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Components of Deferred Tax Assets and Liabilities (Detail) - USD ($) $ in Millions | Dec. 31, 2020 | Dec. 31, 2019
--- | --- | ---
Income Tax Disclosure [Abstract] |  |
Carry forward tax losses | $ 81.5 | $ 76.2
Employee stock based compensation | 27.6 | 25.9
Deferred revenues | 10.5 | 26.3
Other | 39.1 | 41.2
Deferred tax assets before valuation allowance | 158.7 | 169.6
Valuation allowance - mainly in respect to carryforward losses | (59.2) | (57.7)
Deferred tax asset | 99.5 | 111.9
Intangible assets | (21.0) | (16.9)
Undistributed earnings of subsidiary | (9.9) | (9.9)
Other | (14.2) | (10.2)
Deferred tax liability | (45.1) | (37.0)
Deferred tax asset, net | $ 54.4 | $ 74.9

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