Earnings Per Common Share

12 Months Ended

Dec. 31, 2011

Earnings Per Common Share [Abstract]

Earnings Per Common Share

5. Earnings per Common Share

Earnings per share ("EPS") is computed under the two-class method, which requires nonvested share-based payment awards that have non-forfeitable rights to dividend or dividend equivalents to be treated as a separate class of securities in calculating EPS. Participating securities include nonvested restricted stock and units, nonvested shares or units under the management stock purchase program, and certain other nonvested stock-based awards.

EPS is computed using the following common share information for the following years ended December 31:

	2011		2010		2009
(dollars and shares in millions)
EPS Numerator:
Net income attributable to common shareholders	$	328.0	$	509.2	$	460.1
Less: Income allocated to participating securities		6.1		5.5		5.0
Net income available to common shareholders	$	321.9	$	503.7	$	455.1
EPS Denominator:
Weighted average common shares outstanding		85.8		93.4		97.7
Dilutive common share equivalents from share-based compensation plans		1.5		1.2		1.3
Weighted average common and common equivalent shares outstanding, assuming dilution		87.3		94.6		99.0