Quarterly report pursuant to Section 13 or 15(d)

Marketable Securities (Details)

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Marketable Securities (Details) (USD $)
 3 Months Ended 9 Months Ended 12 Months Ended
Mar. 31, 2014
Mar. 31, 2013
Mar. 31, 2014
Mar. 31, 2013
Jun. 30, 2013
Marketable Securities          
Amortized Cost $ 2,906,342,000   $ 2,906,342,000   $ 2,750,942,000
Gross Unrealized Gains 3,951,000   3,951,000   3,071,000
Gross Unrealized Losses (969,000)   (969,000)   (4,002,000)
Fair Value 2,909,324,000   2,909,324,000   2,750,011,000
Add: Time deposits 31,011,000 [1]   31,011,000 [1]   43,413,000 [1]
Less: Cash Equivalents, Amortized Cost 689,740,000   689,740,000   859,933,000
Cash Equivalents, Gross Unrealized Gains     0   0
Cash Equivalents, Gross Unrealized Losses     (6,000)   0
Less: Cash Equivalents, Fair Value 689,734,000   689,734,000   859,933,000
Marketable Securities, Gross Unrealized Gains     3,951,000   3,071,000
Marketable Securities, Gross Unrealized Losses     (963,000)   (4,002,000)
Contractual Maturities of Securities [Abstract]          
Due within one year, Amortized Cost 725,478,000   725,478,000    
Due after one year through three years, Amortized Cost 1,522,135,000   1,522,135,000    
Marketable Securities, Amortized Cost 2,247,613,000   2,247,613,000   1,934,422,000
Due within one year, Fair Value 726,799,000   726,799,000    
Due after one year through three years, Fair Value 1,523,802,000   1,523,802,000    
Marketable Securities, Fair Value 2,250,601,000   2,250,601,000   1,933,491,000
Available-for-sale Securities, Gross Realized Gains 300,000 700,000 1,800,000 2,100,000  
U.S. Treasury securities
          
Marketable Securities          
Amortized Cost 302,408,000   302,408,000   93,940,000
Gross Unrealized Gains 112,000   112,000   53,000
Gross Unrealized Losses (95,000)   (95,000)   (206,000)
Fair Value 302,425,000   302,425,000   93,787,000
U.S. Government agency securities
          
Marketable Securities          
Amortized Cost 797,451,000   797,451,000   598,471,000
Gross Unrealized Gains 656,000   656,000   569,000
Gross Unrealized Losses (464,000)   (464,000)   (1,009,000)
Fair Value 797,643,000   797,643,000   598,031,000
Municipal securities
          
Marketable Securities          
Amortized Cost 101,846,000   101,846,000   103,686,000
Gross Unrealized Gains 120,000   120,000   71,000
Gross Unrealized Losses (72,000)   (72,000)   (302,000)
Fair Value 101,894,000   101,894,000   103,455,000
Corporate debt securities
          
Marketable Securities          
Amortized Cost 1,178,548,000   1,178,548,000   1,103,438,000
Gross Unrealized Gains 3,025,000   3,025,000   2,353,000
Gross Unrealized Losses (321,000)   (321,000)   (2,466,000)
Fair Value 1,181,252,000   1,181,252,000   1,103,325,000
Money market and other
          
Marketable Securities          
Amortized Cost 463,828,000   463,828,000   817,608,000
Gross Unrealized Gains 0   0   0
Gross Unrealized Losses 0   0   0
Fair Value 463,828,000   463,828,000   817,608,000
Sovereign securities
          
Marketable Securities          
Amortized Cost 62,261,000   62,261,000   33,799,000
Gross Unrealized Gains 38,000   38,000   25,000
Gross Unrealized Losses (17,000)   (17,000)   (19,000)
Fair Value $ 62,282,000   $ 62,282,000   $ 33,805,000
[1] Time deposits excluded from fair value measurements.