Debt (Schedule Of Debt) (Details) - USD ($) $ in Millions	Sep. 27, 2024	Dec. 29, 2023
Debt Instrument [Line Items]
Uncommitted Credit Facilities, floating rate	$ 400.0
Unamortized discount and issuance costs	(9.8)	$ (13.8)
Total debt	1,790.2	3,066.6
Short-term debt	400.0
Less: Short-term debt		530.4
Long-term debt	$ 1,390.2	2,536.2
Uncommitted Facilities, floating rate
Debt Instrument [Line Items]
Effective interest rate
Uncommitted Credit Facilities, floating rate	$ 0.0	130.4
Revolving Credit Facility | Line of Credit
Debt Instrument [Line Items]
Effective interest rate
Debt, gross	$ 0.0	150.0
Senior Notes, 4.75%, due December 2024 | Senior Notes
Debt Instrument [Line Items]
Fixed rate	4.75%
Effective interest rate	4.95%
Debt, gross	$ 400.0	400.0
Senior Notes, 4.90%, due June 2028 | Senior Notes
Debt Instrument [Line Items]
Fixed rate	4.90%
Effective interest rate	5.04%
Debt, gross	$ 600.0	600.0
Senior Notes, 6.10%, due March 2033 | Senior Notes
Debt Instrument [Line Items]
Fixed rate	6.10%
Effective interest rate	6.13%
Debt, gross	$ 800.0	800.0
Term Loan, due April 2026 | Unsecured Debt | Line of Credit
Debt Instrument [Line Items]
Effective interest rate
Debt, gross	$ 0.0	500.0
Term Loan, due April 2028 | Unsecured Debt | Line of Credit
Debt Instrument [Line Items]
Effective interest rate
Debt, gross	$ 0.0	$ 500.0