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Significant Accounting Policies (Tables)
 12 Months Ended
Dec. 31, 2010
Significant Accounting Policies  
Earnings per share

 

(Amounts in millions, except per share amounts)

 

2010

 

2009

 

2008

 

Numerator:

 

 

 

 

 

 

 

Net income attributable to 3M

 

$

4,085

 

$

3,193

 

$

3,460

 

Denominator:

 

 

 

 

 

 

 

Denominator for weighted average 3M common shares outstanding — basic

 

713.7

 

700.5

 

699.2

 

Dilution associated with the Company’s stock-based compensation plans

 

11.8

 

6.2

 

8.0

 

Denominator for weighted average 3M common shares outstanding — diluted

 

725.5

 

706.7

 

707.2

 

Earnings per share attributable to 3M common shareholders — basic

 

$

5.72

 

$

4.56

 

$

4.95

 

Earnings per share attributable to 3M common shareholders — diluted

 

$

5.63

 

$

4.52

 

$

4.89