Accounting Policies (Earnings Per Share Reconciliation) (Details) In Millions, unless otherwise specified	3 Months Ended								12 Months Ended
	Jan. 03, 2015	Sep. 27, 2014	Jun. 28, 2014	Mar. 29, 2014	Dec. 28, 2013	Sep. 28, 2013	Jun. 29, 2013	Mar. 30, 2013	Jan. 03, 2015	Dec. 28, 2013	Dec. 29, 2012
Accounting Policies [Abstract]
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount									0.3	0.7	0.3
Denominator for basic EPS	44.7	44.9	45.2	45.1	45.1	45.1	45.0	45.0	45.0	45.0	41.8
Incremental Common Shares Attributable to Share-based Payment Arrangements									0.3	0.4	0.3
Denominator for diluted EPS	44.7	45.2	45.5	45.4	45.1	45.4	45.3	45.3	45.3	45.4	42.1