Goodwill and Intangibles (Tables)

9 Months Ended

Sep. 30, 2024

Goodwill and Intangible Assets Disclosure [Abstract]

Summary of Change in Carrying Amount of Goodwill

The change in carrying amount of goodwill by reporting segment was as follows (in millions):

	Installation		Other		Consolidated
Goodwill (gross) - January 1, 2024	$	375.2	$	93.6	$	468.8
Business combinations	15.6		0.6		16.2
Other adjustments	0.1		—		0.1
Goodwill (gross) - September 30, 2024	390.9		94.2		485.1
Accumulated impairment losses	(70.0)		—		(70.0)
Goodwill (net) - September 30, 2024	$	320.9	$	94.2	$	415.1

Schedule of Gross Carrying Amount, Accumulated Amortization and Net Book Value

The following table provides the gross carrying amount, accumulated amortization and net book value for each major class of intangibles (in millions):

	As of September 30,						As of December 31,
	2024						2023
	Gross Carrying Amount		Accumulated Amortization		Net Book Value		Gross Carrying Amount		Accumulated Amortization		Net Book Value
Amortized intangibles:
Customer relationships	$	369.4	$	199.8	$	169.6	$	357.4	$	177.8	$	179.6
Covenants not-to-compete	33.1		26.3		6.8		32.1		23.7		8.4
Trademarks and tradenames	132.6		53.2		79.4		128.0		47.4		80.6
Backlog	21.6		21.6		—		21.6		21.5		0.1
	$	556.7	$	300.9	$	255.8	$	539.1	$	270.4	$	268.7

Schedule of Estimated Aggregate Annual Amortization

Remaining estimated aggregate annual amortization expense is as follows (amounts, in millions, are for the fiscal year ended):

Remainder of 2024	$	10.4
2025	36.9
2026	32.9
2027	28.6
2028	25.2
Thereafter	121.8