Accounting Policies (Earnings Per Share Reconciliation) (Details) - shares shares in Millions	3 Months Ended								12 Months Ended
	Dec. 30, 2017	Sep. 30, 2017	Jul. 01, 2017	Apr. 01, 2017	Dec. 31, 2016	Oct. 01, 2016	Jul. 02, 2016	Apr. 02, 2016	Dec. 30, 2017	Dec. 31, 2016	Jan. 02, 2016
Accounting Policies [Abstract]
Shares excluded from the calculation of the effect of dilutive securities									0.5	1.3	0.7
Denominator for Basic Earnings Per Share	44.3	44.4	44.7	44.8	44.8	44.8	44.7	44.7	44.6	44.7	44.7
Effect of Dilutive Securities									0.3	0.3	0.4
Denominator for Diluted Earnings Per Share	44.7	44.8	45.1	45.1	45.1	45.0	45.0	45.0	44.9	45.0	45.1