Condensed Consolidating Financial Statements - Statement of Cash Flows (Details) (USD $) In Millions, unless otherwise specified	6 Months Ended
	Jun. 24, 2012	Jun. 26, 2011
Condensed Financial Statements, Captions [Line Items]
Net cash provided by (used in) operating activities	$ 9.8	$ (10.1)
Investing activities:
Cash paid for acquisitions, net of cash acquired	(21.5)	(249.2)
Decrease in restricted cash	0.3	1.2
Capital expenditures	(6.2)	(2.7)
Net cash used in investing activities from continuing operations	(27.4)	(250.7)
Financing activities:
Proceeds from the issuance of long-term debt	0	305.0
Proceeds from the issuance of common stock	97.0	61.1
Debt issuance costs	(1.0)	(14.6)
Repayment of debt	(0.5)	(2.2)
Cash paid for contingent acquisition consideration	(2.5)	0
Financings from affiliated companies	0	0
Other, net	(0.3)	1.0
Net cash provided by financing activities from continuing operations	92.7	350.3
Net cash flows of continuing operations	75.1	89.5
Net operating cash flows of discontinued operations	1.3	0.1
Effect of exchange rate changes on cash and cash equivalents	(0.3)	0
Net increase in cash and cash equivalents	76.1	89.6
Parent Company
Condensed Financial Statements, Captions [Line Items]
Net cash provided by (used in) operating activities	(40.5)	(45.8)
Investing activities:
Cash paid for acquisitions, net of cash acquired	(21.5)	(271.0)
Decrease in restricted cash	(0.4)	0.3
Capital expenditures	0	(0.1)
Net cash used in investing activities from continuing operations	(21.9)	(270.8)
Financing activities:
Proceeds from the issuance of long-term debt		305.0
Proceeds from the issuance of common stock	97.0	61.1
Debt issuance costs	(1.0)	(14.6)
Repayment of debt	0	0
Cash paid for contingent acquisition consideration	(2.5)	0
Financings from affiliated companies	43.0	25.0
Other, net	0	1.4
Net cash provided by financing activities from continuing operations	136.5	377.9
Net cash flows of continuing operations	74.1	61.3
Net operating cash flows of discontinued operations	0	0
Effect of exchange rate changes on cash and cash equivalents	0	0
Net increase in cash and cash equivalents	74.1	61.3
Guarantors on a Combined Basis
Condensed Financial Statements, Captions [Line Items]
Net cash provided by (used in) operating activities	43.2	37.4
Investing activities:
Cash paid for acquisitions, net of cash acquired	0	12.5
Decrease in restricted cash	0.7	0.9
Capital expenditures	(5.1)	(1.6)
Net cash used in investing activities from continuing operations	(4.4)	11.8
Financing activities:
Proceeds from the issuance of long-term debt		0
Proceeds from the issuance of common stock	0	0
Debt issuance costs	0	0
Repayment of debt	0	(1.9)
Cash paid for contingent acquisition consideration	0	0
Financings from affiliated companies	(43.0)	(27.4)
Other, net	(0.3)	(0.4)
Net cash provided by financing activities from continuing operations	(43.3)	(29.7)
Net cash flows of continuing operations	(4.5)	19.5
Net operating cash flows of discontinued operations	1.3	0.1
Effect of exchange rate changes on cash and cash equivalents	0	0
Net increase in cash and cash equivalents	(3.2)	19.6
Non-Guarantors on a Combined Basis
Condensed Financial Statements, Captions [Line Items]
Net cash provided by (used in) operating activities	7.1	(1.7)
Investing activities:
Cash paid for acquisitions, net of cash acquired	0	9.3
Decrease in restricted cash	0	0
Capital expenditures	(1.1)	(1.0)
Net cash used in investing activities from continuing operations	(1.1)	8.3
Financing activities:
Proceeds from the issuance of long-term debt		0
Proceeds from the issuance of common stock	0	0
Debt issuance costs	0	0
Repayment of debt	(0.5)	(0.3)
Cash paid for contingent acquisition consideration	0	0
Financings from affiliated companies	0	2.4
Other, net	0	0
Net cash provided by financing activities from continuing operations	(0.5)	2.1
Net cash flows of continuing operations	5.5	8.7
Net operating cash flows of discontinued operations	0	0
Effect of exchange rate changes on cash and cash equivalents	(0.3)	0
Net increase in cash and cash equivalents	5.2	8.7
Eliminations
Condensed Financial Statements, Captions [Line Items]
Net cash provided by (used in) operating activities	0	0
Investing activities:
Cash paid for acquisitions, net of cash acquired	0	0
Decrease in restricted cash	0	0
Capital expenditures	0	0
Net cash used in investing activities from continuing operations	0	0
Financing activities:
Proceeds from the issuance of long-term debt		0
Proceeds from the issuance of common stock	0	0
Debt issuance costs	0	0
Repayment of debt	0	0
Cash paid for contingent acquisition consideration	0	0
Financings from affiliated companies	0	0
Other, net	0	0
Net cash provided by financing activities from continuing operations	0	0
Net cash flows of continuing operations	0	0
Net operating cash flows of discontinued operations	0	0
Effect of exchange rate changes on cash and cash equivalents	0	0
Net increase in cash and cash equivalents	$ 0	$ 0