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Geographic and Segment Information | 12 Months Ended
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Mar. 31, 2018
Segment Reporting [Abstract] |
Geographic and Segment Information | Geographic and Segment Information The Company's reporting segments include semiconductor products and technology licensing. The Company does not allocate operating expenses, interest income, interest expense, other income or expense, or provision for or benefit from income taxes to these segments for internal reporting purposes, as the Company does not believe that allocating these expenses is beneficial in evaluating segment performance. Additionally, the Company does not allocate assets to segments for internal reporting purposes as it does not manage its segments by such metrics. The following table represents revenues and gross profit for each segment (amounts in millions):
| Years ended March 31,
| 2018 |  | 2017 |  | 2016
| Net Sales |  | Gross Profit |  | Net Sales |  | Gross Profit |  | Net Sales |  | Gross Profit
Semiconductor products | $ | 3,876.0 |  |  | $ | 2,315.9 |  |  | $ | 3,316.6 |  |  | $ | 1,666.0 |  |  | $ | 2,084.2 |  |  | $ | 1,116.4 |
Technology licensing | 104.8 |  |  | 104.8 |  |  | 91.2 |  |  | 91.2 |  |  | 89.1 |  |  | 89.1 |
Total | $ | 3,980.8 |  |  | $ | 2,420.7 |  |  | $ | 3,407.8 |  |  | $ | 1,757.2 |  |  | $ | 2,173.3 |  |  | $ | 1,205.5 |
The Company sells its products to distributors and original equipment manufacturers (OEMs) in a broad range of market segments, performs on-going credit evaluations of its customers and, as deemed necessary, may require collateral, primarily letters of credit. The Company's operations outside the U.S. consist of product assembly and final test facilities in Thailand, and sales and support centers and design centers in certain foreign countries. Domestic operations are responsible for the design, development and wafer fabrication of products, as well as the coordination of production planning and shipping to meet worldwide customer commitments. The Company's Thailand assembly and test facility is reimbursed in relation to value added with respect to assembly and test operations and other functions performed, and certain foreign sales offices receive compensation for sales within their territory. Accordingly, for financial statement purposes, it is not meaningful to segregate sales or operating profits for the assembly and test and foreign sales office operations. Identifiable long-lived assets (consisting of property, plant and equipment net of accumulated amortization) by geographic area are as follows (amounts in millions):
| March 31,
| 2018 |  | 2017
United States | $ | 393.3 |  |  | $ | 388.5 |
Thailand | 215.5 |  |  | 178.0 |
Various other countries | 159.1 |  |  | 116.8 |
Total long-lived assets | $ | 767.9 |  |  | $ | 683.3 |
Sales to unaffiliated customers located outside the U.S., primarily in Asia and Europe, aggregated approximately 85% of consolidated net sales for fiscal 2018 and 84% for each of fiscal 2017 and 2016. Sales to customers in Europe represented approximately 24% of consolidated net sales for each of fiscal 2018 and 2017, and approximately 22% of consolidated net sales for fiscal 2016. Sales to customers in Asia represented approximately 58% of consolidated net sales for each of fiscal 2018 and 2017, and approximately 59% of consolidated net sales for fiscal 2016. Within Asia, sales into China, including Hong Kong, represented approximately 30%, 32% and 30% of consolidated net sales for fiscal 2018, 2017 and 2016, respectively. Sales into Taiwan represented approximately 11%, 9% and 12% of consolidated net sales for fiscal 2018, 2017 and 2016, respectively. Sales into any other individual foreign country did not exceed 10% of the Company's net sales for any of the three years presented. No single end customer or distributor accounted for 10% or more of the Company's net sales during fiscal 2018, 2017 or 2016.

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- Definition The entire disclosure for reporting segments including data and tables. Reportable segments include those that meet any of the following quantitative thresholds a) it's reported revenue, including sales to external customers and intersegment sales or transfers is 10 percent or more of the combined revenue, internal and external, of all operating segments b) the absolute amount of its reported profit or loss is 10 percent or more of the greater, in absolute amount of 1) the combined reported profit of all operating segments that did not report a loss or 2) the combined reported loss of all operating segments that did report a loss c) its assets are 10 percent or more of the combined assets of all operating segments. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -URI http://asc.fasb.org/topic&trid=2134510 + Details
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