Supplemental Guarantor Condensed Financial Information (Condensed Statements Of Cash Flows) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Schedule of Cash Flows [Line Items]
Net cash flows of operating activities	$ 154.6	$ 198.9	$ 133.2
Capital expenditures	(84.1)	(61.5)	(89.6)
Proceeds from properties sold	1.5	1.8	21.4
Reduction of cash due to Venezuela deconsolidation	0.0	(8.2)	0.0
Disposal of subsidiaries, net of cash disposed of	81.8	78.4	52.4
Intercompany accounts			0.0
Other	0.2	0.0	(0.2)
Net cash flows of investing activities	(0.6)	10.5	(16.0)
Dividends paid to shareholders	(35.6)	(35.3)	(35.4)
Intercompany accounts	0.0	0.0	0.0
Proceeds from debt	1,516.2	2,945.5	2,689.9
Repayments of debt	(1,635.2)	(3,167.2)	(2,740.3)
Purchase of noncontrolling interest	(18.0)	0.0	(0.7)
Dividends paid to noncontrolling interest	(0.1)	(2.5)	(6.2)
Proceeds from exercise of stock options	1.2	0.2	0.3
Proceeds from sale leaseback transaction	6.2	0.0	0.0
Repurchase of common shares	0.0	0.0	(30.7)
Net cash flows of financing activities	(165.3)	(259.3)	(123.1)
Effect of exchange rate changes on cash and cash equivalents	0.0	(43.5)	(205.8)
Cash held for sale	0.0	0.0	(1.3)
Increase (decrease) in cash and cash equivalents	(11.3)	(93.4)	(213.0)
Cash and cash equivalents — beginning of year	112.4	205.8	418.8
Cash and cash equivalents — end of year	101.1	112.4	205.8
Eliminations [Member]
Schedule of Cash Flows [Line Items]
Net cash flows of operating activities	0.0	(11.7)	(15.1)
Capital expenditures	0.0	0.0	0.0
Proceeds from properties sold	0.0	0.0	0.0
Reduction of cash due to Venezuela deconsolidation		0.0
Disposal of subsidiaries, net of cash disposed of	0.0	0.0	0.0
Intercompany accounts			19.8
Other	0.0	0.0	0.0
Net cash flows of investing activities	0.0	0.0	19.8
Dividends paid to shareholders	0.0	0.0	0.0
Intercompany accounts	0.0	11.7	(4.7)
Proceeds from debt	0.0	0.0	0.0
Repayments of debt	0.0	0.0	0.0
Purchase of noncontrolling interest	0.0		0.0
Dividends paid to noncontrolling interest	0.0	0.0	0.0
Proceeds from exercise of stock options	0.0	0.0	0.0
Proceeds from sale leaseback transaction	0.0
Repurchase of common shares			0.0
Net cash flows of financing activities	0.0	11.7	(4.7)
Effect of exchange rate changes on cash and cash equivalents	0.0	0.0	0.0
Cash held for sale			0.0
Increase (decrease) in cash and cash equivalents	0.0	0.0	0.0
Cash and cash equivalents — beginning of year	0.0	0.0	0.0
Cash and cash equivalents — end of year	0.0	0.0	0.0
Parent Company [Member]
Schedule of Cash Flows [Line Items]
Net cash flows of operating activities	6.3	1.8	0.6
Capital expenditures	0.0	0.0	0.0
Proceeds from properties sold	0.0	0.0	0.0
Reduction of cash due to Venezuela deconsolidation		0.0
Disposal of subsidiaries, net of cash disposed of	0.0	0.0	0.0
Intercompany accounts			0.0
Other	0.0	0.0	0.0
Net cash flows of investing activities	0.0	0.0	0.0
Dividends paid to shareholders	(35.6)	(35.3)	(35.4)
Intercompany accounts	28.1	158.3	65.0
Proceeds from debt	0.0	0.0	0.0
