Employee Benefit Plans (Savings Plan) (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 28, 2014	Dec. 29, 2013	Dec. 30, 2012
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, 401(k) Savings Plan, Employer Contribution Match of Employees Eligible Compensation	100.00%
Defined Benefit Plan, 401(k) Savings Plan, Maximum Employee Match Percent for Employer Match	5.00%
Defined Benefit, 401(k) Savings Plan Expense	$ 12.2	$ 12.8	$ 12.3
November 2011 Caliper Life Sciences [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, 401(k) Savings Plan, Employer Contribution Match of Employees Eligible Compensation		100.00%	50.00%
Defined Benefit Plan, 401(k) Savings Plan, Maximum Employee Match Percent for Employer Match		5.00%	5.00%