Accounting Policies (Earnings Per Share Reconciliation) (Details) - shares shares in Millions	3 Months Ended								12 Months Ended
	Dec. 31, 2016	Oct. 01, 2016	Jul. 02, 2016	Apr. 02, 2016	Jan. 02, 2016	Oct. 03, 2015	Jul. 04, 2015	Apr. 04, 2015	Dec. 31, 2016	Jan. 02, 2016	Jan. 03, 2015
Accounting Policies [Abstract]
Shares excluded from the calculation of the effect of dilutive securities									1.3	0.7	0.3
Denominator for basic EPS	44.8	44.8	44.7	44.7	44.7	44.8	44.8	44.7	44.7	44.7	45.0
Effect of Dilutive Securities									0.3	0.4	0.3
Denominator for diluted EPS	45.1	45.0	45.0	45.0	44.7	45.1	45.2	45.1	45.0	45.1	45.3