Per Share Information

3 Months Ended

Mar. 31, 2013

Earnings Per Share Disclosures [Abstract]

Per Share Information

Note 10. Per Share Information

The following table sets forth the computation of basic and diluted net income per common share:

		Three Months Ended
(in millions, except per share amounts):		March 31,
		2013		2012
Numerator for basic net income per common share -
	Net income attributable to ATI	$	10.0	$	56.2
Effect of dilutive securities:
	4.25% Convertible Notes due 2014		-		2.3
Numerator for diluted net income per common share -
	Net income available to ATI after assumed conversions	$	10.0	$	58.5
Denominator for basic net income per
	common share-weighted average shares		106.6		105.9
Effect of dilutive securities:
	Share-based compensation		0.5		0.9
	4.25% Convertible Notes due 2014		-		9.6
Denominator for diluted net income per
	common share – adjusted weighted average shares
	assuming conversions		107.1		116.4
Basic net income attributable to ATI per common share		$	0.09	$	0.53
Diluted net income attributable to ATI per common share		$	0.09	$	0.50

Common stock that would be issuable upon the assumed conversion of the 2014 Convertible Notes and other option equivalents and contingently issuable shares are excluded from the computation of contingently issuable shares, and therefore, from the denominator for diluted earnings per share, if the effect of inclusion is anti-dilutive. Excluded shares for the three month period ended March 31, 2013 were 9.6 million shares. There were no anti-dilutive shares for the period ended March 31, 2012.