Supplemental Guarantor Condensed Financial Information (Condensed Statements Of Operations and Comprehensive Income (Loss)) (Details) - USD ($) $ in Millions	3 Months Ended								12 Months Ended
	Dec. 31, 2017	Sep. 29, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2016	Sep. 30, 2016	Jul. 01, 2016	Apr. 01, 2016	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Schedule of Statements Of Operations and Comprehensive Income (Loss) [Line Items]
Customers									$ 3,837.2	$ 3,858.4	$ 4,514.5
Intercompany									0.0	0.0	0.0
Net sales	$ 981.9	$ 994.0	$ 943.1	$ 918.2	$ 910.0	$ 924.5	$ 1,021.2	$ 1,002.7	3,837.2	3,858.4	4,514.5
Cost of sales									3,411.1	3,451.3	4,082.1
Gross profit	97.4	109.2	100.9	118.6	74.1	102.9	119.2	110.9	426.1	407.1	432.4
Selling, general and administrative expenses									416.8	408.9	412.3
Goodwill impairment charges									0.0	9.0	3.9
Intangible asset impairment charges									0.0	7.5	1.7
Operating income (loss)									9.3	(18.3)	14.5
Other income (expense)									28.5	7.2	(71.3)
Interest expense									(78.7)	(89.5)	(97.0)
Interest income									2.0	2.5	2.7
Interest income (expense), total									(76.7)	(87.0)	(94.3)
Income (loss) before income taxes									(38.9)	(98.1)	(151.1)
Income tax (provision) benefit									(15.8)	3.7	14.8
Equity in net earnings of affiliated companies and subsidiaries									0.0	0.9	0.5
Net income (loss) from continuing operations									(54.7)	(93.5)	(135.8)
Net income (loss) including noncontrolling interest	15.8	(14.2)	(68.7)	12.4	(103.7)	(13.7)	28.3	(4.4)	(54.7)	(93.5)	(135.8)
Less: net income (loss) attributable to noncontrolling interest	(0.2)	0.0	2.1	0.0	0.9	0.6	(1.5)	0.3	1.9	0.3	(13.9)
Net income (loss) attributable to Company common shareholders	16.0	(14.2)	(70.8)	12.4	(104.6)	(14.3)	29.8	(4.7)	(56.6)	(93.8)	(121.9)
Comprehensive income (loss):
Net income (loss)	$ 15.8	$ (14.2)	$ (68.7)	$ 12.4	$ (103.7)	$ (13.7)	$ 28.3	$ (4.4)	(54.7)	(93.5)	(135.8)
Currency translation gain (loss)									72.9	47.9	(100.2)
Defined benefit plan adjustments, net of tax									(6.0)	6.6	15.1
Comprehensive income (loss), net of tax									12.2	(39.0)	(220.9)
Comprehensive income (loss) attributable to noncontrolling interest, net of tax									13.2	1.0	(22.2)
Comprehensive income (loss) attributable to Company common shareholders, net of tax									(1.0)	(40.0)	(198.7)
Eliminations
Schedule of Statements Of Operations and Comprehensive Income (Loss) [Line Items]
Customers									0.0	0.0	0.0
Intercompany									(429.5)	(424.9)	(445.9)
Net sales									(429.5)	(424.9)	(445.9)
Cost of sales									(359.0)	(361.7)	(370.3)
Gross profit									(70.5)	(63.2)	(75.6)
Selling, general and administrative expenses									(70.5)	(63.2)	(75.6)
Goodwill impairment charges									0.0	0.0	0.0
Intangible asset impairment charges									0.0	0.0	0.0
Operating income (loss)									0.0	0.0	0.0
Other income (expense)									0.0	0.0	0.0
Interest expense									33.7	60.7	63.8
Interest income									(33.7)	(60.7)	(63.8)
Interest income (expense), total									0.0	0.0	0.0
Income (loss) before income taxes									0.0	0.0	0.0
Income tax (provision) benefit									0.0	0.0	0.0
Equity in net earnings of affiliated companies and subsidiaries									171.4	159.6	267.1
Net income (loss) from continuing operations									171.4	159.6	267.1
Net income (loss) including noncontrolling interest									171.4	159.6	267.1
Less: net income (loss) attributable to noncontrolling interest									0.0	0.0	0.0
Net income (loss) attributable to Company common shareholders									171.4	159.6	267.1
Comprehensive income (loss):
Net income (loss)									171.4	159.6	267.1
Currency translation gain (loss)									(97.2)	(92.1)	171.6
Defined benefit plan adjustments, net of tax									4.8	(7.2)	(25.1)
Comprehensive income (loss), net of tax									79.0	60.3	413.6
Comprehensive income (loss) attributable to noncontrolling interest, net of tax									0.0	0.0	0.0
Comprehensive income (loss) attributable to Company common shareholders, net of tax									79.0	60.3	413.6
Parent | Reportable Legal Entities
Schedule of Statements Of Operations and Comprehensive Income (Loss) [Line Items]
Customers									0.0	0.0	0.0
Intercompany									70.5	63.2	75.6
Net sales									70.5	63.2	75.6
Cost of sales									0.0	0.0	0.0
Gross profit									70.5	63.2	75.6
Selling, general and administrative expenses									67.6	111.8	75.6
Goodwill impairment charges									0.0	0.0	0.0
Intangible asset impairment charges									0.0	0.0	0.0
Operating income (loss)									2.9	(48.6)	0.0
Other income (expense)									0.0	0.0	0.7
Interest expense									(57.9)	(57.6)	(58.2)
Interest income									28.4	55.6	56.2
