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Marketable Securities - Amortized Cost and Fair Value (Details) - USD ($) $ in Thousands | 9 Months Ended |
--- | --- | ---
Mar. 31, 2018 | Jun. 30, 2017
Marketable Securities |  |  |
Amortized Cost |  | $ 2,301,536 | $ 2,674,437
Gross Unrealized Gains |  | 150 | 712
Gross Unrealized Losses |  | (15,521) | (5,225)
Fair Value |  | 2,286,165 | 2,669,924
Add: Time deposits | [1] | 50,658 | 39,389
Less: Cash equivalents, Amortized Cost |  | 702,530 | 845,639
Less: Cash equivalents, Gross Unrealized Gains |  | 0 | 0
Less: Cash equivalents, Gross Unrealized Losses |  | (7) | (15)
Less: Cash equivalents, Fair Value |  | 702,523 | 845,624
Marketable securities, Amortized Cost |  | 1,649,664 | 1,868,187
Marketable securities, Gross Unrealized Gains |  | 150 | 712
Marketable securities, Gross Unrealized Losses |  | (15,514) | (5,210)
Marketable securities, Fair Value |  | 1,634,300 | 1,863,689
Corporate debt securities |  |  |
Marketable Securities |  |  |
Amortized Cost |  | 905,363 | 1,120,548
Gross Unrealized Gains |  | 132 | 598
Gross Unrealized Losses |  | (8,414) | (1,951)
Fair Value |  | 897,081 | 1,119,195
Money market funds and other |  |  |
Marketable Securities |  |  |
Amortized Cost |  | 633,752 | 616,039
Gross Unrealized Gains |  | 0 | 0
Gross Unrealized Losses |  | 0 | 0
Fair Value |  | 633,752 | 616,039
Sovereign securities |  |  |
Marketable Securities |  |  |
Amortized Cost |  | 17,823 | 52,621
Gross Unrealized Gains |  | (1) | 0
Gross Unrealized Losses |  | (141) | (56)
Fair Value |  | 17,681 | 52,565
U.S. Government agency securities |  |  |
Marketable Securities |  |  |
Amortized Cost |  | 316,223 | 510,553
Gross Unrealized Gains |  | 14 | 62
Gross Unrealized Losses |  | (3,100) | (1,789)
Fair Value |  | 313,137 | 508,826
U.S. Treasury securities |  |  |
Marketable Securities |  |  |
Amortized Cost |  | 428,375 | 374,676
Gross Unrealized Gains |  | 5 | 52
Gross Unrealized Losses |  | (3,866) | (1,429)
Fair Value |  | $ 424,514 | $ 373,299
Corporate and Government securities |  |  |
Marketable Securities |  |  |
Investment portfolio, maximum maturity term |  | 3 years |
[1] | Time deposits excluded from fair value measurements.

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