Goodwill and Identifiable Assets (Notes)

6 Months Ended

Jun. 30, 2024

Goodwill and Intangible Assets Disclosure [Abstract]

Goodwill and Identifiable Intangible Assets

Goodwill and Identifiable Intangible Assets

Goodwill by reportable segment is as follows (in millions):

	Commercial		Federal Government		Total
Balance as of December 31, 2022	$	1,074.7	$	817.2	$	1,891.9
Purchase price adjustment	—		1.1		1.1
Translation adjustment	1.1		—		1.1
Balance as of December 31, 2023	1,075.8		818.3		1,894.1
Translation adjustment	(0.4)		—		(0.4)
Balance at June 30, 2024	$	1,075.4	$	818.3	$	1,893.7

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

		June 30, 2024						December 31, 2023
	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	$	496.0	$	310.1	$	185.9	$	496.0	$	282.0	$	214.0
Non-compete agreements	2 - 7	29.3		20.3		9.0		29.3		18.2		11.1
		525.3		330.4		194.9		525.3		300.2		225.1
Not subject to amortization:
Trademarks		272.8		—		272.8		272.8		—		272.8
		$	798.1	$	330.4	$	467.7	$	798.1	$	300.2	$	497.9

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

Remainder of 2024	$	27.9
2025	48.8
2026	41.8
2027	32.0
2028	21.2
Thereafter	23.2
	$	194.9