Income Taxes (Details 2) (USD $) In Thousands, unless otherwise specified	Jan. 03, 2012	Dec. 31, 2011	Dec. 31, 2010
Deferred tax assets:
Tax credit carryovers		$ 408,444	$ 432,707
Net operating loss carryforwards		989,989	1,338,831
Capital loss carryover		552	147,107
Future deductions for purchased intangible assets		152,507	178,906
Depreciation and amortization		120,764	105,349
Pension and post-retirement benefits		220,747	165,718
Future deductions for reserves and other		155,618	195,840
Total deferred tax assets		2,048,621	2,564,458
Valuation allowance		(1,902,187)	(2,385,677)
Net deferred tax assets		146,434	178,781
Deferred tax liabilities:
Tax deductible goodwill		(17,120)	(36,338)
Purchased intangible assets		(130,219)	(172,186)
Total deferred tax liabilities		(147,339)	(208,524)
Total net deferred tax liabilities	$ (41,705)	$ (905)	$ (29,743)