Quarterly report pursuant to Section 13 or 15(d)

Marketable Securities (Details)

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Marketable Securities (Details) (USD $)
In Thousands, unless otherwise specified
3 Months Ended 12 Months Ended
Sep. 30, 2012
Jun. 30, 2012
Marketable Securities    
Amortized Cost $ 2,462,268 $ 2,341,750
Gross Unrealized Gains 8,113 5,070
Gross Unrealized Losses (195) (762)
Fair Value 2,470,186 2,346,058
Add: Time deposits 56,534 [1] 62,431 [1]
Less: Cash Equivalents, Amortized Cost 598,585 625,339
Cash Equivalents, Gross Unrealized Gains 0 0
Cash Equivalents, Gross Unrealized Losses 0 0
Cash Equivalents, Net of Unrealized Gains and Losses 598,585 625,339
Marketable Securities, Gross Unrealized Gains 8,113 5,070
Marketable Securities, Gross Unrealized Losses (195) (762)
Contractual Maturities of Securities [Abstract]    
Due within one year, Amortized Cost 457,709  
Due after one year through three years, Amortized Cost 1,462,508  
Marketable Securities, Amortized Cost 1,920,217 1,778,842
Due within one year, Fair Value 458,759  
Due after one year through three years, Fair Value 1,469,376  
Marketable Securities, Fair Value 1,928,135 1,783,150
U.S. Treasury securities
   
Marketable Securities    
Amortized Cost 77,149 91,387
Gross Unrealized Gains 152 67
Gross Unrealized Losses 0 (16)
Fair Value 77,301 91,438
U.S. Government agency securities
   
Marketable Securities    
Amortized Cost 653,108 633,587
Gross Unrealized Gains 1,385 981
Gross Unrealized Losses (16) (76)
Fair Value 654,477 634,492
Municipal securities
   
Marketable Securities    
Amortized Cost 66,685 66,538
Gross Unrealized Gains 124 107
Gross Unrealized Losses (17) (102)
Fair Value 66,792 66,543
Corporate debt securities
   
Marketable Securities    
Amortized Cost 1,099,330 914,134
Gross Unrealized Gains 6,357 3,826
Gross Unrealized Losses (161) (568)
Fair Value 1,105,526 917,392
Money market and other
   
Marketable Securities    
Amortized Cost 538,499 607,038
Gross Unrealized Gains 0 0
Gross Unrealized Losses 0 0
Fair Value 538,499 607,038
Sovereign securities
   
Marketable Securities    
Amortized Cost 27,497 29,056
Gross Unrealized Gains 95 89
Gross Unrealized Losses (1) 0
Fair Value 27,591 29,145
Equity securities
   
Marketable Securities    
Amortized Cost   10
Gross Unrealized Gains   0
Gross Unrealized Losses   0
Fair Value   $ 10
[1] Time deposits excluded from fair value measurements.