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Affiliated Companies (Tables) | 12 Months Ended
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Dec. 31, 2025
Equity Method Investments and Joint Ventures [Abstract] |
Schedule of Equity Method Investments | At December 31, 2025, the following affiliated companies were accounted for under the equity method:
| Location |  | Ownership interest
The West Company Mexico, S.A. de C.V. | Mexico |  | 49%
Aluplast, S.A. de C.V. | Mexico |  | 49%
Pharma Tap, S.A. de C.V. | Mexico |  | 49%
Pharma Rubber, S.A. de C.V. | Mexico |  | 49%
Daikyo Seiko, Ltd. ("Daikyo") | Japan |  | 49%
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 as of December 31:
($ in millions) | 2025 |  | 2024
Aggregate carrying value of investments in affiliated companies: |  |  |
Equity method affiliates | $ | 208.3 |  |  | $ | 194.9 |
Non-equity method affiliates | 4.0 |  |  | 7.2 |
Total investments in affiliated companies | $ | 212.3 |  |  | $ | 202.1 |
The following table summarizes the amounts due to and from affiliates in the consolidated balance sheets as of December 31:
($ in millions) |  | 2025 |  | 2024
Payables due to affiliates |  | $ | 26.2 |  |  | $ | 18.7 |
Receivables due from affiliates |  | $ | 2.0 |  |  | $ | 2.5 |
The following table summarizes the Company's affiliate transactions:
(in millions) | 2025 |  | 2024 |  | 2023
Purchases from (and payments to) affiliates | $ | 122.6 |  |  | $ | 110.0 |  |  | $ | 142.5 |
Sales to affiliates | $ | 12.7 |  |  | $ | 15.3 |  |  | $ | 11.2 |
Unremitted income of affiliates | $ | 171.9 |  |  | $ | 161.4 |  |  | $ | 148.0 |
Dividends received from affiliates | $ | 3.9 |  |  | $ | 1.3 |  |  | $ | 3.4 |
Equity in unrealized gains of Daikyo's investments & derivatives | $ | 3.0 |  |  | $ | 2.4 |  |  | $ | 2.2 |

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- Definition Tabular disclosure of equity method investments including, but not limited to, name of each investee or group of investments, percentage ownership, difference between recorded amount of an investment and the value of the underlying equity in the net assets, and summarized financial information. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 323 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 3 -Publisher FASB -URI https://asc.fasb.org/1943274/2147481687/323-10-50-3 + Details
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- Definition Tabular disclosure of investments in and advances to affiliates. Does not include the tabular disclosure of the disaggregation of investments in and advances to affiliates across legal entities. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 946 -SubTopic 320 -Name Accounting Standards Codification -Section S99 -Paragraph 6 -Subparagraph (SX 210.12-14) -Publisher FASB -URI https://asc.fasb.org/1943274/2147477271/946-320-S99-6 + Details
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