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Acquired Intangible Assets - Calculation Of Acquired Intangibles By Asset Class (Details) - USD ($) $ in Thousands | 3 Months Ended |
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Sep. 30, 2018 | Jun. 30, 2018
Finite-Lived Intangible Assets, Net [Abstract] |  |
Cost | $ 2,286,960 | $ 2,333,736
Accumulated Amortization | (1,083,676) | (1,037,099)
Total | 1,203,284 | 1,296,637
Technology assets |  |
Finite-Lived Intangible Assets, Net [Abstract] |  |
Cost | 985,226 | 985,226
Accumulated Amortization | (487,251) | (439,774)
Total | $ 497,975 | 545,452
Weighted-average amortization period (in years) for acquired intangible assets | 6 years |
Customer assets |  |
Finite-Lived Intangible Assets, Net [Abstract] |  |
Cost | $ 1,301,734 | 1,348,510
Accumulated Amortization | (596,425) | (597,325)
Total | 705,309 | $ 751,185
Intangible assets fully amortized during the period | $ 46,800 |
Weighted-average amortization period (in years) for acquired intangible assets | 8 years |

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- Definition Weighted average amortization period of finite-lived intangible assets acquired either individually or as part of a group of assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 1 -Subparagraph (a)(3) -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16265-109275 + Details
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