Condensed Consolidated Guarantor Financial Information (Schedule Of Condensed Consolidating Statements Of Income) (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended			9 Months Ended
	Sep. 30, 2012	Apr. 01, 2012	Sep. 25, 2011	Sep. 30, 2012	Sep. 25, 2011
Net revenues	$ 368,054		$ 362,741	$ 1,131,953	$ 1,089,490
Cost of goods sold	187,487		187,111	582,908	570,462
Gross profit	180,567		175,630	549,045	519,028
Selling, general and administrative expenses	114,878		101,582	332,965	313,130
Research and development expenses	14,760		12,316	40,015	35,802
Goodwill impairment		332,000		332,128
Restructuring and other impairment charges	1,088		(173)	84	3,598
(Gain) loss on sales of businesses and assets				(332)
Income (loss) from continuing operations before interest and taxes	49,841		61,905	(155,815)	166,498
Interest expense	18,493		19,177	54,944	51,108
Interest income	(340)		(318)	(1,324)	(676)
Loss on extinguishments of debt					15,413
Income (loss) from continuing operations before taxes	31,688		43,046	(209,435)	100,653
Taxes (benefit) on income (loss) from continuing operations	7,237		10,125	2,961	23,134
Income (loss) from continuing operations	24,451		32,921	(212,396)	77,519
Operating income (loss) from discontinued operations	(831)		14,588	(7,951)	75,705
Taxes (benefit) on income (loss) from discontinued operations	1,690		3,444	(1,668)	(3,522)
Income (loss) from discontinued operations	(2,521)		11,144	(6,283)	79,227
Net income	21,930		44,065	(218,679)	156,746
Less: Income from continuing operations attributable to noncontrolling interests	188		289	701	770
Income from discontinued operations attributable to noncontrolling interest			125		443
Net income (loss)	21,742		43,651	(219,380)	155,533
Other comprehensive income attributable to common shareholders	49,428		(47,299)	20,525	955
Comprehensive income (loss) attributable to common shareholders	71,170		(3,648)	(198,854)	156,488
Parent Company [Member]
Selling, general and administrative expenses	11,114		8,997	39,683	28,321
Restructuring and other impairment charges					11
(Gain) loss on sales of businesses and assets	1			(116,193)
Income (loss) from continuing operations before interest and taxes	(11,115)		(8,997)	76,510	(28,332)
Interest expense	36,105		31,613	109,206	89,697
Interest income	(107)		(133)	(360)	(247)
Loss on extinguishments of debt					15,413
Income (loss) from continuing operations before taxes	(47,113)		(40,477)	(32,336)	(133,195)
Taxes (benefit) on income (loss) from continuing operations	(16,624)		(14,712)	(51,685)	(49,333)
Equity in net income of consolidated subsidiaries	52,627		70,034	(238,187)	265,907
Income (loss) from continuing operations	22,138		44,269	(218,838)	182,045
Operating income (loss) from discontinued operations	(1,089)		(1,106)	(1,180)	(52,424)
Taxes (benefit) on income (loss) from discontinued operations	(693)		(488)	(638)	(25,912)
Income (loss) from discontinued operations	(396)		(618)	(542)	(26,512)
Net income	21,742		43,651	(219,380)	155,533
Net income (loss)	21,742		43,651	(219,380)	155,533
Other comprehensive income attributable to common shareholders	49,428		(47,299)	20,525	955
Comprehensive income (loss) attributable to common shareholders	71,170		(3,648)	(198,855)	156,488
Guarantor Subsidiaries [Member]
Net revenues	232,155		233,294	705,703	688,620
Cost of goods sold	130,840		140,745	409,801	417,464
Gross profit	101,315		92,549	295,902	271,156
Selling, general and administrative expenses	61,505		54,057	182,882	173,004
Research and development expenses	13,184		10,581	35,103	30,014
Goodwill impairment				331,779
Restructuring and other impairment charges	1,070		(172)	(580)	1,686
(Gain) loss on sales of businesses and assets	(150,310)			(150,310)
