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Intangible Assets, Net
 12 Months Ended
Dec. 31, 2024
Goodwill and Intangible Assets Disclosure [Abstract]  
Intangible Assets, Net Intangible Assets, Net
The gross carrying amount and accumulated amortization for intangible assets consisted of the following (in millions):
December 31, 2024
Gross
Carrying
Amount		Accumulated
Amortization		Net
Carrying
Amount
Amortized Intangible Assets
Customer relationships$726.6 $254.3 $472.3 
Acquired and developed technology90.3 47.9 42.4 
Trade names47.2 9.4 37.8 
Non-compete agreements2.9 2.9 — 
Patents1.9 1.0 0.9 
     Total
$868.9 $315.5 $553.4 
December 31, 2023

Gross
Carrying
Amount		Accumulated
Amortization		Net
Carrying
Amount
Amortized Intangible Assets
Customer relationships$743.8 $209.4 $534.4 
Acquired and developed technology92.6 38.6 54.0 
Trade names32.7 6.4 26.3 
Non-compete agreements2.9 2.8 0.1 
Patents1.9 0.9 1.0 
Total$873.9 $258.1 $615.8 
Unamortized Intangible Assets
Trade names(1)
$15.5 $— $15.5 
(1) Amortization of certain trade names began effective January 1, 2024 to reflect current expectations for the period over which the assets will contribute to future cash flows.

Amortization expense of intangible assets was $62.9 million, $61.0 million, and $53.4 million for the years ended December 31, 2024, 2023 and 2022, respectively. Finite-lived intangibles in the FAM segment are expensed using the straight-line amortization method.

The following table shows the estimated aggregate amortization expense as of December 31, 2024 (in millions):
2025$62.4 
2026$61.8 
2027$61.7 
2028$58.3 
2029$55.6