Consolidated Statements of Shareholders' Equity - USD ($) shares in Millions, $ in Millions	Total	Cumulative Effect Period Of Adoption, Adjustment	Common Stock [Member]	Treasury Stock [Member]	Paid-In Capital	Retained Earnings [Member]	Retained Earnings [Member] Cumulative Effect Period Of Adoption, Adjustment	Accumulated Other Comprehensive Loss	Accumulated Other Comprehensive Loss Cumulative Effect Period Of Adoption, Adjustment
Beginning balance, shares at Dec. 30, 2017			63.6	12.6
Beginning balance at Dec. 30, 2017	$ (119.4)	$ 0.0	$ 0.6	$ (851.5)	$ 217.8	$ 1,043.1	$ 24.2	$ (529.4)	$ (24.2)
Net income	155.9					155.9
Other comprehensive income (loss)	(48.5)							(48.5)
Cash dividends declared	$ (136.1)					(136.1)
Repurchase of common stock, shares	2.6			2.6
Repurchase of common stock, value	$ (100.2)			$ (100.2)
Stock and options issued for incentive plans, shares				(0.2)
Stock and options issued for incentive plans	13.1			$ 11.9	1.5	(0.3)
Ending balance, shares at Dec. 29, 2018			63.6	15.0
Ending balance at Dec. 29, 2018	(235.2)		$ 0.6	$ (939.8)	219.3	1,086.8		(602.1)
Net income	12.4					12.4
Other comprehensive income (loss)	(31.2)							(31.2)
Cash dividends declared	$ (39.4)					(39.4)
Repurchase of common stock, shares	0.0
Stock and options issued for incentive plans, shares				(0.3)
Stock and options issued for incentive plans	$ 9.3			$ 18.2	(4.3)	(4.6)
Ending balance, shares at Dec. 28, 2019			63.6	14.7
Ending balance at Dec. 28, 2019	(277.0)	$ 7.1	$ 0.6	$ (921.6)	215.0	1,067.3	$ 12.1	(638.3)	$ (5.0)
Net income	112.2					112.2
Other comprehensive income (loss)	$ (47.6)							(47.6)
Repurchase of common stock, shares	0.0
Stock and options issued for incentive plans, shares				(0.4)
Stock and options issued for incentive plans	$ 7.7			$ 25.1	0.5	(17.9)
Ending balance, shares at Dec. 26, 2020			63.6	14.3
Ending balance at Dec. 26, 2020	$ (204.7)		$ 0.6	$ (896.5)	$ 215.5	$ 1,161.6		$ (685.9)