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Acquired Intangibles and Goodwill (Tables) | 6 Months Ended
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Dec. 31, 2017
Goodwill And Intangible Assets Disclosure [Abstract] |
Summary of Life, Gross Carrying Value and Related Accumulated Amortization of Acquired Intangible Assets | The following table summarizes the life, the gross carrying value and the related accumulated amortization of our acquired intangible assets as of December 31, 2017 and June 30, 2017 (in millions):
|  | Weighted Average Life in Years |  |  | December 31, 2017 |  |  | June 30, 2017 |
Display driver technology |  |  | 5.3 |  |  | $ | 164.0 |  |  | $ | 164.0 |
Audio and video technology |  |  | 5.0 |  |  |  | 147.0 |  |  |  | - |
Customer relationships |  |  | 3.6 |  |  |  | 73.1 |  |  |  | 48.4 |
Fingerprint authentication technology |  |  | 4.0 |  |  |  | 55.7 |  |  |  | 63.5 |
Licensed technology and other |  |  | 4.3 |  |  |  | 9.0 |  |  |  | 1.3 |
Tradename |  |  | 7.0 |  |  |  | 4.8 |  |  |  | - |
Patents |  |  | 7.7 |  |  |  | 4.6 |  |  |  | 4.8 |
Backlog |  |  | 0.5 |  |  |  | 1.5 |  |  |  | - |
Acquired intangibles, gross |  |  | 4.8 |  |  |  | 459.7 |  |  |  | 282.0 |
Accumulated amortization |  |  |  |  |  |  | (196.2 | ) |  |  | (181.0 | )
Acquired intangibles, net |  |  |  |  |  | $ | 263.5 |  |  | $ | 101.0 |
Schedule of Expected Annual Aggregate Amortization Expense | The following table presents expected annual fiscal year aggregate amortization expense as of December 31, 2017 (in millions):
Remainder of 2018 |  | $ | 45.5 |
2019 |  |  | 78.8 |
2020 |  |  | 55.3 |
2021 |  |  | 42.5 |
2022 |  |  | 31.3 |
2023 |  |  | 6.3 |
Thereafter |  |  | 3.8 |
Future amortization |  | $ | 263.5 |
Schedule of Changes in Goodwill | Goodwill represents the excess of the purchase price over the fair value of net tangible and identifiable intangible assets acquired. Changes in our goodwill balance for the three months ended December 31, 2017 were as follows (in millions):
Beginning balance |  | $ | 206.8 |
Acquisition activity |  |  | 157.3 |
Post-acquisition adjustments |  |  | 4.2 |
Ending balance |  | $ | 368.3 |

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- Definition Tabular disclosure of assets, excluding financial assets and goodwill, lacking physical substance with a finite life, by either major class or business segment. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275 Reference 2: 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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