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Other Intangible Assets
 12 Months Ended
Dec. 31, 2024
Goodwill and Intangible Assets Disclosure [Abstract]  
Other Intangible Assets Other Intangible Assets
 December 31, 2024December 31, 2023
 Weighted Average Remaining Useful Life (Years)Gross ValueAccumulated
Amortization		Net ValueGross ValueAccumulated
Amortization		Net Value
Customer relationships9.7$96.9 $65.8 $31.1 $94.5 $60.5 $34.0 
Indefinite-lived tradenames*26.6 *26.6 25.9 *25.9 
Technology10.825.1 11.3 13.8 22.8 10.0 12.8 
Other3.54.8 4.4 0.4 4.8 4.2 0.6 
Total$153.4 $81.5 $71.9 $148.0 $74.7 $73.3 
* Not applicable, as these tradenames have an indefinite life.

Amortization expense of other intangible assets was as follows:
Year Ended December 31,
202420232022
Amortization expense$6.8 $6.7 $6.6 

We estimate amortization expense for the five years subsequent to 2024 as follows:
2025$6.9 
2026$6.5 
2027$6.4 
2028$5.5 
2029$3.8