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Business Segment and Geographic Information (Tables) | 3 Months Ended
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Mar. 31, 2021
Segment Reporting [Abstract] |
Schedule of Revenue from External Customers by Geographic Areas | The table below sets forth revenues by our two primary geographical markets, the United States and outside of the United States, based on the geographic location to which we deliver the components. The majority of our long-lived assets are located in the United States.
| Three Months Ended March 31, 2021 |  | Three Months Ended March 31, 2020
(Dollars in millions) | Amount |  | % of Total |  | Amount |  | % of Total
United States | $ | 381.2 |  |  | 75 | % |  | $ | 292.3 |  |  | 72 | %
Outside of the United States | 123.8 |  |  | 25 | % |  | 112.8 |  |  | 28 | %
Total | $ | 505.0 |  |  | 100 | % |  | $ | 405.1 |  |  | 100 | %
Schedule of Disaggregation of Revenue | The following table sets forth revenues by major sales channel for the periods shown:
| Three Months Ended March 31, 2021 |  | Three Months Ended March 31, 2020
(Dollars in millions) | Amount |  | % of Total |  | Amount |  | % of Total
Distributor | $ | 390.7 |  |  | 77 | % |  | $ | 286.1 |  |  | 71 | %
Direct | 114.3 |  |  | 23 | % |  | 119.0 |  |  | 29 | %
Total | $ | 505.0 |  |  | 100 | % |  | $ | 405.1 |  |  | 100 | %

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