DMC Pension Plan (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2013 DMC [Member]	Jan. 02, 2011 DMC [Member]	Jan. 02, 2011 DMC [Member] Initial estimate [Member]	Jan. 02, 2011 DMC [Member] Revised estimate [Member]
Amounts included in the consolidated balance sheet [Abstract]
Accumulated other comprehensive income (loss), net of tax	$ (11.5)	$ (49.2)
Unfunded pension liability	187.7	269.9
Amounts included in the consolidated balance sheet	176.2	220.7
Assumptions used to determine the projected benefit obligation, discount rate	4.93%	4.40%
Components of net pension plan expense (credit) [Abstract]
Interest cost on projected benefit obligation	46.9	52.1	25.5
Expected return on assets	(62.3)	(57.2)	(27.6)
Total net pension plan expense (credits)	(15.4)	(5.1)	(2.1)
Assumptions used to determine the net periodic pension plan expense (credits), discount rate	4.40%	5.57%	5.35%
Assumptions used to determine the net periodic pension plan expense (credits), expected long-term of return on plan assets	7.50%	7.50%	7.50%
Pension benefit obligation					255.2	228.0	255.2
Other plan administration adjustment	27.2	0		27.2
Increase in goodwill acquired				16.9
Increase in noncurrent deferred tax assets acquired				10.3
Changes in accumulated other comprehensive income	61.7
Changes in accumulated other comprehensive income, net of tax	37.7
Accumulated other comprehensive income (loss), before tax	(18.9)
Accumulated other comprehensive income (loss), net of tax	$ (11.5)	$ (49.2)
Assumptions used to determine the projected benefit obligation, discount rate	4.93%	4.40%