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Income Taxes (Tables)

12 Months Ended

Dec. 31, 2021

Income Tax Disclosure [Abstract]

Schedule of Income before Income Tax, Domestic and Foreign

Income before income taxes and loss from equity method investment consisted of the following (in millions):

			Year Ended December 31,
			2021						2020						2019
Domestic			$	567.7					$	490.6					$	371.7
Foreign			60.7						51.1						14.3
Total income before income taxes and loss from equity method investment			$	628.4					$	541.7					$	386.0

Schedule of Components of Income Tax Expense (Benefit)

The provision for (benefit from) income taxes consisted of the following (in millions):

			Year Ended December 31,
			2021						2020						2019
Current:
Federal			$	80.7					$	38.6					$	11.0
State			2.5						8.1						0.1
Foreign			23.3						13.6						11.4
Total current			$	106.5					$	60.3					$	22.5
Deferred:
Federal			$	(90.2)					$	(8.1)					$	40.6
State			(1.1)						(0.8)						(6.0)
Foreign			(1.1)						1.8						(2.8)
Total deferred			(92.4)						(7.1)						31.8
Provision for income taxes			$	14.1					$	53.2					$	54.3

Schedule of Effective Income Tax Rate Reconciliation

The provision for income taxes differs from the amount computed by applying the statutory federal income tax rate as follows (in millions):

			Year Ended December 31,
			2021						2020						2019
Tax at federal statutory tax rate			$	132.0					$	113.8					$	81.2
Foreign income taxed at different rates			2.9						16.4						12.3
Foreign withholding taxes			37.4						18.8						16.0
Stock-based compensation expense			(74.8)						(39.6)						(30.6)
Foreign tax credit			(53.2)						(30.1)						(30.4)
State taxes—net of federal benefit			(4.6)						4.9						(11.3)
Research and development credit			(11.1)						(7.5)						(6.8)
Valuation allowance			20.0						11.9						22.0
Impact of the 2017 Tax Act:
One-time transition tax			5.8						2.6						(2.1)
Foreign-Derived Intangible Income			(33.6)						(44.3)						—
Other			(6.7)						6.3						4.0
Total provision for income taxes			$	14.1					$	53.2					$	54.3

Schedule of Deferred Tax Assets and Liabilities

The tax effects of temporary differences that give rise to significant portions of the deferred tax assets as of the years ended are presented below (in millions):

			December 31, 2021						December 31, 2020
Deferred tax assets:
General business credit carryforward			$	63.5					$	48.9
Deferred revenue			276.5						216.4
Reserves and accruals			59.5						41.9
Net operating loss carryforward			22.2						23.4
Stock-based compensation expense			18.3						17.5
Depreciation and amortization			17.0						6.3
Capitalized research expenditures			64.2						16.6
Operating lease liabilities			13.1						11.6
Total deferred tax assets			534.3						382.6
Less: Valuation allowance			(75.0)						(54.9)
Deferred tax assets, net of valuation allowance			459.3						327.7
Deferred tax liabilities:
Deferred contract costs			(97.4)						(74.0)
Operating lease ROU assets			(11.9)						(10.8)
Acquired intangibles			(15.7)						(5.7)
Total deferred tax liabilities			(125.0)						(90.5)
Net deferred tax assets			$	334.3					$	237.2

Schedule of Aggregate Changes in Unrecognized Tax Benefits

The aggregate changes in the balance of unrecognized tax benefits are as follows (in millions):

			Year Ended December 31,
			2021						2020						2019
Unrecognized tax benefits, beginning of year			$	77.3					$	67.5					$	63.5
Gross increases for tax positions related to the current year			7.6						13.1						11.4
Gross decreases for tax positions related to the current year			—						—						—
Gross increases for tax positions related to the prior year			8.7						6.1						3.0
Gross decreases for tax positions related to prior year			(0.7)						(1.3)						(0.3)
Gross decreases for tax positions related to prior year audit settlements			—						(1.4)						(1.7)
Gross decreases for tax positions related to expiration of statute of limitations			(19.6)						(6.7)						(8.4)
Unrecognized tax benefits, end of year			$	73.3					$	77.3					$	67.5

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Tabular disclosure of the components of income tax expense attributable to continuing operations for each year presented including, but not limited to: current tax expense (benefit), deferred tax expense (benefit), investment tax credits, government grants, the benefits of operating loss carryforwards, tax expense that results from allocating certain tax benefits either directly to contributed capital or to reduce goodwill or other noncurrent intangible assets of an acquired entity, adjustments of a deferred tax liability or asset for enacted changes in tax laws or rates or a change in the tax status of the entity, and adjustments of the beginning-of-the-year balances of a valuation allowance because of a change in circumstances that causes a change in judgment about the realizability of the related deferred tax asset in future years.

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