Condensed Statements of Income (USD $) In Millions, except Per Share data	3 Months Ended		9 Months Ended
	Sep. 30, 2011	Sep. 30, 2010	Sep. 30, 2011	Sep. 30, 2010
Condensed Statements of Income [Abstract]
Sales	$ 550.2	$ 432.8	$ 1,515.3	$ 1,200.5
Operating expenses:
Cost of goods sold	432.7	366.5	1,205.6	1,026.7
Selling and administration	39.8	33.3	121.8	101.3
Restructuring charges	4.1	0	6.6	0
Other operating income	4.3	0.3	5.9	2.6
Operating income	77.9	33.3	187.2	75.1
Earnings of non-consolidated affiliates	0.8	11.6	8.5	22.8
Interest expense	7.9	6.4	22.5	19.5
Interest income	0.2	0.3	0.7	0.7
Other (expense) income	(1.6)	0	179.0	0.1
Income before taxes	69.4	38.8	352.9	79.2
Income tax provision	22.2	7.0	129.9	16.4
Net income	$ 47.2	$ 31.8	$ 223.0	$ 62.8
Net income per common share:
Basic	$ 0.59	$ 0.40	$ 2.79	$ 0.79
Diluted	$ 0.58	$ 0.40	$ 2.76	$ 0.79
Dividends per common share	$ 0.20	$ 0.20	$ 0.60	$ 0.60
Average common shares outstanding:
Basic	80.2	79.4	79.9	79.1
Diluted	80.8	80.2	80.8	79.8