Intangible Assets, net (Tables)

3 Months Ended

Mar. 31, 2023

Intangible Assets, net

Summary of intangible assets, net

		March 31, 2023				December 31, 2022
	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	$	713.8	$	(490.5)	$	713.6	$	(479.3)
Backlog of orders	7.9		22.3		(3.8)		22.3		(3.1)
Other	9.2		9.9		(9.5)		9.9		(9.5)
			746.0		(503.8)		745.8		(491.9)
Intangible assets not subject to amortization:
Trade names			765.8		—		765.7		—
		$	1,511.8	$	(503.8)	$	1,511.5	$	(491.9)

Summary of estimated aggregate amortization expense

	(in millions)
2023 (remaining nine months)	$	31.8
2024		40.1
2025		35.9
2026		26.4
2027		25.8
Thereafter		82.2
	$	242.2