Goodwill and Intangible Assets (Summary Of Intangible Assets) (Details) - USD ($) $ in Millions	Sep. 30, 2024	Dec. 31, 2023	Dec. 31, 2022
Acquired Finite-Lived Intangible Assets [Line Items]
Weighted  Average Amortization Period of Finite Lived Assets (in years)	18 years
Gross Asset	$ 832.9	$ 666.4
Accumulated Amortization	392.7	357.5
Net	$ 440.2	308.9	$ 344.9
Intellectual property rights
Acquired Finite-Lived Intangible Assets [Line Items]
Weighted  Average Amortization Period of Finite Lived Assets (in years)	10 years 9 months 18 days
Gross Asset	$ 68.9	62.2
Accumulated Amortization	15.8	15.0
Net	$ 53.1	47.2
Customer relationships and backlog
Acquired Finite-Lived Intangible Assets [Line Items]
Weighted  Average Amortization Period of Finite Lived Assets (in years)	18 years 10 months 24 days
Gross Asset	$ 624.2	504.4
Accumulated Amortization	293.5	269.5
Net	$ 330.7	234.9
Developed technology
Acquired Finite-Lived Intangible Assets [Line Items]
Weighted  Average Amortization Period of Finite Lived Assets (in years)	6 years 10 months 24 days
Gross Asset	$ 66.3	26.3
Accumulated Amortization	25.3	21.2
Net	$ 41.0	5.1
Other
Acquired Finite-Lived Intangible Assets [Line Items]
Weighted  Average Amortization Period of Finite Lived Assets (in years)	10 years
Gross Asset	$ 73.5	73.5
Accumulated Amortization	58.1	51.8
Net	$ 15.4	$ 21.7