Accumulated Other Comprehensive Income Accumulated Other Comprehensive Income (Changes In Other Comprehensinve Income) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Apr. 01, 2012	Dec. 31, 2012	Dec. 31, 2011
Accumulated Other Comprehensive Income (Loss), Net of Tax	$ (597,652)	$ (467,952)	$ (607,678)	$ (476,733)
Other Comprehensive Income (Loss), Before Reclassifications, Before Tax	4,017	322
Other Comprehensive Income (Loss), Available-for-sale Securities Adjustment, before Tax, Portion Attributable to Parent	0	0
Other Comprehensive Income (Loss), Amortization, Pension and Other Postretirement Benefit Plans, Net Prior Service Cost Recognized in Net Periodic Benefit Cost, before Tax	(527)	(223)
Other Comprehensive Income (Loss), Reclassification, Pension and Other Postretirement Benefit Plans, Net Gain (Loss) Recognized in Net Periodic Benefit Cost, before Tax	16,790	12,824
Total Reclassifications Out Of Accumulated Other Comprehensive Income, Before Tax	17,219	11,465
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent	10,026	8,781
Reclassifications Out of AOCI, Net Of Tax, To Net Income	10,844	7,228
Foreign Currency Contracts [Member]
Other Comprehensive Income (Loss), Reclassification Adjustment on Derivatives Included in Net Income, before Tax	740	(2,421)
Commodities Contracts [Member]
Other Comprehensive Income (Loss), Reclassification Adjustment on Derivatives Included in Net Income, before Tax	(47)	318
Interest Rate Swaps Unsecured Commercial Paper [Member]
Other Comprehensive Income (Loss), Reclassification Adjustment on Derivatives Included in Net Income, before Tax	263	967
Before Reclassifications [Member]
Other Comprehensive Income (Loss), Tax	(4,835)	1,231
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent	(818)	1,553
After Reclassifications [Member]
Other Comprehensive Income (Loss), Tax	(6,375)	(4,237)
Foreign Currency Translation Adjustments [Member]
Accumulated Other Comprehensive Income (Loss), Net of Tax	40,765	54,596	51,335	49,935
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Gain (Loss), before Reclassification and Tax	(11,472)	5,258
Total Reclassifications Out Of Accumulated Other Comprehensive Income, Before Tax	0	0
Reclassifications Out of AOCI, Net Of Tax, To Net Income	0	0
Foreign Currency Translation Adjustments [Member] | Before Reclassifications [Member]
Other Comprehensive Income (Loss), Tax	902	(597)
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent	(10,570)	4,661
Foreign Currency Translation Adjustments [Member] | After Reclassifications [Member]
Other Comprehensive Income (Loss), Tax	0	0
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent	(10,570)	4,661
Marketable Securities [Member]
Accumulated Other Comprehensive Income (Loss), Net of Tax	433	1,340	677	327
Other Comprehensive Income (Loss), Available-for-sale Securities Adjustment, before Reclassification Adjustments and Tax	(388)	1,609
Other Comprehensive Income (Loss), Available-for-sale Securities Adjustment, before Tax, Portion Attributable to Parent	0	0
Total Reclassifications Out Of Accumulated Other Comprehensive Income, Before Tax	0	0
Reclassifications Out of AOCI, Net Of Tax, To Net Income	0	0
Marketable Securities [Member] | Before Reclassifications [Member]
Other Comprehensive Income (Loss), Tax	144	(596)
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent	(244)	1,013
Marketable Securities [Member] | After Reclassifications [Member]
Other Comprehensive Income (Loss), Tax	0	0
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent	(244)	1,013
Derivative Financial Instruments [Member]
Accumulated Other Comprehensive Income (Loss), Net of Tax	6,764	1,481	(3,837)	6,307
Other Comprehensive Income (Loss), Unrealized Gain (Loss) on Derivatives Arising During Period, before Tax	15,877	(6,545)
Total Reclassifications Out Of Accumulated Other Comprehensive Income, Before Tax	956	(1,136)
Reclassifications Out of AOCI, Net Of Tax, To Net Income	605	(705)
Derivative Financial Instruments [Member] | Foreign Currency Contracts [Member]
Other Comprehensive Income (Loss), Reclassification Adjustment on Derivatives Included in Net Income, before Tax	740	(2,421)
Derivative Financial Instruments [Member] | Commodities Contracts [Member]
Other Comprehensive Income (Loss), Reclassification Adjustment on Derivatives Included in Net Income, before Tax	(47)	318
Derivative Financial Instruments [Member] | Interest Rate Swaps Unsecured Commercial Paper [Member]
Other Comprehensive Income (Loss), Reclassification Adjustment on Derivatives Included in Net Income, before Tax	263	967
Derivative Financial Instruments [Member] | Before Reclassifications [Member]
Other Comprehensive Income (Loss), Tax	(5,881)	2,424
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent	9,996	(4,121)
Derivative Financial Instruments [Member] | After Reclassifications [Member]
Other Comprehensive Income (Loss), Tax	(351)	431
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent	10,601	(4,826)
Pension and Postretirement Benefit Plans [Member]
Accumulated Other Comprehensive Income (Loss), Net of Tax	(645,614)	(525,369)	(655,853)	(533,302)
Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Adjustment, before Reclassification Adjustments and Tax	0	0
Other Comprehensive Income (Loss), Amortization, Pension and Other Postretirement Benefit Plans, Net Prior Service Cost Recognized in Net Periodic Benefit Cost, before Tax	(527)	(223)
Other Comprehensive Income (Loss), Reclassification, Pension and Other Postretirement Benefit Plans, Net Gain (Loss) Recognized in Net Periodic Benefit Cost, before Tax	16,790	12,824
Total Reclassifications Out Of Accumulated Other Comprehensive Income, Before Tax	16,263	12,601
Reclassifications Out of AOCI, Net Of Tax, To Net Income	10,239	7,933
Pension and Postretirement Benefit Plans [Member] | Before Reclassifications [Member]
Other Comprehensive Income (Loss), Tax	0	0
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent	0	0
Pension and Postretirement Benefit Plans [Member] | After Reclassifications [Member]
Other Comprehensive Income (Loss), Tax	(6,024)	(4,668)
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent	$ 10,239	$ 7,933