Income Taxes (Tables)

12 Months Ended

Dec. 31, 2024

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,
	2024		2023		2022
Domestic	$	1,312.5	$	1,298.1	$	1,355.6
Foreign	122.9		152.1		132.2
Total	$	1,435.4	$	1,450.2	$	1,487.8

Schedule of Components of Income Tax Expense (Benefit)

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

	Year Ended December 31,
	2024		2023		2022
Current:
Federal	$	267.4	$	267.3	$	281.8
State	72.8		69.7		75.8
Foreign	31.5		41.6		33.9
Total current	371.7		378.6		391.5
Deferred:
Domestic	(14.0)		(29.3)		(15.0)
Foreign	(0.1)		(3.4)		(3.2)
Total deferred	(14.1)		(32.7)		(18.2)
Income tax expense	$	357.6	$	345.9	$	373.3

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 income tax rate was as follows:

	Year Ended December 31,
	2024				2023				2022
Statutory federal income tax rate	$	301.4	21.0	%	$	304.5	21.0	%	$	312.4	21.0	%
State taxes, net of federal effect	60.0		4.2		55.8		3.8		61.1		4.1
Excess tax benefit of equity awards	(15.5)		(1.1)		(29.6)		(2.0)		(12.0)		(0.8)
Tax on foreign earnings	5.8		0.4		8.5		0.6		3.0		0.2
Other	5.9		0.4		6.7		0.5		8.8		0.6
Effective income tax rate	$	357.6	24.9	%	$	345.9	23.9	%	$	373.3	25.1	%

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.

	December 31,
	2024		2023
Deferred tax assets:
Contract liabilities	$	33.5	$	38.4
Equity compensation plans	29.4		34.5
Net operating loss and credit carryforwards, net	40.2		17.0
Payroll and benefits	10.3		17.2
Operating lease liabilities	38.7		45.6
Accounts receivable	20.7		20.1
Other	22.5		19.9
Total deferred tax assets	195.3		192.7
Deferred tax liabilities:
Acquisition-related intangibles	279.8		269.8
Property and equipment	14.7		22.4
Operating lease right-of-use assets	22.5		27.6
Other	23.0		26.7
Total deferred tax liabilities	340.0		346.5
Deferred tax asset valuation allowance	21.9		17.0
Net deferred tax liabilities	$	166.6	$	170.8

Schedule of Unrecognized Tax Benefits Roll Forward

Changes in the Company’s unrecognized tax benefits as of December 31, 2024, 2023 and 2022 were as follows:

	Year Ended December 31,
	2024		2023		2022
Balance as of January 1	$	19.3	$	18.7	$	18.4
Additions/reductions for current year and prior year	0.4		0.6		0.3
Balance as of December 31	$	19.7	$	19.3	$	18.7