Reporting Segment And Geographic Information (Schedule Of Revenue, Operating Income And Identifiable Assets By Segment) (Details) - USD ($) $ in Millions	3 Months Ended
	Apr. 04, 2025	Mar. 29, 2024
Segment Reporting Information [Line Items]
Total revenue	$ 840.6	$ 953.3
Operating expense	463.3	484.4
Operating income	97.5	109.2
AECO
Segment Reporting Information [Line Items]
Total revenue	335.4	339.1
Cost of sales	58.9	55.3
Operating expense	184.9	157.1
Operating income	$ 91.6	$ 126.7
Segment operating income (as percent)	27.30%	37.40%
Field Systems
Segment Reporting Information [Line Items]
Total revenue	$ 359.2	$ 419.2
Cost of sales	154.2	195.9
Operating expense	98.4	125.0
Operating income	$ 106.6	$ 98.3
Segment operating income (as percent)	29.70%	23.40%
T&L
Segment Reporting Information [Line Items]
Total revenue	$ 146.0	$ 195.0
Cost of sales	44.6	73.5
Operating expense	75.3	85.2
Operating income	$ 26.1	$ 36.3
Segment operating income (as percent)	17.90%	18.60%