Intangible Assets, net (Tables)

6 Months Ended

Jun. 30, 2021

Intangible Assets, net

Summary of intangible assets, net

		June 30, 2021				December 31, 2020
	Weighted Average	Gross				Gross
	Amortizable	Carrying		Accumulated		Carrying		Accumulated
	Life in Years	Amount		Amortization		Amount		Amortization
		(in millions)
Intangible assets subject to amortization:
Covenants not to compete	5.0	$	0.7	$	(0.5)	$	0.7	$	(0.5)
Customer lists/relationships	14.9		623.4		(415.2)		623.2		(396.7)
Software	10.0		8.1		(8.1)		8.1		(8.1)
Other	5.2		0.8		(0.6)		1.1		(0.9)
			633.0		(424.4)		633.1		(406.2)
Intangible assets not subject to amortization:
Trade names			720.3		—		720.2		—
		$	1,353.3	$	(424.4)	$	1,353.3	$	(406.2)

Summary of estimated aggregate amortization expense

	(in millions)
2021 (remaining six months)	$	18.1
2022		35.9
2023		31.6
2024		28.1
2025		23.9
2026		14.4