Segment Information (Reconciliation Of Our Condensed Consolidated Segment Operating Income To Condensed Consolidated Income Before Income Taxes) (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jul. 01, 2022	Jun. 30, 2023	Jul. 01, 2022
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Consolidated operating income	$ 93.6	$ 134.9	$ 230.6	$ 291.8
Unallocated general corporate expenses	(510.9)	(402.6)	(934.7)	(795.3)
Amortization of purchased intangible assets	(62.1)	(32.3)	(96.8)	(66.9)
Acquisition / divestiture items	(26.5)	(7.3)	(33.5)	(11.2)
Stock-based compensation / deferred compensation	(42.1)	(26.2)	(77.5)	(51.2)
Restructuring and other costs	(6.7)	(10.0)	(18.7)	(22.7)
Total non-operating income (expense), net	(36.1)	86.7	(12.5)	68.3
Consolidated income before taxes	57.5	221.6	218.1	360.1
Operating segment
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Consolidated operating income	265.0	244.0	518.1	506.9
Non-Segment
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Unallocated general corporate expenses	$ (34.0)	$ (33.3)	$ (61.0)	$ (63.1)