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Geographic and Segment Information (Tables) | 12 Months Ended
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Mar. 31, 2020
Segment Reporting [Abstract] |
Schedule of Net Sales and Gross Profit for Each Segment | The following table represents net sales and gross profit for each segment (in millions):
| Years ended March 31,
| 2020 |  | 2019 |  | 2018
| Net Sales |  | Gross Profit |  | Net Sales |  | Gross Profit |  | Net Sales |  | Gross Profit
Semiconductor products | $ | 5,177.3 |  |  | $ | 3,145.2 |  |  | $ | 5,217.1 |  |  | $ | 2,798.9 |  |  | $ | 3,876.0 |  |  | $ | 2,315.9 |
Technology licensing | 96.9 |  |  | 96.9 |  |  | 132.4 |  |  | 132.4 |  |  | 104.8 |  |  | 104.8 |
Total | $ | 5,274.2 |  |  | $ | 3,242.1 |  |  | $ | 5,349.5 |  |  | $ | 2,931.3 |  |  | $ | 3,980.8 |  |  | $ | 2,420.7 |
Schedule of Disclosure on Geographic Areas, Long-Lived Assets in Individual Foreign Countries by Country | Identifiable long-lived assets (consisting of property, plant and equipment net of accumulated amortization and ROU assets) by geographic area are as follows (in millions):
| March 31,
| 2020 |  | 2019
United States | $ | 515.0 |  |  | $ | 521.1 |
Thailand | 174.4 |  |  | 209.3 |
Various other countries | 306.2 |  |  | 266.3 |
Total long-lived assets (1) | $ | 995.6 |  |  | $ | 996.7 |
(1) The amounts presented for March 31, 2020 include ROU assets of $119.5 million due to the adoption of ASC 842, Leases, under the retrospective cumulative effect adjustment transition method. The disclosures are not applicable for the fiscal year ended March 31, 2019 (see Note 11, Leases, for further information).

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- Definition Tabular disclosure of the profit or loss and total assets for each reportable segment. An entity discloses certain information on each reportable segment if the amounts (a) are included in the measure of segment profit or loss reviewed by the chief operating decision maker or (b) are otherwise regularly provided to the chief operating decision maker, even if not included in that measure of segment profit or loss. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 22 -URI http://asc.fasb.org/extlink&oid=115929826&loc=d3e8736-108599 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 25 -URI http://asc.fasb.org/extlink&oid=115929826&loc=d3e8813-108599 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=108376223&loc=d3e13816-109267 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 21 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=115929826&loc=d3e8721-108599 Reference 5: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 30 -URI http://asc.fasb.org/extlink&oid=115929826&loc=d3e8906-108599 + Details
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