Intangible Assets, Net (Tables)

3 Months Ended

Mar. 31, 2024

Intangible Assets, Net

Summary of intangible assets, net

		March 31, 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	$	721.4	$	(529.8)	$	716.0	$	(520.5)
Backlog of orders	7.9		22.3		(6.6)		22.9		(6.0)
Other	9.4		10.1		(9.5)		10.0		(9.5)
			753.8		(545.9)		748.9		(536.0)
Intangible assets not subject to amortization:
Trade names			778.2		—		768.2		—
		$	1,532.0	$	(545.9)	$	1,517.1	$	(536.0)

Summary of estimated aggregate amortization expense

	(in millions)
2024 (remaining nine months)	$	30.6
2025		36.7
2026		27.3
2027		26.6
2028		25.1
Thereafter		61.6
	$	207.9