Consolidated Statements of Stockholders' Equity - USD ($) $ in Thousands	Total	Common Stock Amount [Member]	Capital In Excess of Par Value [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive Income (Loss) [Member]
Beginning Balance at Jan. 01, 2017	$ 2,153,570	$ 109,617	$ 26,130	$ 2,118,684	$ (100,861)
Net income	292,633	0	0	292,633	0
Other comprehensive income (loss)	54,343				54,343
Dividends	(30,800)			(30,800)
Exercise of employee stock options and related income tax benefits	18,004	578	17,426
Issuance of common stock for employee benefit plans	2,467	37	2,430
Cost of Repurchased Common Shares, Repurchase Plan and Amount for Statutory Tax Withholding Obligations	4,367	79	4,288
Issuance of common stock for long-term incentive program	12,353	208	12,145
Stock compensation	4,985	0	4,985	0	0
Ending Balance at Dec. 31, 2017	2,503,188	110,361	58,828	2,380,517	(46,518)
Net income	237,927	0	0	237,927	0
Other comprehensive income (loss)	(129,963)
Dividends	(31,013)			(31,013)	0
Exercise of employee stock options and related income tax benefits	24,833	709	24,124
Issuance of common stock for employee benefit plans	1,485	21	1,464
Cost of Repurchased Common Shares, Repurchase Plan and Amount for Statutory Tax Withholding Obligations	57,393	717	56,676
Issuance of common stock for long-term incentive program	15,873	223	15,650
Stock compensation	5,382	0	5,382	0	0
Ending Balance at Dec. 30, 2018	2,584,955	110,597	48,772	2,602,067	(176,481)
Other Comprehensive Income (Loss), after Reclassifications, Net of Tax	(123,474)				(123,474)
Net income	227,558			227,558
Other comprehensive income (loss)	(23,165)
Dividends	(30,941)			(30,941)
Exercise of employee stock options and related income tax benefits	19,732	415	19,317
Issuance of common stock for employee benefit plans	2,776	33	2,743
Cost of Repurchased Common Shares, Repurchase Plan and Amount for Statutory Tax Withholding Obligations	6,313	67	6,246
Issuance of common stock for long-term incentive program	19,307	162	19,145
Stock compensation	6,626	0	6,626	0	0
Ending Balance at Dec. 29, 2019	2,813,824	$ 111,140	$ 90,357	$ 2,811,973	(199,646)
Other Comprehensive Income (Loss), after Reclassifications, Net of Tax	$ (23,165)				$ (23,165)