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Stock-Based Compensation | 9 Months Ended
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Jan. 29, 2016
Disclosure of Compensation Related Costs, Share-based Payments [Abstract] |
Stock-Based Compensation | Stock-Based Compensation Under the fair value recognition provisions of U.S. GAAP for accounting for stock-based compensation, the Company measures stock-based compensation expense at the grant date based on the fair value of the award and recognizes the compensation expense over the requisite service period, which is generally the vesting period. The following table presents the components and classification of stock-based compensation expense recognized for the three and nine months ended January 29, 2016 and January 23, 2015:
| Three months ended |  | Nine months ended
(in millions) | January 29, 2016 |  | January 23, 2015 |  | January 29, 2016 |  | January 23, 2015
Stock options | $ | 43 |  |  | $ | 7 |  |  | $ | 162 |  |  | $ | 27 |
Restricted stock awards | 33 |  |  | 24 |  |  | 113 |  |  | 78 |
Employee stock purchase plan | 5 |  |  | 2 |  |  | 15 |  |  | 10 |
Total stock-based compensation expense | $ | 81 |  |  | $ | 33 |  |  | $ | 290 |  |  | $ | 115 |
Cost of products sold | $ | 12 |  |  | $ | 4 |  |  | $ | 38 |  |  | $ | 12 |
Research and development expense | 8 |  |  | 5 |  |  | 28 |  |  | 20 |
Selling, general, and administrative expense | 47 |  |  | 24 |  |  | 162 |  |  | 83 |
Restructuring charges, net | 2 |  |  | — |  |  | 16 |  |  | — |
Acquisition-related items | 12 |  |  | — |  |  | 46 |  |  | — |
Total stock-based compensation expense | $ | 81 |  |  | $ | 33 |  |  | $ | 290 |  |  | $ | 115 |
Income tax benefits | (23 | ) |  | (8 | ) |  | (86 | ) |  | (31 | )
Total stock-based compensation expense, net of tax | $ | 58 |  |  | $ | 25 |  |  | $ | 204 |  |  | $ | 84 |

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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 40 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6418621&loc=d3e17540-113929 Reference 2: 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=51659978&loc=d3e25284-112666 Reference 3: 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 4: 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 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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