v3.26.3
Goodwill and Other Intangible Assets - Schedule of Goodwill and Other Intangible Assets Rollforward (Details) - USD ($)
$ in Millions
 3 Months Ended 9 Months Ended
Sep. 30, 2026
Sep. 30, 2025
Sep. 30, 2026
Sep. 30, 2025
Goodwill        
Goodwill, beginning Balance $ 795.9 $ 534.6 $ 614.1 $ 439.2
Acquisition of businesses 0.0 595.4 180.6 690.8
Attribution of acquisition date fair value estimates between goodwill and other intangible assets (73.4) (37.7) (73.4) (37.7)
Measurement period adjustments (1.8) 0.0 (0.6) 0.0
Goodwill, ending balance 720.7 1,092.3 720.7 1,092.3
Other Intangible Assets        
Other intangible assets (excluding goodwill), beginning balance 387.8 270.8 406.1 281.1
Acquisition of businesses 0.0 0.0 0.0 0.0
Attribution of acquisition date fair value estimates between goodwill and other intangible assets 73.4 37.6 73.4 37.6
Measurement period adjustments 0.0 0.0 0.0 0.0
Amortization (12.5) (7.8) (30.8) (18.1)
Other intangible assets (excluding goodwill), ending balance 448.7 300.6 448.7 300.6
Total Goodwill and Other Intangible Assets        
Total goodwill and other intangible assets, beginning balance 1,183.7 805.4 1,020.2 720.3
Acquisition of businesses 0.0 595.4 180.6 690.8
Attribution of acquisition date fair value estimates between goodwill and other intangible assets 0.0 (0.1) 0.0 (0.1)
Measurement period adjustments (1.8) 0.0 (0.6) 0.0
Amortization (12.5) (7.8) (30.8) (18.1)
Total goodwill and other intangible assets, ending balance $ 1,169.4 $ 1,392.9 $ 1,169.4 $ 1,392.9