Repayments of debt	0.0	(125.0)	0.0
Purchase of noncontrolling interest	0.0		0.0
Dividends paid to noncontrolling interest	0.0	0.0	0.0
Proceeds from exercise of stock options	1.2	0.2	0.3
Proceeds from sale leaseback transaction	0.0
Repurchase of common shares			(30.7)
Net cash flows of financing activities	(6.3)	(1.8)	(0.8)
Effect of exchange rate changes on cash and cash equivalents	0.0	0.0	0.0
Cash held for sale			0.0
Increase (decrease) in cash and cash equivalents	0.0	0.0	(0.2)
Cash and cash equivalents — beginning of year	0.0	0.0	0.2
Cash and cash equivalents — end of year	0.0	0.0	0.0
Guarantor Subsidiaries [Member]
Schedule of Cash Flows [Line Items]
Net cash flows of operating activities	63.2	179.2	116.9
Capital expenditures	(48.0)	(18.6)	(34.3)
Proceeds from properties sold	0.7	0.1	16.6
Reduction of cash due to Venezuela deconsolidation		0.0
Disposal of subsidiaries, net of cash disposed of	76.8	88.4	0.0
Intercompany accounts			(19.8)
Other	(1.0)	(0.2)	(1.6)
Net cash flows of investing activities	28.5	69.7	(39.1)
Dividends paid to shareholders	0.0	0.0	0.0
Intercompany accounts	(42.0)	(208.4)	49.3
Proceeds from debt	1,114.0	2,082.1	1,406.6
Repayments of debt	(1,165.7)	(2,091.3)	(1,494.9)
Purchase of noncontrolling interest	0.0		(1.5)
Dividends paid to noncontrolling interest	0.0	0.0	0.0
Proceeds from exercise of stock options	0.0	0.0	0.0
Proceeds from sale leaseback transaction	0.0
Repurchase of common shares			0.0
Net cash flows of financing activities	(93.7)	(217.6)	(40.5)
Effect of exchange rate changes on cash and cash equivalents	2.2	(31.7)	(38.3)
Cash held for sale			0.0
Increase (decrease) in cash and cash equivalents	0.2	(0.4)	(1.0)
Cash and cash equivalents — beginning of year	0.8	1.2	2.2
Cash and cash equivalents — end of year	1.0	0.8	1.2
Non-Guarantor Subsidiaries [Member]
Schedule of Cash Flows [Line Items]
Net cash flows of operating activities	85.1	29.6	30.8
Capital expenditures	(36.1)	(42.9)	(55.3)
Proceeds from properties sold	0.8	1.7	4.8
Reduction of cash due to Venezuela deconsolidation		(8.2)
Disposal of subsidiaries, net of cash disposed of	5.0	(10.0)	52.4
Intercompany accounts			0.0
Other	1.2	0.2	1.4
Net cash flows of investing activities	(29.1)	(59.2)	3.3
Dividends paid to shareholders	0.0	0.0	0.0
Intercompany accounts	13.9	38.4	(109.6)
Proceeds from debt	402.2	863.4	1,283.3
Repayments of debt	(469.5)	(950.9)	(1,245.4)
Purchase of noncontrolling interest	(18.0)		0.8
Dividends paid to noncontrolling interest	(0.1)	(2.5)	(6.2)
Proceeds from exercise of stock options	0.0	0.0	0.0
Proceeds from sale leaseback transaction	6.2
Repurchase of common shares			0.0
Net cash flows of financing activities	(65.3)	(51.6)	(77.1)
Effect of exchange rate changes on cash and cash equivalents	(2.2)	(11.8)	(167.5)
Cash held for sale			(1.3)
Increase (decrease) in cash and cash equivalents	(11.5)	(93.0)	(211.8)
Cash and cash equivalents — beginning of year	111.6	204.6	416.4
Cash and cash equivalents — end of year	$ 100.1	$ 111.6	$ 204.6