Earnings Per Share (Computation of Basic and Diluted Earnings Per Share) (Details) - shares shares in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jul. 01, 2018	Jun. 30, 2019	Jul. 01, 2018
Earnings Per Share [Abstract]
Weighted average common shares outstanding (in shares)	36.2	35.8	36.2	35.7
Effect of dilutive securities (primarily stock options) (in shares)	1.2	1.2	1.1	1.2
Weighted average diluted common shares outstanding (in shares)	37.4	37.0	37.3	36.9