Earnings (Loss) per Share Schedule of Earnings per Share Basic and Diluted (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 25, 2020	Dec. 27, 2019
Earnings Per Share [Abstract]
Income (loss) from continuing operations	$ (723.5)	$ (969.7)	$ (1,007.2)
Income (loss) from discontinued operations, net of income taxes	$ 6.1	$ 25.1	$ 10.7
Weighted Average Number of Shares Outstanding, Basic	84.7	84.5	83.9
Weighted Average Number of Shares Outstanding, Diluted	84.7	84.5	83.9
Loss from continuing operations	$ (8.54)	$ (11.48)	$ (12.00)
Income (Loss) from Discontinued Operations, Per Basic Share	0.07	0.30	0.13
Earnings Per Share, Basic	(8.47)	(11.18)	(11.88)
Loss from continuing operations	(8.54)	(11.48)	(12.00)
Income (Loss) from Discontinued Operations, Per Diluted Share	0.07	0.30	0.13
Earnings Per Share, Diluted	$ (8.47)	$ (11.18)	$ (11.88)