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Inventory - Components of Inventory (Details) - USD ($)
$ in Millions
Dec. 31, 2025
Dec. 31, 2024
Inventory Disclosure [Abstract]    
Raw materials $ 293.4 $ 317.8
Work in process 1,595.2 1,882.8
Finished goods 424.9 353.8
Total inventory 2,313.5 2,554.4
Inventory 2,168.1 2,460.5
Investments and other assets $ 145.4 $ 93.9