Goodwill and Identifiable Assets (Tables)

12 Months Ended

Dec. 31, 2022

Goodwill and Intangible Assets Disclosure [Abstract]

Schedule of Goodwill

The following table summarizes the activity related to the carrying amount of goodwill by reportable segment since December 31, 2020 (in millions). See Note 15. Segment Reporting for more information on the Company's reportable segments.

	Commercial		Federal Government		Total
Balance as of December 31, 2020	$	778.6	$	642.1	$	1,420.7
2021 acquisitions	51.1		94.8		145.9
Purchase price adjustment	—		3.3		3.3
Translation adjustment	(0.4)		—		(0.4)
Balance as of December 31, 2021	829.3		740.2		1,569.5
2022 acquisitions	246.4		85.5		331.9
Purchase price adjustment	0.4		(8.5)		(8.1)
Translation adjustment	(1.4)		—		(1.4)
Balance as of December 31, 2022	$	1,074.7	$	817.2	$	1,891.9

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Approximately $250.7 million and $127.2 million of the goodwill for the 2022 and 2021 acquisitions, respectively, is deductible for income tax purposes.

Schedule of Acquired Intangible Assets

Acquired intangible assets consisted of the following (in millions):

		December 31, 2022						December 31, 2021
	Estimated Useful Life (in years)	Gross Carrying Amount		Accumulated Amortization		Net Carrying Amount		Gross Carrying Amount		Accumulated Amortization		Net Carrying Amount
Subject to amortization:
Customer and contractual relationships	7 - 13	$	589.3	$	315.7	$	273.6	$	493.9	$	260.2	$	233.7
Contractor relationships	4	—		—		—		45.5		45.5		—
Contract Backlog	1 - 3	44.1		36.5		7.6		34.8		31.0		3.8
Non-compete agreements	1 - 7	41.2		25.6		15.6		29.4		21.6		7.8
		674.6		377.8		296.8		603.6		358.3		245.3
Not subject to amortization:
Trademarks		272.8		—		272.8		242.6		—		242.6
		$	947.4	$	377.8	$	569.6	$	846.2	$	358.3	$	487.9

Schedule of Estimated Future Amortization Expense

Estimated future amortization expense is as follows (in millions):

2023	71.6
2024	58.1
2025	48.8
2026	41.8
2027	32.0
Thereafter	44.5
	$	296.8