Income (loss) from continuing operations before interest and taxes	175,866		28,083	(102,972)	66,452
Interest expense	(19,488)		(12,632)	(59,728)	(39,002)
Interest income			(14)	(8)	(55)
Income (loss) from continuing operations before taxes	195,354		40,729	(43,236)	105,509
Taxes (benefit) on income (loss) from continuing operations	17,739		12,195	34,932	36,784
Equity in net income of consolidated subsidiaries	21,946		38,641	100,706	150,761
Income (loss) from continuing operations	199,561		67,175	22,538	219,486
Operating income (loss) from discontinued operations	258		1,089	(9,171)	40,678
Taxes (benefit) on income (loss) from discontinued operations	2,649		940	(935)	6,523
Income (loss) from discontinued operations	(2,391)		149	(8,236)	34,155
Net income	197,170		67,324	14,302	253,641
Net income (loss)	197,170		67,324	14,302	253,641
Other comprehensive income attributable to common shareholders	50,393		(47,078)	7,136	(20,172)
Comprehensive income (loss) attributable to common shareholders	247,563		20,246	21,438	233,469
Non-Guarantor Subsidiaries [Member]
Net revenues	196,675		196,399	606,381	585,860
Cost of goods sold	115,381		111,184	349,003	333,309
Gross profit	81,294		85,215	257,378	252,551
Selling, general and administrative expenses	42,030		38,235	109,861	110,918
Research and development expenses	1,576		1,735	4,912	5,788
Goodwill impairment				349
Restructuring and other impairment charges	18		(1)	664	1,901
(Gain) loss on sales of businesses and assets				(332)
Income (loss) from continuing operations before interest and taxes	37,670		45,246	141,924	133,944
Interest expense	1,876		196	5,466	413
Interest income	(233)		(171)	(956)	(374)
Income (loss) from continuing operations before taxes	36,027		45,221	137,414	133,905
Taxes (benefit) on income (loss) from continuing operations	6,811		13,548	21,306	37,621
Income (loss) from continuing operations	29,216		31,673	116,108	96,284
Operating income (loss) from discontinued operations			14,605	2,400	87,451
Taxes (benefit) on income (loss) from discontinued operations	(266)		2,992	(95)	15,867
Income (loss) from discontinued operations	266		11,613	2,495	71,584
Net income	29,482		43,286	118,603	167,868
Less: Income from continuing operations attributable to noncontrolling interests	188		289	701	770
Income from discontinued operations attributable to noncontrolling interest			125		443
Net income (loss)	29,294		42,872	117,902	166,655
Other comprehensive income attributable to common shareholders	41,277		(48,503)	6,510	(19,592)
Comprehensive income (loss) attributable to common shareholders	70,571		(5,631)	124,412	147,063
Eliminations [Member]
Net revenues	(60,776)		(66,952)	(180,131)	(184,990)
Cost of goods sold	(58,734)		(64,818)	(175,896)	(180,311)
Gross profit	(2,042)		(2,134)	(4,235)	(4,679)
Selling, general and administrative expenses	229		293	539	887
(Gain) loss on sales of businesses and assets	150,309			266,503
Income (loss) from continuing operations before interest and taxes	(152,580)		(2,427)	(271,277)	(5,566)
Income (loss) from continuing operations before taxes	(152,580)		(2,427)	(271,277)	(5,566)
Taxes (benefit) on income (loss) from continuing operations	(689)		(906)	(1,592)	(1,938)
Equity in net income of consolidated subsidiaries	(74,573)		(108,675)	137,481	(416,668)
Income (loss) from continuing operations	(226,464)		(110,196)	(132,204)	(420,296)
Net income	(226,464)		(110,196)	(132,204)	(420,296)
Net income (loss)	(226,464)		(110,196)	(132,204)	(420,296)
Other comprehensive income attributable to common shareholders	(91,670)		95,581	(13,646)	39,764
Comprehensive income (loss) attributable to common shareholders	$ (318,134)		$ (14,615)	$ (145,850)	$ (380,532)