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Income Taxes (Tables)

12 Months Ended

Dec. 31, 2022

Income Tax Disclosure [Abstract]

Schedule of Income before Income Tax, Domestic and Foreign

Income before income taxes was taxed under the following jurisdictions:

						Year Ended December 31,
						2022						2021						2020
Domestic						$	1,355.6					$	1,186.7					$	934.3
Foreign						132.2						111.1						68.0
Total						$	1,487.8					$	1,297.8					$	1,002.3

Schedule of Components of Income Tax Expense (Benefit)

Components of Income tax expense (benefit) consist of the following:

						Year Ended December 31,
						2022						2021						2020
Current:
Federal						$	281.8					$	235.6					$	166.5
State						75.8						52.9						49.2
Foreign						33.9						27.4						18.3
Total current						391.5						315.9						234.0
Deferred:
Domestic						(15.0)						(8.7)						(18.8)
Foreign						(3.2)						2.0						(1.4)
Total deferred						(18.2)						(6.7)						(20.2)
Income tax expense						$	373.3					$	309.2					$	213.8

Schedule of Effective Income Tax Rate Reconciliation

The reconciliation between the statutory tax rate expressed as a percentage of income before income taxes and the effective tax rate was as follows:

						Year Ended December 31,
						2022												2021												2020
Statutory federal income tax rate						$	312.4					21.0		%				$	272.5					21.0		%				$	210.5					21.0		%
State taxes, net of federal effect						61.1						4.1						50.3						3.9						36.0						3.6
Excess tax benefit of equity awards						(12.0)						(0.8)						(30.1)						(2.3)						(28.8)						(2.9)
Tax on foreign earnings						3.0						0.2						1.7						0.1						1.0						0.1
Effect of tax law changes						—						—						4.8						0.4						(6.8)						(0.7)
Other						8.8						0.6						10.0						0.7						1.9						0.2
Effective tax rate						$	373.3					25.1		%				$	309.2					23.8		%				$	213.8					21.3		%

Schedule of Deferred Tax Assets and Liabilities

The tax effect of temporary differences that give rise to net deferred income tax liabilities is presented below. Reclassifications have been made to conform to current year presentation.

						December 31,
						2022						2021
Deferred tax assets:
Contract liabilities						$	46.3					$	45.3
Equity compensation plans						31.3						22.7
Net operating loss and credit carryforwards, net						17.0						28.9
Payroll and benefits						24.3						37.6
Operating lease liabilities						48.5						51.6
Accounts receivable						18.1						18.0
Other						19.5						20.5
Total deferred tax assets						205.0						224.6
Deferred tax liabilities:
Acquisition-related intangibles						293.3						322.2
Property and equipment						38.1						47.6
Operating lease right-of-use assets						32.9						35.6
Other						27.1						26.5
Total deferred tax liabilities						391.4						431.9
Deferred tax asset valuation allowance						17.0						17.0
Net deferred tax liabilities						$	203.4					$	224.3

Schedule of Unrecognized Tax Benefits Roll Forward

Changes in the Company’s unrecognized tax benefits as of December 31, 2022, 2021 and 2020 were as follows:

						Year Ended December 31,
						2022						2021						2020
Balance as of January 1						$	18.4					$	18.3					$	17.7
Additions for tax positions related to current year						0.3						0.1						0.1
Additions for tax positions related to prior year												—						0.5
Balance as of December 31						$	18.7					$	18.4					$	18.3

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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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Tabular disclosure of the reconciliation using percentage or dollar amounts of the reported amount of income tax expense attributable to continuing operations for the year to the amount of income tax expense that would result from applying domestic federal statutory tax rates to pretax income from continuing operations.

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Tabular disclosure of income before income tax between domestic and foreign jurisdictions.

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Tabular disclosure of the change in unrecognized tax benefits.

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