Supplemental Guarantor Condensed Financial Information (Condensed Statements Of Operations and Comprehensive Income (Loss)) (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jul. 01, 2016	Jun. 30, 2017	Jul. 01, 2016
Net sales:
Customers	$ 943.1	$ 1,021.2	$ 1,861.3	$ 2,023.9
Intercompany	0.0	0.0	0.0	0.0
Net sales	943.1	1,021.2	1,861.3	2,023.9
Cost of sales	842.2	902.0	1,641.8	1,793.8
Gross profit	100.9	119.2	219.5	230.1
Selling, general and administrative expenses	123.7	63.4	218.5	151.9
Goodwill impairment charges	0.0	0.0	0.0	1.6
Intangible asset impairment charges	0.0	2.5	0.0	2.8
Operating income (loss)	(22.8)	53.3	1.0	73.8
Other income (expense)	(7.8)	8.0	7.2	6.8
Interest income (expense):
Interest expense	(19.4)	(22.8)	(40.1)	(44.7)
Interest income	0.5	0.5	1.1	1.0
Interest income (expense), total	(18.9)	(22.3)	(39.0)	(43.7)
Income (loss) before income taxes	(49.5)	39.0	(30.8)	36.9
Income tax (provision) benefit	(19.2)	(11.0)	(25.5)	(13.4)
Equity in net earnings of affiliated companies and subsidiaries	0.0	0.3	0.0	0.4
Net income (loss) including noncontrolling interest	(68.7)	28.3	(56.3)	23.9
Less: net income (loss) attributable to noncontrolling interest	2.1	(1.5)	2.1	(1.2)
Net income (loss) attributable to Company common shareholders	(70.8)	29.8	(58.4)	25.1
Comprehensive income (loss):
Net income (loss)	(68.7)	28.3	(56.3)	23.9
Currency translation gain (loss)	41.8	(0.3)	50.4	31.2
Defined benefit plan adjustments, net of tax	1.4	1.3	2.2	2.6
Comprehensive income (loss), net of tax	(25.5)	29.3	(3.7)	57.7
Comprehensive income (loss) attributable to noncontrolling interest, net of tax	13.5	(1.8)	13.4	(1.3)
Comprehensive income (loss) attributable to Company common shareholders, net of tax	(39.0)	31.1	(17.1)	59.0
Eliminations
Net sales:
Customers	0.0	0.0	0.0	0.0
Intercompany	(98.1)	(104.5)	(215.6)	(231.4)
Net sales	(98.1)	(104.5)	(215.6)	(231.4)
Cost of sales	(81.5)	(87.9)	(180.8)	(197.7)
Gross profit	(16.6)	(16.6)	(34.8)	(33.7)
Selling, general and administrative expenses	(16.6)	(16.6)	(34.8)	(33.7)
Goodwill impairment charges				0.0
Intangible asset impairment charges		0.0		0.0
Operating income (loss)	0.0	0.0	0.0	0.0
Other income (expense)	0.0	0.0	0.0	0.0
Interest income (expense):
Interest expense	14.0	15.0	28.5	29.9
Interest income	(14.0)	(15.0)	(28.5)	(29.9)
Interest income (expense), total	0.0	0.0	0.0	0.0
Income (loss) before income taxes	0.0	0.0	0.0	0.0
Income tax (provision) benefit	0.0	0.0	0.0	0.0
Equity in net earnings of affiliated companies and subsidiaries	118.2	(8.5)	103.4	(3.1)
Net income (loss) including noncontrolling interest	118.2	(8.5)	103.4	(3.1)
Less: net income (loss) attributable to noncontrolling interest	0.0	0.0	0.0	0.0
Net income (loss) attributable to Company common shareholders	118.2	(8.5)	103.4	(3.1)
Comprehensive income (loss):
Net income (loss)	118.2	(8.5)	103.4	(3.1)
Currency translation gain (loss)	(49.6)	(0.4)	(66.4)	(58.3)
Defined benefit plan adjustments, net of tax	(0.3)	(1.6)	(1.5)	(3.2)
Comprehensive income (loss), net of tax	68.3	(10.5)	35.5	(64.6)
Comprehensive income (loss) attributable to noncontrolling interest, net of tax	0.0	0.0	0.0	0.0
Comprehensive income (loss) attributable to Company common shareholders, net of tax	68.3	(10.5)	35.5	(64.6)
Parent
Net sales:
Customers	0.0	0.0	0.0	0.0
Intercompany	16.6	16.6	34.8	33.7
Net sales	16.6	16.6	34.8	33.7
Cost of sales	0.0	0.0	0.0	0.0
Gross profit	16.6	16.6	34.8	33.7
Selling, general and administrative expenses	17.8	12.9	25.8	31.6
Goodwill impairment charges				0.0
Intangible asset impairment charges		0.0		0.0
Operating income (loss)	(1.2)	3.7	9.0	2.1
Other income (expense)	0.0	0.0	0.0	0.0
Interest income (expense):
Interest expense	(14.5)	(14.4)	(28.8)	(28.7)
Interest income	12.7	13.7	25.9	27.5
Interest income (expense), total	(1.8)	(0.7)	(2.9)	(1.2)
Income (loss) before income taxes	(3.0)	3.0	6.1	0.9
