Financial Instruments And Fair Value Measurements (Narrative) (Details) (USD $)		3 Months Ended
	Mar. 31, 2012	Mar. 31, 2012 Maximum [Member] D	Mar. 31, 2012 Minimum [Member] D	Mar. 31, 2012 Auction Rate Securities [Member]		Jun. 30, 2011 Auction Rate Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cumulative impairment losses, investments				$ 17,100,000		$ 16,300,000
Auction rate securities, interest rate setting interval (in days)		35	7
Cumulative other-than-temporary impairment losses, investments				10,000,000		10,000,000
Cumulative other-than-temporary impairment losses, investments, recorded in AOCI	7,100,000
Cumulative temporary impairment losses and non-credit-based other-than-temporary impairment losses, investments, recorded in other comprehensive income, net of tax	4,400,000
Other than temporary impairment losses				$ 10,000,000	[1]	$ 10,000,000	[1]

[1] The amounts in this column were recorded in the condensed consolidated statement of operations before the fiscal year ending June 30, 2012.