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Cash and Investments | 3 Months Ended
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Nov. 30, 2017
Investments [Abstract] |
Cash and Investments | Cash and Investments Cash and equivalents and the fair values of our available-for-sale investments, which approximated amortized costs, were as follows:
As of |  | November 30, 2017 |  | August 31, 2017
|  | Cash and Equivalents |  | Short-term Investments |  | Long-term Marketable Investments(1) |  | Total Fair Value |  | Cash and Equivalents |  | Short-term Investments |  | Long-term Marketable Investments(1) |  | Total Fair Value
Cash |  | $ | 1,850 |  |  | $ | — |  |  | $ | — |  |  | $ | 1,850 |  |  | $ | 2,237 |  |  | $ | — |  |  | $ | — |  |  | $ | 2,237 |
Level 1(2) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Money market funds |  | 3,971 |  |  | — |  |  | — |  |  | 3,971 |  |  | 2,332 |  |  | — |  |  | — |  |  | 2,332 |
Level 2(3) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Corporate bonds |  | 3 |  |  | 96 |  |  | 156 |  |  | 255 |  |  | — |  |  | 193 |  |  | 315 |  |  | 508 |
Certificates of deposit |  | 169 |  |  | 7 |  |  | 3 |  |  | 179 |  |  | 483 |  |  | 24 |  |  | 3 |  |  | 510 |
Government securities |  | 5 |  |  | 45 |  |  | 65 |  |  | 115 |  |  | 1 |  |  | 90 |  |  | 126 |  |  | 217 |
Asset-backed securities |  | — |  |  | 13 |  |  | 90 |  |  | 103 |  |  | — |  |  | 2 |  |  | 173 |  |  | 175 |
Commercial paper |  | 10 |  |  | 5 |  |  | — |  |  | 15 |  |  | 56 |  |  | 10 |  |  | — |  |  | 66 |
|  | 6,008 |  |  | $ | 166 |  |  | $ | 314 |  |  | $ | 6,488 |  |  | 5,109 |  |  | $ | 319 |  |  | $ | 617 |  |  | $ | 6,045 |
Restricted cash(4) |  | 122 |  |  |  |  |  |  |  |  | 107 |  |  |  |  |  |  |
Cash, cash equivalents, and restricted cash |  | $ | 6,130 |  |  |  |  |  |  |  |  | $ | 5,216 |  |  |  |  |  |  |
(1) | The maturities of long-term marketable securities range from one to four years.
(2) | The fair value of Level 1 securities is measured based on quoted prices in active markets for identical assets.
(3) | The fair value of Level 2 securities is measured using information obtained from pricing services, which obtain quoted market prices for similar instruments, non-binding market consensus prices that are corroborated by observable market data, or various other methodologies, to determine the appropriate value at the measurement date. We perform supplemental analyses to validate information obtained from these pricing services. No adjustments were made to the fair values indicated by such pricing information as of November 30, 2017 or August 31, 2017.
(4) | Restricted cash is included in other noncurrent assets and primarily represents balances related to the MMJ Creditor Payments and interest reserve balances related to the 2021 MSTW Term Loan.
Gross realized gains and losses from sales of available-for-sale securities were not material for any period presented. As of November 30, 2017, there were no available-for-sale securities that had been in a loss position for longer than 12 months.

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- Definition The entire disclosure of cash, cash equivalents, and debt and equity securities, including any unrealized or realized gain (loss). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 305 -URI http://asc.fasb.org/topic&trid=2122426 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -URI http://asc.fasb.org/topic&trid=2196928 + Details
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