Employee Benefit Plans (Fair Value Measured Using Significant Unobservable Inputs (Level 3)) (Details) (Significant Unobservable Inputs (Level 3) [Member], USD $) In Millions, unless otherwise specified	12 Months Ended
	Jan. 03, 2015	Dec. 28, 2013
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Beginning Balance	$ 7.9	$ 4.0
Purchases, sales, settlements, net	19.7	4.0
Unrealized gains	(2.3)	(0.1)
Ending Balance	25.3	7.9
Corporate bonds [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Beginning Balance	0	3.4
Purchases, sales, settlements, net	0.7	(3.4)
Unrealized gains	0	0
Ending Balance	0.7	0
Mortgage and other asset backed securities [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Beginning Balance		0.5
Purchases, sales, settlements, net		(0.5)
Unrealized gains		0
Ending Balance		0
U.S. government securities [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Beginning Balance	0.1	0.1
Purchases, sales, settlements, net	0	0
Unrealized gains	0	0
Ending Balance	0.1	0.1
Other securities [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Beginning Balance	7.8	0
Purchases, sales, settlements, net	19.0	7.9
Unrealized gains	(2.3)	(0.1)
Ending Balance	$ 24.5	$ 7.8