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Acquisitions, Goodwill and Other Intangible Assets (Schedule of Intangible Assets) (Details) - USD ($)
$ in Millions
 6 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Dec. 31, 2025
Intangible Asset, Finite-Lived [Line Items]      
Gross $ 1,223.9   $ 1,003.1
Accumulated Amortization (654.7)   (623.8)
Total $ 569.2   379.3
Business Combination, Intangible Asset, Acquired, Finite-Lived and Indefinite-Lived
The preliminary allocation of the estimated fair values of the assets acquired and liabilities assumed includes $233.0 million of acquired intangible assets, as follows:

(in millions)Weighted average useful life (years)
Customer-related assets$113.0 13
Technology-based assets115.0 8
Intellectual property5.0 7
Total intangible assets$233.0 
The allocation of the fair values of the assets acquired and liabilities assumed includes $9.7 million of goodwill, which is not deductible for income tax purposes, and $13.1 million of acquired intangible assets, as follows:

(in millions)Weighted average useful life (years)
Customer-related assets$0.6 10
Technology-based assets12.5 5
Total intangible assets$13.1 
The allocation of the fair values of the assets acquired and liabilities assumed includes $21.3 million of goodwill, which is not deductible for income tax purposes, and $10.6 million of acquired intangible assets, as follows:

(in millions)Weighted average useful life (years)
Customer-related assets$1.4 15
Technology-based assets9.1 8
Intellectual property0.1 3
Total intangible assets$10.6 
  
Customer-related assets      
Intangible Asset, Finite-Lived [Line Items]      
Gross $ 689.8   583.9
Accumulated Amortization (341.0)   (324.1)
Total 348.8   259.8
Intellectual property & other      
Intangible Asset, Finite-Lived [Line Items]      
Gross 95.0   91.2
Accumulated Amortization (75.8)   (74.2)
Total 19.2   17.0
Technology-Based Intangible Assets      
Intangible Asset, Finite-Lived [Line Items]      
Gross 439.1   328.0
Accumulated Amortization (237.9)   (225.5)
Total $ 201.2   $ 102.5