Net Earnings Per Share (Tables)

9 Months Ended

Sep. 30, 2012

Net Earnings Per Share

Summary of net earnings per share

	Three months ended September 30,				Nine months ended September 30,
	2012		2011		2012		2011
	(in millions, except per share amounts)
Net earnings attributable to common stockholders	$	403.3	$	330.9	$	1,378.0	$	1,100.3
Basic earnings per common share:
Weighted average common shares outstanding		62.8		69.4		64.2		70.7
Net earnings attributable to common stockholders	$	6.43	$	4.77	$	21.47	$	15.55
Diluted earnings per common share:
Weighted average common shares outstanding		62.8		69.4		64.2		70.7
Dilutive common shares—stock options		0.7		0.5		0.8		0.7
Diluted weighted average shares outstanding		63.5		69.9		65.0		71.4
Net earnings attributable to common stockholders	$	6.35	$	4.73	$	21.19	$	15.41