EARNINGS PER SHARE

12 Months Ended

Dec. 31, 2011

EARNINGS PER SHARE

EARNINGS PER SHARE

4. EARNINGS PER SHARE

        The numerator for basic and diluted earnings per share is net earnings attributable to shareholders reduced by dividends and undistributed earnings attributable to unvested shares. The denominator for basic earnings per share is the weighted-average number of shares outstanding during the period. The denominator for diluted earnings per share is the weighted-average shares outstanding adjusted for the effect of dilutive stock options and performance share awards.

        The following table presents the calculation of basic and diluted earnings per share:

	Years Ended December 31,
(In millions, except per share data)	2011			2010			2009
Basic earnings per share:
Weighted-average shares outstanding		204.3			204.7			200.6
Net earnings attributable to shareholders	$	508.5		$	452.7		$	399.6
Dividends and undistributed earnings attributable to unvested shares		(1.4	)		(1.4	)		(0.7	)
Net earnings attributable to shareholders used for basic earnings per share calculation	$	507.1		$	451.3		$	398.9
Net earnings attributable to shareholders per share	$	2.48		$	2.20		$	1.99
Diluted earnings per share:
Weighted-average shares outstanding		204.3			204.7			200.6
Incremental shares outstanding assuming the exercise/vesting of dilutive stock options/performance share awards		0.7			0.4			0.1
Weighted-average shares—diluted		205.0			205.1			200.7
Net earnings attributable to shareholders	$	508.5		$	452.7		$	399.6
Dividends and undistributed earnings attributable to unvested shares		(1.4	)		(1.4	)		(0.7	)
Net earnings attributable to shareholders used for diluted earnings per share calculation	$	507.1		$	451.3		$	398.9
Net earnings attributable to shareholders per share	$	2.47		$	2.20		$	1.99

        Potential shares outstanding were 2.9 million, 2.3 million and 1.7 million as of December 31, 2011, 2010 and 2009, respectively, of which 2.2 million, 1.9 million and 1.6 million were not included in the diluted earnings per share calculation for the years ended December 31, 2011, 2010 and 2009, respectively.