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Cash and Investments | 3 Months Ended
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Dec. 01, 2016
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 |  | December 1, 2016 |  | September 1, 2016
|  | 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 |  | $ | 3,923 |  |  | $ | — |  |  | $ | — |  |  | $ | 3,923 |  |  | $ | 2,258 |  |  | $ | — |  |  | $ | — |  |  | $ | 2,258 |
Level 1(2) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Money market funds |  | 82 |  |  | — |  |  | — |  |  | 82 |  |  | 1,507 |  |  | — |  |  | — |  |  | 1,507 |
Level 2(3) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Certificates of deposit |  | 134 |  |  | 3 |  |  | — |  |  | 137 |  |  | 373 |  |  | 33 |  |  | — |  |  | 406 |
Corporate bonds |  | — |  |  | 14 |  |  | 71 |  |  | 85 |  |  | — |  |  | 142 |  |  | 235 |  |  | 377 |
Government securities |  | — |  |  | 13 |  |  | 63 |  |  | 76 |  |  | 2 |  |  | 62 |  |  | 82 |  |  | 146 |
Asset-backed securities |  | — |  |  | — |  |  | 21 |  |  | 21 |  |  | — |  |  | 12 |  |  | 97 |  |  | 109 |
Commercial paper |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | 9 |  |  | — |  |  | 9 |
|  | $ | 4,139 |  |  | $ | 30 |  |  | $ | 155 |  |  | $ | 4,324 |  |  | $ | 4,140 |  |  | $ | 258 |  |  | $ | 414 |  |  | $ | 4,812 |
(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 analysis to validate information obtained from these pricing services. No adjustments were made to such pricing information as of December 1, 2016.
Proceeds from sales of available-for-sale securities for the first quarters of 2017 and 2016 were $512 million and $407 million, respectively. Gross realized gains and losses from sales of available-for-sale securities were not material for any period presented. As of December 1, 2016, there were no available-for-sale securities that had been in a loss position for longer than 12 months. As of December 1, 2016 and September 1, 2016, we also had certificates of deposit classified as restricted cash (included in other noncurrent assets) of $2 million and $59 million, respectively, valued using Level 2 fair value measurements.

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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 No definition available. + Details
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