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Share-Based Compensation (Tables)

12 Months Ended

Dec. 31, 2019

Share-based Payment Arrangement [Abstract]

Summary of Share-Based Compensation Expense

Total share-based compensation expense related to the Company's stock options, RSUs, stock grant awards and ESPP were recorded within the Consolidated Statements of Operations and Comprehensive Income as follows (in millions):

						Year Ended December 31,
						2019						2018						2017
Cost of revenue						$	10.6					$	7.0					$	6.0
Research and development						17.0						14.3						12.5
Selling and marketing						14.8						14.1						11.7
General and administrative						37.0						42.9						39.6
Share-based compensation expense						79.4						78.3						69.8
Related income tax benefits at federal rate (1)						(16.7)						(16.4)						(24.4)
Share-based compensation expense, net of taxes						$	62.7					$	61.9					$	45.4

____________________

(1)Recognition of related income tax benefits are the result of the adoption of ASU 2016-09 during the first quarter of 2017 through a cumulative effect adjustment of $68.1 million recorded as a credit to retained earnings as of January 1, 2017. Tax benefit is calculated using the federal statutory rate of 21% during the years ended December 31, 2019 and December 31, 2018, and 35% for the year ended December 31, 2017.

Summary of Restricted Stock Units Transactions

A summary of the RSU transactions for the year ended December 31, 2019 are as follows (number of shares in millions):

						Number of Shares						Weighted-Average Grant Date Fair Value
Nonvested shares of RSUs at December 31, 2018						8.6						$	16.59
Granted						5.4						21.64
Achieved						0.2						24.46
Released						(4.8)						14.41
Canceled						(0.5)						19.74
Nonvested shares of RSUs at December 31, 2019						8.9						20.84

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Tabular disclosure of allocation of amount expensed and capitalized for award under share-based payment arrangement to statement of income or comprehensive income and statement of financial position. Includes, but is not limited to, corresponding line item in financial statement.

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Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (h)(1)
-URI http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SAB Topic 14.F)
-URI http://asc.fasb.org/extlink&oid=115993241&loc=d3e301413-122809

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 1
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=116856206&loc=d3e5047-113901

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Disclosure of the number and weighted-average grant date fair value for restricted stock and restricted stock units that were outstanding at the beginning and end of the year, and the number of restricted stock and restricted stock units that were granted, vested, or forfeited during the year.

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