Intangible Assets, net (Tables)

12 Months Ended

Dec. 31, 2022

Intangible Assets, net

Summary of intangible assets, net

		December 31, 2022				December 31, 2021
	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	14.2	$	713.6	$	(479.3)	$	713.0	$	(435.1)
Backlog of orders	7.9		22.3		(3.1)		15.8		(0.2)
Other	9.1		9.9		(9.5)		9.9		(9.4)
			745.8		(491.9)		738.7		(444.7)
Intangible assets not subject to amortization:
Trade names			765.7		—		783.7		—
		$	1,511.5	$	(491.9)	$	1,522.4	$	(444.7)

Summary of estimated aggregate amortization expense

	(in millions)
2023	$	43.6
2024		40.1
2025		35.9
2026		26.4
2027		25.8