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Cash, Cash Equivalents and Short-Term Investments | 9 Months Ended
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Aug. 31, 2018
Cash, Cash Equivalents, and Short-term Investments [Abstract] |
CASH, CASH EQUIVALENTS AND SHORT-TERM INVESTMENTS | CASH, CASH EQUIVALENTS AND SHORT-TERM INVESTMENTS Cash equivalents consist of instruments with remaining maturities of three months or less at the date of purchase. We classify all of our cash equivalents and short-term investments as “available-for-sale.” In general, these investments are free of trading restrictions. We carry these investments at fair value, based on quoted market prices or other readily available market information. Unrealized gains and losses, net of taxes, are included in accumulated other comprehensive income, which is reflected as a separate component of stockholders’ equity in our condensed consolidated balance sheets. Gains and losses are recognized when realized in our condensed consolidated statements of income. When we have determined that an other-than-temporary decline in fair value has occurred, the amount of the decline that is related to a credit loss is recognized in income. Gains and losses are determined using the specific identification method. Cash, cash equivalents and short-term investments consisted of the following as of August 31, 2018 (in thousands):
| Amortized Cost |  | Unrealized Gains |  | Unrealized Losses |  | Estimated Fair Value
Current assets: |  |  |  |  |  |  |
Cash | $ | 386,927 |  |  | $ | — |  |  | $ | — |  |  | $ | 386,927 |
Cash equivalents: |  |  |  |  |  |  |
Corporate debt securities | 24,012 |  |  | — |  |  | (1 | ) |  | 24,011 |
Money market mutual funds | 1,302,801 |  |  | — |  |  | — |  |  | 1,302,801 |
Time deposits | 33,405 |  |  | — |  |  | — |  |  | 33,405 |
Total cash equivalents | 1,360,218 |  |  | — |  |  | (1 | ) |  | 1,360,217 |
Total cash and cash equivalents | 1,747,145 |  |  | — |  |  | (1 | ) |  | 1,747,144 |
Short-term fixed income securities: |  |  |  |  |  |  |
Asset-backed securities | 77,393 |  |  | 2 |  |  | (385 | ) |  | 77,010 |
Corporate debt securities | 2,471,739 |  |  | 614 |  |  | (20,590 | ) |  | 2,451,763 |
Foreign government securities | 4,178 |  |  | — |  |  | (29 | ) |  | 4,149 |
Municipal securities | 19,223 |  |  | — |  |  | (306 | ) |  | 18,917 |
U.S. Treasury securities | 645,487 |  |  | — |  |  | — |  |  | 645,487 |
Total short-term investments | 3,218,020 |  |  | 616 |  |  | (21,310 | ) |  | 3,197,326 |
Total cash, cash equivalents and short-term investments | $ | 4,965,165 |  |  | $ | 616 |  |  | $ | (21,311 | ) |  | $ | 4,944,470 |
Cash, cash equivalents and short-term investments consisted of the following as of December 1, 2017 (in thousands):
| Amortized Cost |  | Unrealized Gains |  | Unrealized Losses |  | Estimated Fair Value
Current assets: |  |  |  |  |  |  |
Cash | $ | 280,488 |  |  | $ | — |  |  | $ | — |  |  | $ | 280,488 |
Cash equivalents: |  |  |  |  |  |  |  |  |
Money market mutual funds | 2,006,741 |  |  | — |  |  | — |  |  | 2,006,741 |
Time deposits | 18,843 |  |  | — |  |  | — |  |  | 18,843 |
Total cash equivalents | 2,025,584 |  |  | — |  |  | — |  |  | 2,025,584 |
Total cash and cash equivalents | 2,306,072 |  |  | — |  |  | — |  |  | 2,306,072 |
Short-term fixed income securities: |  |  |  |  |  |  |  |
Asset-backed securities | 98,403 |  |  | 1 |  |  | (403 | ) |  | 98,001 |
Corporate debt securities | 2,461,691 |  |  | 2,694 |  |  | (10,125 | ) |  | 2,454,260 |
Foreign government securities | 2,396 |  |  | — |  |  | (8 | ) |  | 2,388 |
Municipal securities | 21,189 |  |  | 8 |  |  | (132 | ) |  | 21,065 |
U.S. Treasury securities | 941,538 |  |  | 2 |  |  | (3,552 | ) |  | 937,988 |
Total short-term investments | 3,525,217 |  |  | 2,705 |  |  | (14,220 | ) |  | 3,513,702 |
Total cash, cash equivalents and short-term investments | $ | 5,831,289 |  |  | $ | 2,705 |  |  | $ | (14,220 | ) |  | $ | 5,819,774 |
