Consolidated Statements Of Income (USD $) In Millions, except Per Share data	3 Months Ended
	Sep. 30, 2011	Sep. 30, 2010
Consolidated Statements Of Income [Abstract]
NET SALES	$ 414.1	$ 351.7
Cost of sales	333.0	301.9
Gross profit	81.1	49.8
Selling, general and administrative expenses	35.7	35.7
Acquisition related costs	1.4
Operating income	44.0	14.1
Interest expense	(7.0)	(4.2)
Other (expense) income, net	(0.7)	1.6
Income before income taxes	36.3	11.5
Income tax expense	12.6	3.9
Net income	23.7	7.6
Less: Net loss attributable to noncontrolling interest	0.1
NET INCOME ATTRIBUTABLE TO CARPENTER	$ 23.8	$ 7.6
EARNINGS PER COMMON SHARE:
Basic	$ 0.53	$ 0.17
Diluted	$ 0.53	$ 0.17
WEIGHTED AVERAGE COMMON SHARES OUTSTANDING:
Basic	44.3	44.1
Diluted	45.1	44.5
Cash dividends per common share	$ 0.18	$ 0.18