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Shareholders' Equity (Tables) | 9 Months Ended
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Sep. 28, 2018
Equity [Abstract] |
Summary Of Stock-Based Compensation Expense, Net Of Tax | The following table summarizes stock-based compensation expense for the third quarter and first three quarters of fiscal 2018 and 2017:
| Third Quarter of |  | First Three Quarters of
| 2018 |  | 2017 |  | 2018 |  | 2017
(In millions) |  |  |  |  |  |  |
Cost of sales | $ | 1.1 |  |  | $ | 1.1 |  |  | $ | 3.3 |  |  | $ | 2.8 |
Research and development | 3.9 |  |  | 2.7 |  |  | 10.2 |  |  | 7.7 |
Sales and marketing | 2.5 |  |  | 2.4 |  |  | 7.2 |  |  | 7.0 |
General and administrative | 11.3 |  |  | 9.9 |  |  | 32.4 |  |  | 27.5 |
Total operating expense | 17.7 |  |  | 15.0 |  |  | 49.8 |  |  | 42.2 |
Total stock-based compensation expense | $ | 18.8 |  |  | $ | 16.1 |  |  | $ | 53.1 |  |  | $ | 45.0 |

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- Definition Tabular disclosure of the allocation of equity-based compensation costs to a given line item on the balance sheet and income statement for the period. This may include the reporting line for the costs and the amount capitalized and expensed. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (h)(1) -URI http://asc.fasb.org/extlink&oid=109197908&loc=d3e5070-113901 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SAB Topic 14.F) -URI http://asc.fasb.org/extlink&oid=115993241&loc=d3e301413-122809 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=109197908&loc=d3e5047-113901 + Details
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