See Note 4 for further information regarding the fair value of our financial instruments. The following table summarizes the fair value and gross unrealized losses related to available-for-sale securities, aggregated by investment category, that have been in an unrealized loss position for less than twelve months, as of August 31, 2018 and December 1, 2017 (in thousands):
| 2018 |  | 2017
| Fair Value |  | Gross Unrealized Losses |  | Fair Value |  | Gross Unrealized Losses
Corporate debt securities | $ | 1,218,367 |  |  | $ | (16,414 | ) |  | $ | 1,338,232 |  |  | $ | (5,459 | )
Asset-backed securities | 28,820 |  |  | (240 | ) |  | 64,618 |  |  | (193 | )
Municipal securities | 17,975 |  |  | (281 | ) |  | 11,805 |  |  | (115 | )
Foreign government securities | 4,149 |  |  | (29 | ) |  | 2,388 |  |  | (8 | )
U.S. Treasury securities | — |  |  | — |  |  | 593,296 |  |  | (2,087 | )
Total | $ | 1,269,311 |  |  | $ | (16,964 | ) |  | $ | 2,010,339 |  |  | $ | (7,862 | )
There were 767 securities and 894 securities in an unrealized loss position for less than twelve months at August 31, 2018 and at December 1, 2017, respectively. The following table summarizes the fair value and gross unrealized losses related to available-for-sale securities, aggregated by investment category, that were in a continuous unrealized loss position for more than twelve months, as of August 31, 2018 and December 1, 2017 (in thousands):
| 2018 |  | 2017
| Fair Value |  | Gross Unrealized Losses |  | Fair Value |  | Gross Unrealized Losses
Corporate debt securities | $ | 312,698 |  |  | $ | (4,176 | ) |  | $ | 500,689 |  |  | $ | (4,666 | )
Asset-backed securities | 17,560 |  |  | (145 | ) |  | 32,383 |  |  | (210 | )
Municipal securities | 942 |  |  | (25 | ) |  | 598 |  |  | (17 | )
U.S. Treasury securities | — |  |  | — |  |  | 338,950 |  |  | (1,465 | )
Total | $ | 331,200 |  |  | $ | (4,346 | ) |  | $ | 872,620 |  |  | $ | (6,358 | )
There were 197 securities and 360 securities in an unrealized loss position for more than twelve months at August 31, 2018 and at December 1, 2017, respectively. The following table summarizes the cost and estimated fair value of short-term fixed income securities classified as short-term investments based on stated effective maturities as of August 31, 2018 (in thousands):
| Amortized Cost |  | Estimated Fair Value
Due within one year | $ | 1,643,049 |  |  | $ | 1,640,836 |
Due between one and two years | 788,794 |  |  | 782,312 |
Due between two and three years | 608,978 |  |  | 600,690 |
Due after three years | 177,199 |  |  | 173,488 |
Total | $ | 3,218,020 |  |  | $ | 3,197,326 |
We review our debt securities classified as short-term investments on a regular basis to evaluate whether or not any security has experienced an other-than-temporary decline in fair value. We consider factors such as the length of time and extent to which the market value has been less than the cost, the financial condition and near-term prospects of the issuer and our intent to sell, or whether it is more likely than not we will be required to sell the investment before recovery of the investment’s amortized cost basis. If we believe that an other-than-temporary decline exists in one of these securities, we write down these investments to fair value. The portion of the write-down related to credit loss would be recorded to interest and other income, net in our condensed consolidated statements of income. Any portion not related to credit loss would be recorded to accumulated other comprehensive income, which is reflected as a separate component of stockholders’ equity in our condensed consolidated balance sheets. During the nine months ended August 31, 2018 and September 1, 2017, we did not consider any of our investments to be other-than-temporarily impaired.

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- Definition The entire disclosure of the components of cash, cash equivalents, and short-term investments. Short-term investments may include current marketable securities. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -URI http://asc.fasb.org/topic&trid=2196928 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 305 -URI http://asc.fasb.org/topic&trid=2122426 + Details
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