Interest income (expense), total									(29.5)	(2.0)	(2.0)
Income (loss) before income taxes									(26.6)	(50.6)	(1.3)
Income tax (provision) benefit									79.5	9.7	0.3
Equity in net earnings of affiliated companies and subsidiaries									(109.5)	(52.9)	(120.9)
Net income (loss) from continuing operations									(56.6)	(93.8)	(121.9)
Net income (loss) including noncontrolling interest									(56.6)	(93.8)	(121.9)
Less: net income (loss) attributable to noncontrolling interest									0.0	0.0	0.0
Net income (loss) attributable to Company common shareholders									(56.6)	(93.8)	(121.9)
Comprehensive income (loss):
Net income (loss)									(56.6)	(93.8)	(121.9)
Currency translation gain (loss)									61.6	47.2	(100.2)
Defined benefit plan adjustments, net of tax									(6.0)	6.6	15.1
Comprehensive income (loss), net of tax									(1.0)	(40.0)	(207.0)
Comprehensive income (loss) attributable to noncontrolling interest, net of tax									0.0	0.0	0.0
Comprehensive income (loss) attributable to Company common shareholders, net of tax									(1.0)	(40.0)	(207.0)
Guarantor Subsidiaries | Reportable Legal Entities
Schedule of Statements Of Operations and Comprehensive Income (Loss) [Line Items]
Customers									1,905.2	1,730.3	1,926.4
Intercompany									180.9	206.4	219.2
Net sales									2,086.1	1,936.7	2,145.6
Cost of sales									1,848.0	1,703.0	1,889.9
Gross profit									238.1	233.7	255.7
Selling, general and administrative expenses									189.8	127.9	185.1
Goodwill impairment charges									0.0	7.4	0.0
Intangible asset impairment charges									0.0	5.0	0.0
Operating income (loss)									48.3	93.4	70.6
Other income (expense)									4.4	1.5	(8.1)
Interest expense									(36.8)	(65.3)	(66.2)
Interest income									5.2	5.1	7.5
Interest income (expense), total									(31.6)	(60.2)	(58.7)
Income (loss) before income taxes									21.1	34.7	3.8
Income tax (provision) benefit									(68.7)	18.4	21.2
Equity in net earnings of affiliated companies and subsidiaries									(61.9)	(106.0)	(145.9)
Net income (loss) from continuing operations									(109.5)	(52.9)	(120.9)
Net income (loss) including noncontrolling interest									(109.5)	(52.9)	(120.9)
Less: net income (loss) attributable to noncontrolling interest									0.0	0.0	0.0
Net income (loss) attributable to Company common shareholders									(109.5)	(52.9)	(120.9)
Comprehensive income (loss):
Net income (loss)									(109.5)	(52.9)	(120.9)
Currency translation gain (loss)									61.6	47.2	(100.2)
Defined benefit plan adjustments, net of tax									(6.0)	6.6	15.1
Comprehensive income (loss), net of tax									(53.9)	0.9	(206.0)
Comprehensive income (loss) attributable to noncontrolling interest, net of tax									0.0	0.0	0.0
Comprehensive income (loss) attributable to Company common shareholders, net of tax									(53.9)	0.9	(206.0)
Non- Guarantor Subsidiaries | Reportable Legal Entities
Schedule of Statements Of Operations and Comprehensive Income (Loss) [Line Items]
Customers									1,932.0	2,128.1	2,588.1
Intercompany									178.1	155.3	151.1
Net sales									2,110.1	2,283.4	2,739.2
Cost of sales									1,922.1	2,110.0	2,562.5
Gross profit									188.0	173.4	176.7
Selling, general and administrative expenses									229.9	232.4	227.2
Goodwill impairment charges									0.0	1.6	3.9
Intangible asset impairment charges									0.0	2.5	1.7
Operating income (loss)									(41.9)	(63.1)	(56.1)
Other income (expense)									24.1	5.7	(63.9)
Interest expense									(17.7)	(27.3)	(36.4)
Interest income									2.1	2.5	2.8
Interest income (expense), total									(15.6)	(24.8)	(33.6)
Income (loss) before income taxes									(33.4)	(82.2)	(153.6)
Income tax (provision) benefit									(26.6)	(24.4)	(6.7)
Equity in net earnings of affiliated companies and subsidiaries									0.0	0.2	0.2
Net income (loss) from continuing operations									(60.0)	(106.4)	(160.1)
Net income (loss) including noncontrolling interest									(60.0)	(106.4)	(160.1)
Less: net income (loss) attributable to noncontrolling interest									1.9	0.3	(13.9)
Net income (loss) attributable to Company common shareholders									(61.9)	(106.7)	(146.2)
Comprehensive income (loss):
Net income (loss)									(60.0)	(106.4)	(160.1)
Currency translation gain (loss)									46.9	45.6	(71.4)
Defined benefit plan adjustments, net of tax									1.2	0.6	10.0
Comprehensive income (loss), net of tax									(11.9)	(60.2)	(221.5)
Comprehensive income (loss) attributable to noncontrolling interest, net of tax									13.2	1.0	(22.2)
Comprehensive income (loss) attributable to Company common shareholders, net of tax									$ (25.1)	$ (61.2)	$ (199.3)