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Business Acquisitions (Tables) | 12 Months Ended
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Mar. 31, 2018
Atmel Corporation |
Business Acquisition [Line Items] |
Schedule of Recognized Identified Assets Acquired and Liabilities Assumed | The table below represents the allocation of the final purchase price to the net assets acquired based on their estimated fair values, as well as the associated estimated useful lives of the acquired intangible assets (amounts in millions).
Assets acquired |  |
Cash and cash equivalents |  | $ | 230.2 |
Accounts receivable |  | 141.4 |
Inventories |  | 335.1 |
Prepaid expenses and other current assets |  | 28.4 |
Assets held for sale |  | 32.0 |
Property, plant and equipment |  | 129.9 |
Goodwill |  | 1,286.4 |
Purchased intangible assets |  | 1,888.4 |
Long-term deferred tax assets |  | 46.7 |
Other assets |  | 7.5 |
Total assets acquired |  | 4,126.0 |
Liabilities assumed |  |
Accounts payable |  | (55.7 | )
Other current liabilities |  | (121.0 | )
Long-term line of credit |  | (192.0 | )
Deferred tax liabilities |  | (27.5 | )
Long-term income tax payable |  | (115.1 | )
Other long-term liabilities |  | (141.7 | )
Total liabilities assumed |  | (653.0 | )
Purchase price allocated |  | $ | 3,473.0 |
Schedule of Finite-Lived Intangible Assets Acquired as Part of Business Combination |
Purchased Intangible Assets | Weighted Average |  |
| Useful Life |  | April 4, 2016
| (in years) |  | (in millions)
Core and developed technology | 11 |  | $ | 1,075.0 |
In-process research and development | — |  | 140.7 |
Customer-related | 6 |  | 630.6 |
Backlog | 1 |  | 40.3 |
Other | 5 |  | 1.8 |
Total purchased intangible assets |  |  | $ | 1,888.4 |
Micrel Incorporated |
Business Acquisition [Line Items] |
Schedule of Recognized Identified Assets Acquired and Liabilities Assumed | The table below represents the allocation of the purchase price to the net assets acquired based on their estimated fair values as of August 3, 2015, as well as the associated estimated useful lives of the acquired intangible assets at that date. The purchase price allocation was finalized as of June 30, 2016 (amounts in millions):
Assets acquired |
Cash and cash equivalents | $ | 99.1 |
Accounts receivable, net | 14.0 |
Inventories | 73.5 |
Prepaid expenses and other current assets | 10.7 |
Property, plant and equipment, net | 38.5 |
Goodwill | 441.0 |
Purchased intangible assets | 273.5 |
Other assets | 4.3 |
Total assets acquired | 954.6 |
Liabilities assumed |
Accounts payable | (11.1 | )
Other current liabilities | (31.6 | )
Deferred tax liabilities | (88.0 | )
Long-term income tax payable | (7.6 | )
Other long-term liabilities | (0.1 | )
Total liabilities assumed | (138.4 | )
Purchase price allocated | $ | 816.2 |
Schedule of Finite-Lived Intangible Assets Acquired as Part of Business Combination |
Purchased Intangible Assets | Weighted Average |  |
| Useful Life |  | August 3, 2015
| (in years) |  | (in millions)
Core and developed technology | 10 |  | $ | 175.8 |
In-process research and development | — |  | 21.0 |
Customer-related | 5 |  | 71.1 |
Backlog | 1 |  | 5.6 |
Total purchased intangible assets |  |  | $ | 273.5 |

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- Definition Tabular disclosure of finite-lived intangible assets acquired as part of a business combination or through an asset purchase, by major class and in total, including the value of the asset acquired, any significant residual value (the expected value of the asset at the end of its useful life) and the weighted-average amortization period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16265-109275 + Details
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- Definition Tabular disclosure of the amounts recognized as of the acquisition date for each major class of assets acquired and liabilities assumed. May include but not limited to the following: (a) acquired receivables; (b) contingencies recognized at the acquisition date; and (c) the fair value of noncontrolling interests in the acquiree. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=84161108&loc=d3e4845-128472 + Details
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