)
 
 
129,000,000  
 
 
127,000,000  
Total intangible assets - net
 
 
 
 
1,688,000,000  
 
 
 
 
 
1,925,000,000