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Affiliated Companies
 6 Months Ended
Jun. 30, 2025
Equity Method Investments and Joint Ventures [Abstract]  
Affiliated Companies Affiliated Companies
The following table summarizes the aggregate carrying amounts of our investments in affiliated companies that are accounted for under the equity method and our investments in affiliated companies that are not accounted for under the equity method:
June 30,December 31,
($ in millions)20252024
Aggregate carrying value of investments in affiliated companies:
   Equity method affiliates$217.4 $194.9 
   Non-equity method affiliates7.3 7.2 
Total investments in affiliated companies$224.7 $202.1 
We have elected to record non-equity method investments, for which fair value was not readily determinable, at cost, less impairment, adjusted for subsequent observable price changes. We test these investments for impairment whenever circumstances indicate that the carrying value of the investments may not be recoverable.

The following table summarizes the amounts due to and from affiliates in the condensed consolidated balance sheets:
June 30,December 31,
($ in millions)20252024
Payables due to affiliates$24.8 $18.7 
Receivables due from affiliates$2.2 $2.5 

The following table summarizes the Company's affiliate transactions:
Three Months Ended
June 30,		Six Months Ended
June 30,
($ in millions)2025202420252024
Purchases from (and payments to) affiliates$30.2 $24.9 $57.9 $53.5 
Sales to affiliates$2.8 $4.0 $6.0 $7.2 
The majority of the purchase transactions listed above relate to a distributorship agreement with Daikyo Seiko, Ltd. ("Daikyo") that allows the Company to purchase and re-sell Daikyo products.