Earnings Per Share Computations (Tables)

12 Months Ended

Dec. 31, 2012

Earnings Per Share [Abstract]

Calculation of earnings per share

The calculation of earnings per share for common stock shown below excludes the income attributable to the participating securities from the numerator and excludes the dilutive impact of those awards from the denominator. 

(in millions, except per share amounts)	2012			2011			2010
Numerator
Net income attributable to Bemis Company, Inc.	$	173.8		$	184.1		$	205.1
Income allocated to participating securities	(1.8		)	(2.8		)	(3.7		)
Net income available to common shareholders (1)	$	172.0		$	181.3		$	201.4
Denominator
Weighted-average common shares outstanding — basic	103.2			104.6			108.7
Dilutive shares	0.7			0.4			0.1
Weighted-average common and common equivalent shares outstanding — diluted	103.9			105.0			108.8
Per common share income
Basic	$	1.67		$	1.73		$	1.85
Diluted	$	1.66		$	1.73		$	1.85
(1)   Basic weighted-average common shares outstanding	103.2			104.6			108.7
Basic weighted-average common shares outstanding and participating securities	104.3			106.2			110.7
Percentage allocated to common shareholders	98.9		%	98.5		%	98.2		%