3M CO | 2013 | FY | 3


(Millions)         
Marketable securities – auction rate securities only 2013 2012 2011
Beginning balance  $ 7 $ 4 $ 7
Total gains or losses:         
 Included in earnings       
 Included in other comprehensive income    4   3   (3)
Purchases, issuances, and settlements       
Transfers in and/or out of Level 3       
Ending balance (December 31)    11   7   4
           
Change in unrealized gains or losses for the period included in         
 earnings for securities held at the end of the reporting period      

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