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Equity Plans | 3 Months Ended
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Nov. 28, 2013
Disclosure Text Block [Abstract] |
Equity Plans | Equity Plans As of November 28, 2013, we had an aggregate of 140 million shares of common stock reserved for the issuance of stock options and restricted stock awards, of which 67 million shares were subject to outstanding awards and 73 million shares were available for future awards. Awards are subject to terms and conditions as determined by our Board of Directors. Stock Options We granted 2 million and 4 million stock options during the first quarters of 2014 and 2013, respectively, with weighted-average grant-date fair values per share of $7.58 and $2.99, respectively. The fair values of option awards were estimated at each grant date using the Black-Scholes option valuation model. The Black-Scholes model requires the input of assumptions, including the expected stock-price volatility and estimated option life. The expected volatilities utilized were based on implied volatilities from traded options on our stock and on historical volatility. The expected lives of options granted were based, in part, on historical experience and on the terms and conditions of the options. The risk-free interest rates utilized were based on the U.S. Treasury yield in effect at each grant date. No dividends were assumed in estimated option values. Assumptions used in the Black-Scholes model are presented below:
Quarter Ended |  | November 28, 2013 |  | November 29, 2012
Average expected life in years |  | 4.8 |  |  | 5.0 |
Weighted-average expected volatility |  | 50 | % |  | 62 | %
Weighted-average risk-free interest rate |  | 1.3 | % |  | 0.7 | %
Restricted Stock and Restricted Stock Units ("Restricted Stock Awards") As of November 28, 2013, there were 10 million shares of Restricted Stock Awards outstanding, of which 1 million were performance-based Restricted Stock Awards. For service-based Restricted Stock Awards, restrictions generally lapse in one-fourth increments during each year of employment after the grant date. For performance-based Restricted Stock Awards, vesting is contingent upon meeting certain performance goals. Restricted Stock Awards granted for the first quarters of 2014 and 2013 were as follows:
Quarter ended |  | November 28, 2013 |  | November 29, 2012
Service-based awards |  | 1 |  |  | 2 |
Performance-based awards |  | 1 |  |  | 1 |
Weighted-average grant-date fair values per share |  | $ | 17.31 |  |  | $ | 5.73 |
Stock-based Compensation Expense
Quarter ended |  | November 28, 2013 |  | November 29, 2012
Stock-based compensation expense by caption: |  |  |  |
Cost of goods sold |  | $ | 7 |  |  | $ | 6 |
Selling, general and administrative |  | 11 |  |  | 9 |
Research and development |  | 4 |  |  | 4 |
|  | $ | 22 |  |  | $ | 19 |
Stock-based compensation expense by type of award: |  |  |  |
Stock options |  | $ | 14 |  |  | $ | 13 |
Restricted stock awards |  | 8 |  |  | 6 |
|  | $ | 22 |  |  | $ | 19 |
As of November 28, 2013, $166 million of total unrecognized compensation costs, net of estimated forfeitures, related to non-vested awards was expected to be recognized through the first quarter of 2018, resulting in a weighted-average period of 1.3 years. Stock-based compensation expense in the above presentation does not reflect any significant income tax benefits, which is consistent with our treatment of income or loss from our U.S. operations. (See "Income Taxes" note.)

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- Definition The entire disclosure for compensation-related costs for equity-based compensation, which may include disclosure of policies, compensation plan details, allocation of equity compensation, incentive distributions, equity-based arrangements to obtain goods and services, deferred compensation arrangements, employee stock ownership plan details and employee stock purchase plan details. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5047-113901 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 50 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6406099&loc=d3e25284-112666 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 40 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6418621&loc=d3e17540-113929 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5444-113901 Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Staff Accounting Bulletin (SAB) -Number Topic 14 + Details
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