Supplemental Guarantor Condensed Financial Information (Condensed Statements Of Cash Flows) (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 30, 2018	Mar. 31, 2017
Schedule of Cash Flows [Line Items]
Net cash flows of operating activities	$ (85.5)	$ (88.5)
Cash flows of investing activities:
Capital expenditures	(13.0)	(35.2)
Proceeds from properties sold	0.0	0.3
Disposal of subsidiaries, net of cash disposed of	0.0	5.3
Intercompany accounts	0.0
Other		0.0
Net cash flows of investing activities	(13.0)	(29.6)
Cash flows of financing activities:
Dividends paid to shareholders	(9.2)	(9.4)
Intercompany accounts	0.0	0.0
Proceeds from debt	538.8	731.7
Repayments of debt	(459.5)	(622.4)
Net cash flows of financing activities	70.1	99.9
Effect of exchange rate changes on cash and cash equivalents	(1.9)	0.8
Increase (decrease) in cash, cash equivalents and restricted cash	(30.3)	(17.4)
Cash, cash equivalents and restricted cash – beginning of period	96.2	103.6
Cash, cash equivalents and restricted cash – end of period	65.9	86.2
Reportable Legal Entities | Parent
Schedule of Cash Flows [Line Items]
Net cash flows of operating activities	3.5	(26.1)
Cash flows of investing activities:
Capital expenditures	0.0	0.0
Proceeds from properties sold		0.0
Disposal of subsidiaries, net of cash disposed of		0.0
Intercompany accounts	0.0
Other		0.0
Net cash flows of investing activities	0.0	0.0
Cash flows of financing activities:
Dividends paid to shareholders	(9.2)	(9.4)
Intercompany accounts	5.7	35.5
Proceeds from debt	0.0	0.0
Repayments of debt	0.0	0.0
Net cash flows of financing activities	(3.5)	26.1
Effect of exchange rate changes on cash and cash equivalents	0.0	0.0
Increase (decrease) in cash, cash equivalents and restricted cash	0.0	0.0
Cash, cash equivalents and restricted cash – beginning of period	0.0	0.0
Cash, cash equivalents and restricted cash – end of period	0.0	0.0
Reportable Legal Entities | Guarantor Subsidiaries
Schedule of Cash Flows [Line Items]
Net cash flows of operating activities	(25.1)	(61.6)
Cash flows of investing activities:
Capital expenditures	(5.1)	(20.8)
Proceeds from properties sold		0.1
Disposal of subsidiaries, net of cash disposed of		5.3
Intercompany accounts	4.1
Other		0.2
Net cash flows of investing activities	(1.0)	(15.2)
Cash flows of financing activities:
Dividends paid to shareholders	0.0	0.0
Intercompany accounts	(20.0)	(39.9)
Proceeds from debt	306.0	645.3
Repayments of debt	(258.2)	(527.5)
Net cash flows of financing activities	27.8	77.9
Effect of exchange rate changes on cash and cash equivalents	(1.7)	0.6
Increase (decrease) in cash, cash equivalents and restricted cash	0.0	1.7
Cash, cash equivalents and restricted cash – beginning of period	0.0	1.0
Cash, cash equivalents and restricted cash – end of period	0.0	2.7
Reportable Legal Entities | Non-Guarantor Subsidiaries
Schedule of Cash Flows [Line Items]
Net cash flows of operating activities	(63.9)	(0.8)
Cash flows of investing activities:
Capital expenditures	(7.9)	(14.4)
Proceeds from properties sold		0.2
Disposal of subsidiaries, net of cash disposed of		0.0
Intercompany accounts	0.0
Other		(0.2)
Net cash flows of investing activities	(7.9)	(14.4)
Cash flows of financing activities:
Dividends paid to shareholders	0.0	0.0
Intercompany accounts	10.2	4.4
Proceeds from debt	232.8	86.4
Repayments of debt	(201.3)	(94.9)
Net cash flows of financing activities	41.7	(4.1)
Effect of exchange rate changes on cash and cash equivalents	(0.2)	0.2
Increase (decrease) in cash, cash equivalents and restricted cash	(30.3)	(19.1)
Cash, cash equivalents and restricted cash – beginning of period	96.2	102.6
Cash, cash equivalents and restricted cash – end of period	65.9	83.5
Eliminations
Schedule of Cash Flows [Line Items]
Net cash flows of operating activities	0.0	0.0
Cash flows of investing activities:
Capital expenditures	0.0	0.0
Proceeds from properties sold		0.0
Disposal of subsidiaries, net of cash disposed of		0.0
Intercompany accounts	(4.1)
Other		0.0
Net cash flows of investing activities	(4.1)	0.0
Cash flows of financing activities:
Dividends paid to shareholders	0.0	0.0
Intercompany accounts	4.1	0.0
Proceeds from debt	0.0	0.0
Repayments of debt	0.0	0.0
Net cash flows of financing activities	4.1	0.0
Effect of exchange rate changes on cash and cash equivalents	0.0	0.0
Increase (decrease) in cash, cash equivalents and restricted cash	0.0	0.0
Cash, cash equivalents and restricted cash – beginning of period	0.0	0.0
Cash, cash equivalents and restricted cash – end of period	$ 0.0	$ 0.0