Earnings Per Share (Tables)

12 Months Ended

Dec. 31, 2012

Earnings Per Share [Abstract]

Computation of Basic and Diluted Earnings Per Share

The table below presents the computation of basic and diluted earnings per share:

	Year Ended December 31,
	2012		2011		2010
	(in millions, except per share amounts)
Net earnings attributable to Allergan, Inc.	$	1,098.8	$	934.5	$	0.6
Weighted average number of shares outstanding	301.5		304.4		303.4
Net shares assumed issued using the treasury stock method for options and non-vested equity shares and share units outstanding during each period based on average market price	5.6		5.5		4.3
Dilutive effect of assumed conversion of convertible notes outstanding	—		0.3		0.3
Diluted shares	307.1		310.2		308.0
Earnings per share attributable to Allergan, Inc. stockholders:
Basic	$	3.64	$	3.07	$	0.00
Diluted	$	3.58	$	3.01	$	0.00