Earnings per Share and Shareholders' Equity Transactions (Tables)

9 Months Ended

Sep. 30, 2011

Earnings Per Share And Shareholders' Equity Transactions [Abstract]

Information Regarding Basic And Diluted Earnings Per Share

	Three Months Ended September 30,					Nine Months Ended September 30,
(in millions, except per share data)	2011		2010			2011		2010
Basic shares used in the calculation of earnings per share		45.3		44.9			45.4		45.7
Dilutive effect of securities:
Employee stock options		—		0.3			—		0.3
Non-vested stock grants		—		0.5			—		0.4
Diluted shares used in the calculation of earnings per share		45.3		45.7			45.4		46.4
Per share effect of dilutive securities on income (loss) from continuing operations	$	—	$	(0.02	)	$	—	$	(0.03	)
Per share effect of dilutive securities on net income (loss)	$	—	$	(0.01	)	$	—	$	(0.03	)