Per Share Information

12 Months Ended

Dec. 31, 2012

Earnings Per Share Disclosures [Abstract]

Per Share Information

Note 14. Per Share Information
The following table sets forth the computation of basic and diluted net income per common share:
(in millions, except per share amounts)
Years ended December 31,		2012		2011		2010
Numerator:
Numerator for basic net income per common share -
	Net income attributable to ATI	$	158.4	$	214.3	$	70.7
Effect of dilutive securities:
	4.25% Convertible Senior Notes due 2014		8.5		9.9		-
Numerator for diluted net income per common share -
	Net income attributable to ATI after assumed conversions	$	166.9	$	224.2	$	70.7
Denominator:
Denominator for basic net income per common share - weighted average shares			106.1		102.5		97.4
Effect of dilutive securities:
	Share-based compensation		0.9		1.8		1.3
	4.25% Convertible Senior Notes due 2014		9.6		9.6		-
Denominator for diluted net income per common share -
	adjusted weighted average shares and assumed conversions		116.6		113.9		98.7
Basic net income attributable to ATI per common share		$	1.49	$	2.09	$	0.73
Diluted net income attributable to ATI per common share		$	1.43	$	1.97	$	0.72

Common stock that would be issuable upon the assumed conversion of the 4.25% Convertible Senior Notes due 2014 and other option equivalents and contingently issuable shares were excluded from the computation of contingently issuable shares, and therefore, from the denominator for diluted earnings per share, if the effect of inclusion would have been anti-dilutive. Excluded shares for 2010 were 9.6 million.