Goodwill and Intangibles (Tables)

12 Months Ended

Dec. 31, 2023

Goodwill and Intangible Assets Disclosure [Abstract]

Summary of Change in Carrying Amount of Goodwill

The change in carrying amount of goodwill by reporting segment for the year ended December 31, 2022 was as follows (in millions):

	Installation		Other		Consolidated
Goodwill (gross) - January 1, 2022	$	331.8	$	60.7	$	392.5
Business combinations	21.7		27.6		49.3
Other adjustments	1.8		—		1.8
Goodwill (gross) - December 31, 2022	355.3		88.3		443.6
Accumulated impairment losses	(70.0)		—		(70.0)
Goodwill (net) - December 31, 2022	$	285.3	$	88.3	$	373.6

The change in carrying amount of goodwill by reporting segment for the year ended December 31, 2023 was as follows (in millions):

	Installation		Other		Consolidated
Goodwill (gross) - January 1, 2023	$	355.3	$	88.3	$	443.6
Business combinations	20.8		—		20.8
Other adjustments	(0.9)		5.3		4.4
Goodwill (gross) - December 31, 2023	375.2		93.6		468.8
Accumulated impairment losses	(70.0)		—		(70.0)
Goodwill (net) - December 31, 2023	$	305.2	$	93.6	$	398.8

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 December 31,
	2023						2022
	Gross Carrying Amount		Accumulated Amortization		Net Book Value		Gross Carrying Amount		Accumulated Amortization		Net Book Value
Amortized intangibles:
Customer relationships	$	357.4	$	177.8	$	179.6	$	338.0	$	145.7	$	192.3
Covenants not-to-compete	32.1		23.7		8.4		30.9		20.1		10.8
Trademarks and tradenames	128.0		47.4		80.6		119.6		39.6		80.0
Backlog	21.6		21.5		0.1		20.8		20.5		0.3
Total intangibles	$	539.1	$	270.4	$	268.7	$	509.3	$	225.9	$	283.4

Schedule of Estimated Aggregate Annual Amortization

Remaining estimated aggregate annual amortization expense is as follows (in millions):

2024	$	40.9
2025	35.4
2026	31.4
2027	27.1
2028	23.7
Thereafter	110.2