Fair Value Measurements (Reconciliation of the Beginning and Ending Balances for Level 3 Liabilities) (Details) (Significant Unobservable Inputs (Level 3) [Member], Fair Value, Measurements, Recurring [Member], USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 29, 2012	Dec. 31, 2011
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance, end of year	$ 21.8	$ 26.3
Contingent Consideration [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance, beginning of year	26.3	3.0
Additions		23.2
Settlements	(1.5)
Unrealized losses (gains)	(3.0)	(0.1)
Balance, end of year	$ 21.8	$ 26.3