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v3.25.3

BENEFIT PLANS: (Details) - USD ($) $ in Millions | 9 Months Ended
--- | ---
Sep. 30, 2025 | Sep. 30, 2024
Defined contribution plan and post-retirement defined benefit plans |  |
Defined benefit plan, net periodic benefit costs |  |
Service cost | $ 1.9 | $ 1.9
Interest cost | 2.8 | 2.8
Expected return on plan assets | (5.5) | (4.7)
Amortization of prior service cost/ (credit) | 0.1 | 0.2
Amortization of net loss/(gain) | 0.1 | 0.3
Net periodic (benefit) cost | (0.6) | 0.5
Defined contribution plan and post-retirement defined benefit plans | Maximum |  |
Defined benefit plan, net periodic benefit costs |  |
Amortization of prior service cost/ (credit) | 0.1 | 0.1
Post-retirement health care plans |  |
Defined benefit plan, net periodic benefit costs |  |
Interest cost | 1.6 | 1.5
Net periodic (benefit) cost | $ 1.6 | $ 1.5

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- Definition Amount of expected return (loss) recognized in net periodic benefit (cost) credit, calculated based on expected long-term rate of return and market-related value of plan assets of defined benefit plan. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Topic 715 -SubTopic 20 -Name Accounting Standards Codification -Section 55 -Paragraph 17 -Publisher FASB -URI https://asc.fasb.org/1943274/2147480482/715-20-55-17 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 715 -SubTopic 20 -Name Accounting Standards Codification -Section 45 -Paragraph 3A -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480535/715-20-45-3A Reference 3: http://www.xbrl.org/2003/role/exampleRef -Topic 715 -SubTopic 20 -Name Accounting Standards Codification -Section 55 -Paragraph 18 -Publisher FASB -URI https://asc.fasb.org/1943274/2147480482/715-20-55-18 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Topic 715 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (h)(3) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480506/715-20-50-1 Reference 5: http://www.xbrl.org/2003/role/disclosureRef -Topic 715 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 6 -Subparagraph (a)(3) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480506/715-20-50-6 + Details
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