Income tax (provision) benefit	(7.8)	(1.1)	(12.2)	(1.0)
Equity in net earnings of affiliated companies and subsidiaries	(60.0)	27.9	(52.3)	25.2
Net income (loss) including noncontrolling interest	(70.8)	29.8	(58.4)	25.1
Less: net income (loss) attributable to noncontrolling interest	0.0	0.0	0.0	0.0
Net income (loss) attributable to Company common shareholders	(70.8)	29.8	(58.4)	25.1
Comprehensive income (loss):
Net income (loss)	(70.8)	29.8	(58.4)	25.1
Currency translation gain (loss)	31.1	0.0	39.8	31.3
Defined benefit plan adjustments, net of tax	0.7	1.3	1.5	2.6
Comprehensive income (loss), net of tax	(39.0)	31.1	(17.1)	59.0
Comprehensive income (loss) attributable to noncontrolling interest, net of tax	0.0	0.0	0.0	0.0
Comprehensive income (loss) attributable to Company common shareholders, net of tax	(39.0)	31.1	(17.1)	59.0
Guarantor Subsidiaries
Net sales:
Customers	489.1	453.2	956.0	900.4
Intercompany	40.8	51.2	89.4	118.2
Net sales	529.9	504.4	1,045.4	1,018.6
Cost of sales	471.7	442.5	915.7	896.4
Gross profit	58.2	61.9	129.7	122.2
Selling, general and administrative expenses	42.8	(3.6)	106.6	41.3
Goodwill impairment charges				0.0
Intangible asset impairment charges		0.0		0.3
Operating income (loss)	15.4	65.5	23.1	80.6
Other income (expense)	(1.2)	(0.5)	1.6	(0.3)
Interest income (expense):
Interest expense	(15.0)	(15.9)	(30.0)	(32.1)
Interest income	1.3	1.4	2.6	2.6
Interest income (expense), total	(13.7)	(14.5)	(27.4)	(29.5)
Income (loss) before income taxes	0.5	50.5	(2.7)	50.8
Income tax (provision) benefit	(2.3)	(3.4)	1.5	(3.8)
Equity in net earnings of affiliated companies and subsidiaries	(58.2)	(19.2)	(51.1)	(21.8)
Net income (loss) including noncontrolling interest	(60.0)	27.9	(52.3)	25.2
Less: net income (loss) attributable to noncontrolling interest	0.0	0.0	0.0	0.0
Net income (loss) attributable to Company common shareholders	(60.0)	27.9	(52.3)	25.2
Comprehensive income (loss):
Net income (loss)	(60.0)	27.9	(52.3)	25.2
Currency translation gain (loss)	31.1	0.0	39.8	31.3
Defined benefit plan adjustments, net of tax	0.7	1.3	1.5	2.6
Comprehensive income (loss), net of tax	(28.2)	29.2	(11.0)	59.1
Comprehensive income (loss) attributable to noncontrolling interest, net of tax	0.0	0.0	0.0	0.0
Comprehensive income (loss) attributable to Company common shareholders, net of tax	(28.2)	29.2	(11.0)	59.1
Non-Guarantor Subsidiaries
Net sales:
Customers	454.0	568.0	905.3	1,123.5
Intercompany	40.7	36.7	91.4	79.5
Net sales	494.7	604.7	996.7	1,203.0
Cost of sales	452.0	547.4	906.9	1,095.1
Gross profit	42.7	57.3	89.8	107.9
Selling, general and administrative expenses	79.7	70.7	120.9	112.7
Goodwill impairment charges				1.6
Intangible asset impairment charges		2.5		2.5
Operating income (loss)	(37.0)	(15.9)	(31.1)	(8.9)
Other income (expense)	(6.6)	8.5	5.6	7.1
Interest income (expense):
Interest expense	(3.9)	(7.5)	(9.8)	(13.8)
Interest income	0.5	0.4	1.1	0.8
Interest income (expense), total	(3.4)	(7.1)	(8.7)	(13.0)
Income (loss) before income taxes	(47.0)	(14.5)	(34.2)	(14.8)
Income tax (provision) benefit	(9.1)	(6.5)	(14.8)	(8.6)
Equity in net earnings of affiliated companies and subsidiaries	0.0	0.1	0.0	0.1
Net income (loss) including noncontrolling interest	(56.1)	(20.9)	(49.0)	(23.3)
Less: net income (loss) attributable to noncontrolling interest	2.1	(1.5)	2.1	(1.2)
Net income (loss) attributable to Company common shareholders	(58.2)	(19.4)	(51.1)	(22.1)
Comprehensive income (loss):
Net income (loss)	(56.1)	(20.9)	(49.0)	(23.3)
Currency translation gain (loss)	29.2	0.1	37.2	26.9
Defined benefit plan adjustments, net of tax	0.3	0.3	0.7	0.6
Comprehensive income (loss), net of tax	(26.6)	(20.5)	(11.1)	4.2
Comprehensive income (loss) attributable to noncontrolling interest, net of tax	13.5	(1.8)	13.4	(1.3)
Comprehensive income (loss) attributable to Company common shareholders, net of tax	$ (40.1)	$ (18.7)	$ (24.5)	$ 5.5