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Share-Based Compensation (Details) - USD ($) $ in Millions | 3 Months Ended |
--- | --- | ---
Jun. 30, 2018 | Jun. 30, 2017 | May 29, 2018
Stock-based compensation expense [Line Items] |  |  |
Allocated share-based compensation expense | $ 45.3 | $ 22.4 |
Income tax benefit | 10.1 | 7.4 |
Net income effect of share-based compensation | 35.2 | 15.0 |
Share-based compensation expense previously capitalized | 3.6 |  |
Inventory |  |  |
Stock-based compensation expense [Line Items] |  |  |
Income tax benefit | 3.5 | 2.7 |
Share-based compensation expense previously capitalized |  | 3.4 |
Cost of Sales |  |  |
Stock-based compensation expense [Line Items] |  |  |
Allocated share-based compensation expense | 3.6 | 3.4 |
Research and development |  |  |
Stock-based compensation expense [Line Items] |  |  |
Allocated share-based compensation expense | 14.1 | 10.3 |
Selling, General and Administrative |  |  |
Stock-based compensation expense [Line Items] |  |  |
Allocated share-based compensation expense | 11.7 | 8.7 |
Special charges and other, net |  |  |
Stock-based compensation expense [Line Items] |  |  |
Allocated share-based compensation expense | 15.9 | 0.0 |
New Accounting Pronouncement, Early Adoption, Effect | Accounting Standards Update 2016-09, Excess Tax Benefit Component |  |  |
Stock-based compensation expense [Line Items] |  |  |
Allocated share-based compensation expense | 5.0 | $ 5.9 |
Restricted Stock Units (RSUs) | Microsemi Corporation |  |  |
Stock-based compensation expense [Line Items] |  |  |
Allocated share-based compensation expense | 21.9 |  |
Consideration transferred, equity interests issued | 175.4 |  |
Compensation cost | 53.9 |  |
Compensation cost not yet recognized |  |  | $ 121.5
Accelerated compensation cost | 15.9 |  |
Restricted Stock Units (RSUs) | Microsemi Corporation | Inventory |  |  |
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://www.xbrl.org/2003/role/presentationRef -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=27013229&loc=d3e301413-122809 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5047-113901 Reference 3: http://www.xbrl.org/2003/role/presentationRef -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=96867065&loc=d3e5070-113901 + Details
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- Definition The amount of expense, net of income tax, 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 No definition available. + Details
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- Definition Amount of equity interests of the acquirer, including instruments or interests issued or issuable in consideration for the business combination. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 30 -Section 30 -Paragraph 7 -URI http://asc.fasb.org/extlink&oid=6911251&loc=d3e6578-128477 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 30 -Section 30 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=6911251&loc=d3e6613-128477 + Details
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