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Share-Based Compensation (Details) - USD ($) $ in Millions |  | 3 Months Ended
--- | --- | ---
May 29, 2018 | Jun. 30, 2019 | Jun. 30, 2018
Stock-based compensation expense [Line Items] |  |  |
Share based compensation expense |  | $ 40.7 | $ 45.3
Income tax benefit |  | 9.1 | 10.1
Net income effect of share-based compensation |  | 31.6 | 35.2
Awards assumed |  |  | 53.9
Cost of sales |  |  |
Stock-based compensation expense [Line Items] |  |  |
Share based compensation expense |  | 4.9 | 3.6
Research and development |  |  |
Stock-based compensation expense [Line Items] |  |  |
Share based compensation expense |  | 19.5 | 14.1
Selling, general and administrative |  |  |
Stock-based compensation expense [Line Items] |  |  |
Share based compensation expense |  | 16.3 | 11.7
Special charges and other, net |  |  |
Stock-based compensation expense [Line Items] |  |  |
Share based compensation expense |  | 0.0 | 15.9
Inventory |  |  |
Stock-based compensation expense [Line Items] |  |  |
Capitalized share-based compensation expense |  | 4.8 | 3.5
Share-based compensation expense previously capitalized |  | $ 4.9 | 3.6
Restricted Stock Units (RSUs) | Microsemi Corporation |  |  |
Stock-based compensation expense [Line Items] |  |  |
Share based compensation expense |  |  | 21.9
Awards assumed | $ 175.4 |  |
Compensation costs recognized | 53.9 |  |
Total compensation cost not yet recognized | $ 121.5 |  |
Accelerated compensation costs |  |  | 15.9
Restricted Stock Units (RSUs) | Inventory | Microsemi Corporation |  |  |
Stock-based compensation expense [Line Items] |  |  |
Income tax benefit |  |  | $ 0.4

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- Definition Represents the expense recognized during the period arising from equity-based compensation arrangements (for example, shares of stock, unit, stock options or other equity instruments) with employees, directors and certain consultants qualifying for treatment as employees. + References Reference 1: 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 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 2 -Subparagraph (h)(1)(i) -URI http://asc.fasb.org/extlink&oid=109197908&loc=d3e5070-113901 + Details
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