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Affiliated Companies (Tables)
 12 Months Ended
Dec. 31, 2024
Equity Method Investments and Joint Ventures [Abstract]  
Schedule of Equity Method Investments
At December 31, 2024, the following affiliated companies were accounted for under the equity method:
LocationOwnership interest
The West Company Mexico, S.A. de C.V.Mexico49%
Aluplast S.A. de C.V.Mexico49%
Pharma Tap S.A. de C.V.Mexico49%
Pharma Rubber S.A. de C.V.Mexico49%
Daikyo Seiko, Ltd. ("Daikyo")
Japan49%
Schedule of Investments in and Advances to Affiliates
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:
December 31,December 31
($ in millions)20242023
Aggregate carrying value of investments in affiliated companies:
   Equity method affiliates$194.9 $203.2 
   Non-equity method affiliates7.2 6.8 
Total investments in affiliated companies$202.1 $210.0 
The following table summarizes the amounts due to and from affiliates in the condensed consolidated balance sheets:
December 31,December 31
($ in millions)20242023
Payables due to affiliates$18.7 $25.9 
Receivables due from affiliates$2.5 $1.6 

The following table summarizes the Company's affiliate transactions:

(in millions)202420232022
Purchases from (and payments to) affiliates$110.0 $142.5 $167.6 
Sales to affiliates$15.3 $11.2 $14.2 
Unremitted income of affiliates$161.4 $148.0 $133.6 
Dividends received from affiliates$1.3 $3.4 $2.6 
Equity in unrealized (gains) losses of Daikyo's investments & derivatives$2.4 $2.2 $1.6