2. EARNINGS PER SHARE

Basic earnings per share is computed by dividing net earnings by the weighted average number of common shares outstanding. Diluted earnings per share is computed by dividing net earnings including the impact of dilutive adjustments by the weighted average number of common shares outstanding plus potentially dilutive shares, as if they had been issued at the earlier of the date of issuance or the beginning of the period presented. Potentially dilutive common shares result primarily from the Company's outstanding stock options, restricted stock awards, performance share awards, and shares issuable upon conversion of zero-coupon subordinated notes.

The following represents a reconciliation of basic earnings per share to diluted earnings per share:

	Three Months Ended June 30,												Six Months Ended June 30,
			2011						2010						2011						2010
					Per						Per						Per						Per
					Share						Share						Share						Share
	Income		Shares		Amount		Income		Shares		Amount		Income		Shares		Amount		Income		Shares		Amount
Basic earnings
per share:
Net earnings	$	122.9		100.6	$	1.22	$	153.7		103.5	$	1.48	$	250.0		100.4	$	2.49	$	286.4		104.0	$	2.75
Dilutive effect of
employee stock
options and awards		--		1.3				--		0.9				--		1.3				--		0.9
Effect of convertible
debt, net of tax		--		0.9				--		1.0				--		0.9				--		1.0
Diluted earnings
per share:
Net earnings
including impact of
dilutive adjustments	$	122.9		102.8	$	1.20	$	153.7		105.4	$	1.46	$	250.0		102.6	$	2.44	$	286.4		105.9	$	2.70

The following table summarizes the potential common shares not included in the computation of diluted earnings per share because their impact would have been antidilutive:

	Three Months Ended				Six Months Ended
	June 30,				June 30,
	2011		2010		2011		2010
Stock options		1.4		2.8		1.2		4.0