Earnings Per Share (Tables)

3 Months Ended

Mar. 31, 2012

Earnings Per Share [Abstract]

Calculation of Basic and Diluted Earnings Per Share

The calculation of basic and diluted earnings per share for each period presented was as follows (dollars and shares in millions, except per share amounts):

	Three Months Ended March 31,
	2012		2011
Net income	$	134.0	$	109.5
Average shares outstanding (basic)		246.1		244.7
Common stock equivalents		1.8		2.2
Incremental shares from assumed conversion of convertible debentures		–		5.2
Diluted shares		247.9		252.1
Basic earnings per share	$	0.54	$	0.45
Diluted earnings per share	$	0.54	$	0.43