Summary of Significant Accounting Policies (Net Income Per Common Share) (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended								12 Months Ended
	Dec. 29, 2019	Sep. 29, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 30, 2018	Sep. 30, 2018	Jul. 01, 2018	Apr. 01, 2018	Dec. 29, 2019	Dec. 30, 2018	Dec. 31, 2017
Net Income Per Common Share:
Net income	$ 115.7	$ 106.7	$ 104.6	$ 75.3	$ 91.1	$ 90.3	$ 85.9	$ 66.5	$ 402.3	$ 333.8	$ 227.2
Earnings Per Share, Basic [Abstract]
Basic earnings per common share (in USD per share)	$ 3.17	$ 2.93	$ 2.89	$ 2.09	$ 2.53	$ 2.52	$ 2.40	$ 1.87	$ 11.08	$ 9.32	$ 6.45
Diluted earnings per share:
Weighted average common shares outstanding (in shares)									36.3	35.8	35.2
Effect of diluted securities (in shares)									1.2	1.2	1.1
Weighted average diluted common shares outstanding (in shares)									37.5	37.0	36.3
Diluted Earnings Per Common Share [Abstract]
Diluted earnings per common share (in USD per share)	$ 3.06	$ 2.84	$ 2.80	$ 2.02	$ 2.45	$ 2.43	$ 2.32	$ 1.81	$ 10.73	$ 9.01	$ 6.26