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Goodwill and Intangible Assets (Tables)
 9 Months Ended
Sep. 30, 2024
Goodwill and Intangible Assets Disclosure [Abstract]  
Schedule of Changes in the Carrying Amount of Goodwill
The changes in the carrying amount of goodwill for the nine months ended September 30, 2024 were as follows:
Goodwill
Accumulated
Impairment
Losses
Total
Balance as of December 31, 2023
$220.7 $(33.3)$187.4 
Additions9.5 — 9.5 
Foreign currency fluctuations3.0 (1.5)1.5 
Balance as of September 30, 2024
$233.2 $(34.8)$198.4 
Schedule of Balances of Acquired Intangible Assets, Excluding Goodwill
The balances of acquired intangible assets, excluding goodwill, were as follows:
Customer ListsTrade NamesTechnologyTotal
Balance as of September 30, 2024
Original cost$165.5 $29.6 $16.6 $211.7 
Accumulated amortization(109.7)(21.6)(14.0)(145.3)
Carrying value$55.8 $8.0 $2.6 $66.4 
Weighted average original life (in years)141012
Balance as of December 31, 2023
Original cost$150.6 $29.3 $16.3 $196.2 
Accumulated amortization(100.8)(19.2)(13.1)(133.1)
Carrying value$49.8 $10.1 $3.2 $63.1 
Weighted average original life (in years)151111
Schedule of Estimated Aggregate Amortization Expense
Estimated aggregate amortization expense based on the current carrying value of amortizable intangible assets for each of the five succeeding years and thereafter is as follows:
Remaining 2024
$4.5 
202513.2 
202612.0 
20278.8 
20287.0 
Thereafter20.9 
Total$66.4