CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2011
CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS)
Net income	$ 146.5	$ 121.6	$ 71.7
Other comprehensive income (loss), net of tax
Pension and post-retirement benefits, net of tax of $(48.3), $78.5, and $(71.5), respectively	80.5	(126.4)	116.8
Net (loss) gain on derivative instruments, net of tax of $5.3, $21.6, and $(3.1), respectively	(8.7)	(35.4)	5.0
Unrealized gain (loss) on marketable securities, net of tax of $(0.2), $0.1, and $(0.1) respectively	0.3	(0.2)
Foreign currency translation	5.0	(18.6)	16.5
Other comprehensive income (loss), net of tax	77.1	(180.6)	138.3
Comprehensive income (loss), net of tax	223.6	(59.0)	210.0
Less: Comprehensive income (loss) attributable to the noncontrolling interest	0.7	(1.0)	1.2
Comprehensive income (loss) attributable to Carpenter	$ 222.9	$ (58.0)	$ 208.8