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Acquisitions, Divestitures and Licensing Transactions (Tables) | 12 Months Ended
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Dec. 31, 2019
Business Acquisition [Line Items] |
Schedule of Pro Forma Information | The following unaudited pro-forma consolidated results of operations for the years ended December 31, 2019 and December 31, 2018 have been prepared as if the acquisition of Quantenna had occurred on January 1, 2018 and includes adjustments for amortization of intangibles, interest expense from financing, restructuring, and the effect of purchase accounting adjustments including the step-up of inventory (in millions, except per share data):
| Year Ended |
| December 31, 2019 | December 31, 2018
Revenue | $ | 5,613.2 |  | $ | 6,098.8 |
Net income | 218.2 |  | 567.2 |
Net income attributable to ON Semiconductor Corporation | 216.0 |  | 564.7 |
Net income per common share attributable to ON Semiconductor Corporation: |  |  |  |
Basic | 0.53 |  | 1.33 |
Diluted | 0.52 |  | 1.30 |
Quantenna |
Business Acquisition [Line Items] |
Schedule of Purchase Price Allocation | The following table presents the allocation of the purchase price of Quantenna for the assets acquired and liabilities assumed based on their relative fair values, which has been finalized during the year ended December 31, 2019 (in millions):
|  |  |  | Purchase Price Allocation |
Cash and cash equivalents |  |  |  | $ | 133.4 |
Receivables |  |  |  | 22.2 |
Inventories |  |  |  | 41.8 |
Other current assets |  |  |  | 4.3 |
Property, plant and equipment |  |  |  | 16.9 |
Goodwill |  |  |  | 726.7 |
Intangible assets (excluding IPRD) |  |  |  | 87.1 |
IPRD |  |  |  | 23.8 |
Deferred tax assets |  |  |  | 29.2 |
Other non-current assets |  |  |  | 12.7 |
Total assets acquired |  |  |  | 1,098.1 |
Accounts payable |  |  |  | 22.6 |
Other current liabilities |  |  |  | 17.5 |
Deferred tax liabilities |  |  |  | 3.3 |
Other non-current liabilities |  |  |  | 15.4 |
Total liabilities assumed |  |  |  | 58.8 |
Net assets acquired/purchase price |  |  |  | $ | 1,039.3 |
SensL Technologies, Ltd. |
Business Acquisition [Line Items] |
Schedule of Purchase Price Allocation | The following table presents the allocation of the purchase price of SensL for the assets acquired and liabilities assumed based on their fair values (in millions):
|  |  |  | Purchase Price Allocation |
Current assets (including cash and cash equivalents of $0.7) |  |  |  | $ | 4.2 |
Property, plant and equipment and other non-current assets |  |  |  | 1.8 |
Goodwill |  |  |  | 18.9 |
Intangible assets (excluding IPRD) |  |  |  | 31.4 |
IPRD |  |  |  | 20.0 |
Total assets acquired |  |  |  | 76.3 |
Current liabilities |  |  |  | 0.7 |
Other non-current liabilities |  |  |  | 4.0 |
Total liabilities assumed |  |  |  | 4.7 |
Net assets acquired/purchase price |  |  |  | $ | 71.6 |

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