Statements of Consolidated Income (USD $) In Millions, except Share data in Thousands, unless otherwise specified	3 Months Ended				6 Months Ended
	Jun. 30, 2013		Jun. 30, 2012		Jun. 30, 2013		Jun. 30, 2012
Net sales	$ 328.9		$ 345.2		$ 666.3		$ 710.6
Cost of products sold:
Cost of products sold, excluding depreciation and amortization and other items	261.5		284.4		525.1		582.5
Unrealized losses (gains) on derivative instruments	4.2		0.1		4.9		(3.0)
Depreciation and amortization	7.0		6.6		14.0		12.9
Selling, administrative, research and development, and general (includes accumulated other comprehensive income reclassifications related to VEBA adjustments of $1.4 and $1.8 for the quarters ended June 30, 2013 and June 30, 2012, respectively, and $2.8 and $3.6 for the six months ended June 30, 2013 and June 30, 2012, respectively)	16.1		14.4		32.2		32.3
Other operating charges, net	0		0.1		0		0.1
Total costs and expenses	288.8		305.6		576.2		624.8
Operating income	40.1		39.6		90.1		85.8
Other (expense) income:
Interest expense	(9.0)		(6.5)		(18.3)		(10.6)
Other (expense) income, net (includes accumulated other comprehensive income reclassifications for realized gains on available for sale securities of $0.2 and $0.6 for the quarter and six months ended June 30, 2013, respectively)	(0.8)		1.1		0.2		1.8
Income before income taxes	30.3		34.2		72.0		77.0
Income tax provision (includes aggregate income tax expense from reclassification items of $(0.4) and $(0.7) for the quarters ended June 30, 2013 and June 30, 2012, respectively, and $(0.8) and $(1.4) for the six months ended June 30, 2013 and June 30, 2012, respectively)	(11.7)		(13.2)		(19.9)		(29.5)
Net income	$ 18.6		$ 21.0		$ 52.1		$ 47.5
Earnings per common share, Basic:
Net income per share	$ 0.99		$ 1.10		$ 2.73		$ 2.49
Earnings per common share, Diluted:
Net income per share	$ 0.98		$ 1.09		$ 2.70		$ 2.48
Weighted-average number of common shares outstanding (in thousands):
Basic	18,742	[1]	19,137	[1]	19,027	[1]	19,087	[1]
Diluted	18,945	[1]	19,200	[1]	19,256	[1]	19,170	[1]

[1] The basic weighted-average number of common shares outstanding during the period excludes unvested share-based payment awards. The diluted weighted-average number of common shares outstanding during the period is calculated using the treasury method.