Goodwill and Intangible Assets (Tables)

12 Months Ended

Dec. 31, 2023

Goodwill and Intangible Assets Disclosure [Abstract]

Summary of Goodwill by Operating Segment

The following table summarizes goodwill by operating and reportable segments (in millions):

	As of December 31, 2023						As of December 31, 2022						As of December 31, 2021
	Goodwill		Accumulated Impairment Losses		Carrying Value		Goodwill		Accumulated Impairment Losses		Carrying Value		Goodwill		Accumulated Impairment Losses		Carrying Value
Operating and Reportable Segments:
ASG	$	1,536.4	$	(748.9)	$	787.5	$	1,536.4	$	(748.9)	$	787.5	$	1,566.3	$	(418.9)	$	1,147.4
ISG	114.0		—		114.0		114.0		—		114.0		114.0		—		114.0
PSG	708.0		(31.9)		676.1		708.0		(31.9)		676.1		708.0		(31.9)		676.1
Total	$	2,358.4	$	(780.8)	$	1,577.6	$	2,358.4	$	(780.8)	$	1,577.6	$	2,388.3	$	(450.8)	$	1,937.5

Schedule of Change in Goodwill

The following table summarizes the change in goodwill (in millions):

Net balance as of December 31, 2021	$	1,937.5
Goodwill impairment	(330.0)
Business divestitures - Goodwill disposed	(29.9)
Net balance as of December 31, 2022	$	1,577.6

Summary of Intangible Assets, Net

Intangible assets subject to amortization, net, were as follows (in millions):

	As of December 31, 2023
	Original Cost		Accumulated Amortization		Accumulated Impairment Losses		Carrying Value
Customer relationships	$	581.5	$	(473.3)	$	(36.3)	$	71.9
Developed technology	939.6		(696.4)		(40.7)		202.5
Licenses	30.0		(5.1)		—		24.9
Other intangibles	79.1		(63.9)		(15.2)		—
Total intangible assets	$	1,630.2	$	(1,238.7)	$	(92.2)	$	299.3

	As of December 31, 2022
	Original Cost		Accumulated Amortization		Accumulated Impairment Losses		Carrying Value
Customer relationships	$	581.5	$	(460.1)	$	(36.3)	$	85.1
Developed technology	939.6		(656.7)		(40.7)		242.2
Licenses	30.0		(1.7)		—		28.3
Other intangibles	82.7		(63.4)		(15.2)		4.1
Total intangible assets	$	1,633.8	$	(1,181.9)	$	(92.2)	$	359.7

Summary of Amortization Expense

Amortization expense for the intangible assets is expected to be as follows over the next five years, and thereafter (in millions):

2024	$	58.1
2025	47.9
2026	41.6
2027	34.6
2028	27.5
Thereafter	89.6
Total estimated amortization expense	$	299.3