Net Earnings Per Share - Dividends Declared and Paid (Details) - USD ($) $ / shares in Units, $ in Millions		3 Months Ended				6 Months Ended
	Jul. 01, 2021	Jul. 02, 2021	Apr. 02, 2021	Jun. 26, 2020	Mar. 27, 2020	Jul. 02, 2021	Jun. 26, 2020
Earnings Per Share [Abstract]
Dividend per common share (in dollars per share)		$ 0.07	$ 0.07	$ 0.07	$ 0.07	$ 0.14	$ 0.14
Amount, common shares		$ 23.7	$ 23.7	$ 23.6	$ 23.5	$ 47.4	$ 47.1
Dividend per MCPS (in dollars per share)	$ 12.50	$ 12.5	$ 12.5	$ 12.5	$ 12.5	$ 25.0	$ 25.0
Amount, MCPS		$ 17.2	$ 17.3	$ 17.2	$ 17.3	$ 34.5	$ 34.5