Revenue Recognition Effect of Adopting ASC 606 (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended				9 Months Ended
	Sep. 29, 2018		Sep. 30, 2017		Sep. 29, 2018	Sep. 30, 2017	Dec. 30, 2017
Effect of Adopting ASC 606 [Line Items]
Accounts Receivable, Net, Current	$ 410,150				$ 410,150		$ 328,421
Inventories, net	512,824				512,824		424,639
Prepaid expenses and other	50,142				50,142		55,427
Long-term deferred tax assets	39,483				39,483		44,565
Accounts payable	197,750				197,750		146,333
Accrued expenses	373,297				373,297		322,171
Deferred Tax Liabilities, Net, Noncurrent	110,984				110,984		87,815
Retained earnings	1,914,394				1,914,394		1,697,618
Net sales	713,331	[1]	$ 593,043	[1]	1,966,259	$ 1,702,683
Cost of sales	452,171		364,524		1,242,707	1,030,106
Provision for income taxes	25,114		38,104		72,971	99,372
Net earnings	$ 72,905		$ 74,671		$ 222,313	$ 222,942
Earnings Per Share, Basic	$ 1.31		$ 1.31		$ 4.00	$ 3.91
Earnings Per Share, Diluted	$ 1.31		$ 1.31		$ 4.00	$ 3.91
Accounting Standards Update 2014-09 [Member]
Effect of Adopting ASC 606 [Line Items]
Accounts Receivable, Net, Current							(122)
Inventories, net							14,993
Prepaid expenses and other							(4,018)
Long-term deferred tax assets							1,319
Accrued expenses							16,557
Retained earnings							(4,405)
Calculated under Revenue Guidance in Effect before Topic 606 [Member]
Effect of Adopting ASC 606 [Line Items]
Inventories, net	$ 507,677				$ 507,677
Prepaid expenses and other	51,895				51,895
Accrued expenses	377,718				377,718
Deferred Tax Liabilities, Net, Noncurrent	110,768				110,768
Retained earnings	1,913,583				1,913,583
Net sales	710,755				1,949,110
Cost of sales	450,440				1,230,578
Provision for income taxes	24,857				71,649
Net earnings	$ 72,317				$ 218,615
Earnings Per Share, Basic	$ 1.30				$ 3.93
Earnings Per Share, Diluted	$ 1.30				$ 3.93
Difference between Revenue Guidance in Effect before and after Topic 606 [Member]
Effect of Adopting ASC 606 [Line Items]
Inventories, net	$ 5,147				$ 5,147
Prepaid expenses and other	(1,753)				(1,753)
Accrued expenses	(4,421)				(4,421)
Deferred Tax Liabilities, Net, Noncurrent	216				216
Retained earnings	811				811
Net sales	2,576				17,149
Cost of sales	1,731				12,129
Provision for income taxes	257				1,322
Net earnings	$ 588				$ 3,698
BalanceUponAdoption [Member] | Accounting Standards Update 2014-09 [Member]
Effect of Adopting ASC 606 [Line Items]
Accounts Receivable, Net, Current							328,299
Inventories, net							439,632
Prepaid expenses and other							51,409
Long-term deferred tax assets							45,884
Accrued expenses							338,728
Retained earnings							$ 1,693,213

[1] Non-operating expenses are not allocated to the operating segments. Non-operating expenses consist of interest expense and deferred financing amortization, foreign exchange gains and losses and other income and expense items outside of income from operations.