Employee Benefit Plans (Narrative) (Details) (USD $) In Millions	3 Months Ended
	Sep. 30, 2011	Jun. 30, 2011
Employee Benefit Plans [Abstract]
Reduction in retiree medical liability	$ 3.5	$ 7.0
Reduction in accumulated other comprehensive income (loss)	2.0
Reduction in employee insurance expense	$ 5.5