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Share-Based Compensation - Share-Based Compensation and Related Tax Benefit Recognized in Condensed Consolidated Statements of Operations (Detail) - USD ($) $ in Millions | 3 Months Ended
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Sep. 30, 2019 | Sep. 30, 2018
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items] |  |
Total | $ 11.2 | $ 16.7
Income tax benefit on share-based compensation | 0.9 | 2.7
Cost of Revenue [Member] |  |
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items] |  |
Total | 0.7 | 0.9
Research and Development [Member] |  |
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items] |  |
Total | 7.5 | 8.3
Selling, General, and Administrative [Member] |  |
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items] |  |
Total | $ 3.0 | $ 7.5

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