FAIR VALUE MEASUREMENTS (Details) - USD ($)
$ in Thousands |
Apr. 30, 2017 |
Oct. 31, 2016 |
| Assets: |
|
|
| U.S. government obligations |
$ 364,631
|
|
| Fair value, Measurements, Recurring |
|
|
| Assets: |
|
|
| Money market funds |
474,476
|
$ 625,277
|
| U.S. government obligations |
344,661
|
350,431
|
| Commercial paper |
79,917
|
69,959
|
| Foreign currency forward contracts |
827
|
175
|
| Total assets measured at fair value |
899,881
|
1,045,842
|
| Liabilities: |
|
|
| Foreign currency forward contracts |
1,811
|
1,396
|
| Forward starting interest rate swap |
1,070
|
5,967
|
| Total liabilities measured at fair value |
2,881
|
7,363
|
| Fair value, Measurements, Recurring | Level 1 |
|
|
| Assets: |
|
|
| Money market funds |
474,476
|
625,277
|
| U.S. government obligations |
0
|
0
|
| Commercial paper |
0
|
0
|
| Foreign currency forward contracts |
0
|
0
|
| Total assets measured at fair value |
474,476
|
625,277
|
| Liabilities: |
|
|
| Foreign currency forward contracts |
0
|
0
|
| Forward starting interest rate swap |
0
|
0
|
| Total liabilities measured at fair value |
0
|
0
|
| Fair value, Measurements, Recurring | Level 2 |
|
|
| Assets: |
|
|
| Money market funds |
0
|
0
|
| U.S. government obligations |
344,661
|
350,431
|
| Commercial paper |
79,917
|
69,959
|
| Foreign currency forward contracts |
827
|
175
|
| Total assets measured at fair value |
425,405
|
420,565
|
| Liabilities: |
|
|
| Foreign currency forward contracts |
1,811
|
1,396
|
| Forward starting interest rate swap |
1,070
|
5,967
|
| Total liabilities measured at fair value |
2,881
|
7,363
|
| Fair value, Measurements, Recurring | Level 3 |
|
|
| Assets: |
|
|
| Money market funds |
0
|
0
|
| U.S. government obligations |
0
|
0
|
| Commercial paper |
0
|
0
|
| Foreign currency forward contracts |
0
|
0
|
| Total assets measured at fair value |
0
|
0
|
| Liabilities: |
|
|
| Foreign currency forward contracts |
0
|
0
|
| Forward starting interest rate swap |
0
|
0
|
| Total liabilities measured at fair value |
$ 0
|
$ 0
|