Consolidated Statements of Shareholders' Equity - USD ($) shares in Millions, $ in Millions	Total	Common Stock [Member]	Treasury Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	AOCI Attributable to Parent [Member]
Common Stock, Dividends, Per Share, Declared	$ 0.27
Beginning Balance at Dec. 29, 2018	$ (235.2)	$ 0.6	$ (939.8)	$ 219.3	$ 1,086.8	$ (602.1)
Beginning Balance Shares, Issued at Dec. 29, 2018		63.6	15.0
Net income (loss)	36.9				36.9
Other Comprehensive Income (Loss), Net of Tax	19.0
Dividends, Common Stock, Cash	(12.9)				(12.9)
Shares Issued, Shares, Share-based Payment Arrangement, after Forfeiture			(0.1)
Shares Issued, Value, Share-based Payment Arrangement, after Forfeiture	1.1		$ 5.0	(2.8)	(1.1)
Ending Balance at Mar. 30, 2019	(184.0)	$ 0.6	$ (934.8)	216.5	1,121.8	(588.1)
Ending Balance Shares, Issued at Mar. 30, 2019		63.6	14.9
Cumulative Effect of New Accounting Principle in Period of Adoption	$ 7.1				12.1	(5.0)
Common Stock, Dividends, Per Share, Declared	$ 0.00
Beginning Balance at Dec. 28, 2019	$ (277.0)	$ 0.6	$ (921.6)	215.0	1,067.3	(638.3)
Beginning Balance Shares, Issued at Dec. 28, 2019		63.6	14.7
Net income (loss)	(7.8)				(7.8)
Other Comprehensive Income (Loss), Net of Tax	(81.5)
Shares Issued, Shares, Share-based Payment Arrangement, after Forfeiture			(0.1)
Shares Issued, Value, Share-based Payment Arrangement, after Forfeiture	2.3		$ 5.2	1.9	(4.8)
Ending Balance at Mar. 28, 2020	$ (364.0)	$ 0.6	$ (916.4)	$ 216.9	$ 1,054.7	$ (719.8)
Ending Balance Shares, Issued at Mar. 28, 2020		63.6	14.6