Quarterly report pursuant to Section 13 or 15(d)

Fair Value Measurements (Details)

v2.3.0.15
Fair Value Measurements (Details) (USD $)
 1 Months Ended 12 Months Ended
Feb. 29, 2008
Jun. 30, 2010
Sep. 30, 2011
Jun. 30, 2011
Fair Value Measurements [Abstract]        
Cash excluded from fair value measurement     $ 156,800,000 $ 165,900,000
Time deposits excluded from fair value measurement     45,117,000 [1] 65,402,000 [1]
Auction Rate Securities, Contractual Maturity Date Range, Low   20    
Auction Rate Securities, Contractual Maturity Date Range, High   30    
Auction Failure 48,200,000      
Available-for-sale Securities, Sold at Par   16,800,000    
Total
        
Fair Value Measurements        
Marketable securities     1,898,230,000 [2] 1,807,277,000 [3]
Derivative assets     845,000 1,970,000
Executive Deferred Savings Plan        
EDSP money market and other     4,967,000 1,806,000
EDSP mutual funds     110,923,000 126,227,000
Executive Deferred Savings Plan     115,890,000 128,033,000
Total Financial Assets     2,014,965,000 [2] 1,937,280,000 [3]
Derivative liabilities     (6,054,000) (2,127,000)
Total Financial Liabilities     (6,054,000) (2,127,000)
Total | Money market and other
        
Fair Value Measurements        
Cash Equivalents     578,442,000 481,770,000
Total | US Treasury securities
        
Fair Value Measurements        
Cash Equivalents       4,400,000
Marketable securities     71,186,000 54,496,000
Total | US Government agency securities
        
Fair Value Measurements        
Cash Equivalents       6,010,000
Marketable securities     344,132,000 314,173,000
Total | Municipal securities
        
Fair Value Measurements        
Marketable securities     40,338,000 38,957,000
Total | Corporate debt securities
        
Fair Value Measurements        
Cash Equivalents       21,982,000
Marketable securities     831,721,000 853,403,000
Total | Sovereign securities
        
Fair Value Measurements        
Marketable securities     32,411,000 32,086,000
Level 1
        
Fair Value Measurements        
Marketable securities     999,948,000 [2] 869,045,000 [3]
Derivative assets     0 0
Executive Deferred Savings Plan        
EDSP money market and other     4,967,000 1,806,000
EDSP mutual funds     85,709,000 95,971,000
Executive Deferred Savings Plan     90,676,000 97,777,000
Total Financial Assets     1,090,624,000 [2] 966,822,000 [3]
Derivative liabilities     0 0
Total Financial Liabilities     0 0
Level 1 | Money market and other
        
Fair Value Measurements        
Cash Equivalents     578,442,000 481,770,000
Level 1 | US Treasury securities
        
Fair Value Measurements        
Cash Equivalents       0
Marketable securities     65,387,000 52,396,000
Level 1 | US Government agency securities
        
Fair Value Measurements        
Cash Equivalents       6,010,000
Marketable securities     342,734,000 314,173,000
Level 1 | Municipal securities
        
Fair Value Measurements        
Marketable securities     0 0
Level 1 | Corporate debt securities
        
Fair Value Measurements        
Cash Equivalents       0
Marketable securities     0 0
Level 1 | Sovereign securities
        
Fair Value Measurements        
Marketable securities     13,385,000 14,696,000
Level 2
        
Fair Value Measurements        
Marketable securities     898,282,000 [2] 938,232,000 [3]
Derivative assets     845,000 1,970,000
Executive Deferred Savings Plan        
EDSP money market and other     0 0
EDSP mutual funds     25,214,000 30,256,000
Executive Deferred Savings Plan     25,214,000 30,256,000
Total Financial Assets     924,341,000 [2] 970,458,000 [3]
Derivative liabilities     (6,054,000) (2,127,000)
Total Financial Liabilities     (6,054,000) (2,127,000)
Level 2 | Money market and other
        
Fair Value Measurements        
Cash Equivalents     0 0
Level 2 | US Treasury securities
        
Fair Value Measurements        
Cash Equivalents       4,400,000
Marketable securities     5,799,000 2,100,000
Level 2 | US Government agency securities
        
Fair Value Measurements        
Cash Equivalents       0
Marketable securities     1,398,000 0
Level 2 | Municipal securities
        
Fair Value Measurements        
Marketable securities     40,338,000 38,957,000
Level 2 | Corporate debt securities
        
Fair Value Measurements        
Cash Equivalents       21,982,000
Marketable securities     831,721,000 853,403,000
Level 2 | Sovereign securities
        
Fair Value Measurements        
Marketable securities     $ 19,026,000 $ 17,390,000
[1] Time deposits excluded from fair value measurements.
[2] Excludes cash of $156.8 million held in operating accounts and time deposits of $45.1 million as of September 30, 2011.
[3] Excludes cash of $165.9 million held in operating accounts and time deposits of $65.4 million as of June 30, 2011.