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Subsequent Events (Details) (USD $)
In Millions, unless otherwise specified
12 Months Ended 3 Months Ended 1 Months Ended 1 Months Ended
Jun. 30, 2012
Jul. 02, 2011
Jun. 30, 2012
1% senior convertible notes
Jul. 02, 2011
1% senior convertible notes
Jul. 03, 2010
1% senior convertible notes
Jun. 05, 2006
1% senior convertible notes
Sep. 30, 2012
1% senior convertible notes
Estimate
Aug. 31, 2012
Subsequent event
Gen Comm Co., Ltd ("GenComm")
Aug. 17, 2012
Subsequent event
Gen Comm Co., Ltd ("GenComm")
Jul. 31, 2012
Subsequent event
1% senior convertible notes
Jul. 02, 2012
Subsequent event
1% senior convertible notes
Subsequent Events                      
Principal amount of debt repurchased     $ 14.0             $ 50.0  
Interest rate on Senior convertible notes (as a percent)     1.00% 1.00% 1.00% 1.00%         1.00%
Cash paid for repurchase of debt 13.2 0.2 13.9             49.8  
Loss on extinguishment of debt 0.7   0.7       2.1        
Total purchase price                 15.0    
First holdback payment                 3.5    
Minimum holdback period one               18 months      
Second holdback payment                 $ 0.5    
Minimum holdback period two               60 months