Intangible Assets, Net (Tables)

6 Months Ended

Jun. 30, 2024

Intangible Assets, Net

Summary of intangible assets, net

		June 30, 2024				December 31, 2023
	Weighted Average	Gross				Gross
	Amortizable	Carrying		Accumulated		Carrying		Accumulated
	Life in Years	Amount		Amortization		Amount		Amortization
		(in millions)
Intangible assets subject to amortization:
Customer lists/relationships	14.0	$	751.5	$	(539.9)	$	716.0	$	(520.5)
Backlog of orders	7.9		22.1		(7.2)		22.9		(6.0)
Other	9.3		10.2		(9.5)		10.0		(9.5)
			783.8		(556.6)		748.9		(536.0)
Intangible assets not subject to amortization:
Trade names			809.0		—		768.2		—
		$	1,592.8	$	(556.6)	$	1,517.1	$	(536.0)

Summary of estimated aggregate amortization expense

	(in millions)
2024 (remaining six months)	$	21.4
2025		38.9
2026		29.5
2027		28.8
2028		27.3
Thereafter		81.3
	$	227.2