Changes in Accounting Policies (Details) - USD ($) $ in Thousands	3 Months Ended				6 Months Ended
	Jul. 05, 2020	Apr. 05, 2020	Jun. 30, 2019	Mar. 31, 2019	Jul. 05, 2020	Jun. 30, 2019	Dec. 29, 2019	Dec. 30, 2018
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Cost of Goods and Services Sold	$ (364,374)		$ (374,724)		$ (708,747)	$ (715,655)
Selling, general and administrative expenses	221,026		201,553		429,595	400,410
Research and development expenses	49,521		48,344		98,435	96,324
Restructuring and other costs, net	1,158		6,161		7,016	13,800
Operating income (loss) from continuing operations	175,639		91,735		220,321	145,065
Nonoperating Income (Expense)	10,812		19,908		20,805	36,473
Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Noncontrolling Interest	164,827		71,827		199,516	108,592
Provision for income taxes	27,614		2,686		28,588	3,998
Income (Loss) from Continuing Operations, Net of Tax, Attributable to Parent	137,213		69,141		170,928	104,594
Loss on disposition of discontinued operations before income taxes	0		0		0	0
Cash and cash equivalents	218,536		150,016		218,536	150,016	$ 191,877
Accounts receivable, net	(708,799)				(708,799)		(725,184)
Inventories	477,707				477,707		356,937
Other current assets	(126,371)				(126,371)		(100,381)
Property, Plant and Equipment, Net	322,789				322,789		318,223
Intangible assets, net	1,188,464				1,188,464		1,283,286
Goodwill	3,107,373				3,107,373		3,111,227
Other assets, net	291,555				291,555		284,173
Assets	(6,636,816)				(6,636,816)		(6,538,564)
Current portion of long-term debt	346,342				346,342		9,974
Accounts payable	255,137				255,137		235,855
Accrued expenses and other current liabilities	9,613				9,613		11,559
Accrued expenses and other current liabilities	550,067				550,067		503,332
Current liabilities of discontinued operations	2,097				2,097		2,112
Long-term debt	1,624,996				1,624,996		2,064,041
Long-term liabilities	703,208				703,208		751,468
Liabilities	3,669,353				3,669,353		3,724,740
Preferred Stock, Value, Issued	0				0		0
Common Stock, Value, Issued	111,501				111,501		111,140
Capital in excess of par value	106,744				106,744		90,357
Retained earnings	2,965,890				2,965,890		2,811,973
Accumulated other comprehensive loss	(216,672)				(216,672)		(199,646)
Stockholders' Equity Attributable to Parent	2,967,463	$ 2,759,746	2,706,867	$ 2,638,472	2,967,463	2,706,867	2,813,824	$ 2,584,955
Liabilities and Equity	(6,636,816)				(6,636,816)		$ (6,538,564)
Discontinued Operation, Tax Effect of Discontinued Operation	51		54		101	95
Income (Loss) from Discontinued Operations, Net of Tax, Including Portion Attributable to Noncontrolling Interest	(51)		(54)		(101)	(95)
Net income	$ 137,162	$ 33,665	$ 69,087	$ 35,412	$ 170,827	$ 104,499