Condensed Statements of Income (USD $) In Millions, except Per Share data, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011
Income Statement [Abstract]
Sales	$ 581.2	$ 550.2	$ 1,597.1	$ 1,515.3
Operating expenses:
Cost of goods sold	475.8	432.7	1,260.1	1,205.6
Selling and administration	42.4	39.8	131.2	121.0
Restructuring charges	2.3	4.1	6.0	6.6
Acquisition costs	8.3	0	8.3	0.8
Other operating income	1.1	4.3	1.5	5.9
Operating income	53.5	77.9	193.0	187.2
Earnings of non-consolidated affiliates	1.2	0.8	2.0	8.5
Interest expense	6.0	7.9	18.3	22.5
Interest income	0.2	0.2	0.7	0.7
Other (expense) income	(2.2)	(1.6)	(6.9)	179.0
Income before taxes	46.7	69.4	170.5	352.9
Income tax provision	18.0	22.2	55.5	129.9
Net income	$ 28.7	$ 47.2	$ 115.0	$ 223.0
Net income per common share:
Basic	$ 0.36	$ 0.59	$ 1.44	$ 2.79
Diluted	$ 0.35	$ 0.58	$ 1.42	$ 2.76
Dividends per common share	$ 0.20	$ 0.20	$ 0.60	$ 0.60
Average common shares outstanding:
Basic	80.1	80.2	80.1	79.9
Diluted	81.0	80.8	80.9	80.8