Condensed Consolidating Financial Statements - Statement of Cash Flows (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 29, 2013	Dec. 30, 2012	Dec. 25, 2011
Condensed Financial Statements, Captions [Line Items]
Net cash provided by (used in) operating activities	$ 22.6	$ 52.3	$ 5.2
Investing activities:
Cash paid for acquisitions, net of cash acquired	2.2	(149.4)	(391.1)
Decrease in restricted cash	0.4	0.6	3.0
Proceeds from the sale of discontinued operations	1.3	0.3	0
Investment in affiliated companies	0	0	0
Capital expenditures	(16.6)	(16.6)	(7.5)
Other, net		0.3
Net cash used in investing activities from continuing operations	(12.7)	(165.1)	(395.6)
Financing activities:
Proceeds from the issuance of common stock	0	97.0	61.1
Proceeds from the issuance of long-term debt	0	0	425.7
Cash paid for contingent acquisition consideration	(2.1)	(2.5)	0
Debt issuance costs paid	0	(1.2)	(22.1)
Purchase of treasury stock	0	0	(10.9)
Repayment of debt	(1.0)	(1.5)	(3.4)
Purchase of ESPP shares	1.1
Financing from affiliated companies	0	0	0
Other, net	0	(3.4)	2.0
Net cash provided by (used in) financing activities from continuing operations	(2.0)	90.9	452.4
Net cash flows of continuing operations	7.9	(21.9)	62.0
Net operating cash flows of discontinued operations	(1.3)	1.3	(2.7)
Effect of exchange rate changes on cash and cash equivalents	0.1	0	(0.5)
Net increase (decrease) in cash and cash equivalents	6.7	(20.6)	58.8
Parent Company
Condensed Financial Statements, Captions [Line Items]
Net cash provided by (used in) operating activities	(65.9)	(98.2)	(55.1)
Investing activities:
Cash paid for acquisitions, net of cash acquired	0	2.3	(421.0)
Decrease in restricted cash	0	0	1.4
Proceeds from the sale of discontinued operations	0
Investment in affiliated companies	0	(10.8)	0
Capital expenditures	(1.4)	(0.5)	(0.2)
Other, net		0
Net cash used in investing activities from continuing operations	(1.4)	(9.0)	(419.8)
Financing activities:
Proceeds from the issuance of common stock		97.0	61.1
Proceeds from the issuance of long-term debt			425.7
Cash paid for contingent acquisition consideration	0
Debt issuance costs paid		(1.2)	(22.1)
Purchase of treasury stock			(10.9)
Repayment of debt	0	0	0
Purchase of ESPP shares	1.1
Financing from affiliated companies	71.1	0	63.6
Other, net	0	(3.4)	2.0
Net cash provided by (used in) financing activities from continuing operations	72.2	92.4	519.4
Net cash flows of continuing operations	4.9	(14.8)	44.5
Net operating cash flows of discontinued operations	0	0	0
Effect of exchange rate changes on cash and cash equivalents	0	0	0
Net increase (decrease) in cash and cash equivalents	4.9	(14.8)	44.5
Guarantors on a Combined Basis
Condensed Financial Statements, Captions [Line Items]
Net cash provided by (used in) operating activities	87.5	144.5	60.5
Investing activities:
Cash paid for acquisitions, net of cash acquired	2.2	(151.7)	18.0
Decrease in restricted cash	0.4	0.6	1.6
Proceeds from the sale of discontinued operations	1.3
Investment in affiliated companies	(74.8)	0	(68.6)
Capital expenditures	(12.3)	(14.2)	(6.3)
Other, net		0.3
Net cash used in investing activities from continuing operations	(83.2)	(165.0)	(55.3)
Financing activities:
Proceeds from the issuance of common stock		0	0
Proceeds from the issuance of long-term debt			0
Cash paid for contingent acquisition consideration	(2.1)
Debt issuance costs paid		0	0
Purchase of treasury stock			0
Repayment of debt	0	(0.5)	(2.6)
Purchase of ESPP shares	0
Financing from affiliated companies	0	12.8	0
Other, net	0	0	0
Net cash provided by (used in) financing activities from continuing operations	(2.1)	12.3	(2.6)
Net cash flows of continuing operations	2.2	(8.2)	2.6
Net operating cash flows of discontinued operations	(1.3)	1.3	(2.2)
Effect of exchange rate changes on cash and cash equivalents	0	0	(0.3)
Net increase (decrease) in cash and cash equivalents	0.9	(6.9)	0.1
Non-Guarantors on a Combined Basis
Condensed Financial Statements, Captions [Line Items]
Net cash provided by (used in) operating activities	1.0	6.0	(0.2)
Investing activities:
Cash paid for acquisitions, net of cash acquired	0	0	11.9
Decrease in restricted cash	0	0	0
Proceeds from the sale of discontinued operations	0
Investment in affiliated companies	0	(2.0)	0
Capital expenditures	(2.9)	(1.9)	(1.0)
Other, net		0
Net cash used in investing activities from continuing operations	(2.9)	(3.9)	10.9
Financing activities:
Proceeds from the issuance of common stock		0	0
Proceeds from the issuance of long-term debt			0
Cash paid for contingent acquisition consideration	0
Debt issuance costs paid		0	0
Purchase of treasury stock			0
Repayment of debt	(1.0)	(1.0)	(0.8)
Purchase of ESPP shares	0
Financing from affiliated companies	3.7	0	5.0
Other, net	0	0	0
Net cash provided by (used in) financing activities from continuing operations	2.7	(1.0)	4.2
Net cash flows of continuing operations	0.8	1.1	14.9
Net operating cash flows of discontinued operations	0	0	(0.5)
Effect of exchange rate changes on cash and cash equivalents	0.1	0	(0.2)
Net increase (decrease) in cash and cash equivalents	0.9	1.1	14.2
Eliminations
Condensed Financial Statements, Captions [Line Items]
Net cash provided by (used in) operating activities	0	0	0
Investing activities:
Cash paid for acquisitions, net of cash acquired	0	0	0
Decrease in restricted cash	0	0	0
Proceeds from the sale of discontinued operations	0
Investment in affiliated companies	74.8	12.8	68.6
Capital expenditures	0	0	0
Other, net		0
Net cash used in investing activities from continuing operations	74.8	12.8	68.6
Financing activities:
Proceeds from the issuance of common stock		0	0
Proceeds from the issuance of long-term debt			0
Cash paid for contingent acquisition consideration	0
Debt issuance costs paid		0	0
Purchase of treasury stock			0
Repayment of debt	0	0	0
Purchase of ESPP shares	0
Financing from affiliated companies	(74.8)	(12.8)	(68.6)
Other, net	0	0	0
Net cash provided by (used in) financing activities from continuing operations	(74.8)	(12.8)	(68.6)
Net cash flows of continuing operations	0	0	0
Net operating cash flows of discontinued operations	0	0	0
Effect of exchange rate changes on cash and cash equivalents	0
Net increase (decrease) in cash and cash equivalents	$ 0	$ 0	$ 0