Changes in Accounting Policies (Details) - USD ($) $ in Thousands	3 Months Ended
	Apr. 05, 2020	Mar. 31, 2019	Dec. 29, 2019	Dec. 30, 2018
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Cost of Goods and Services Sold	$ (344,373)	$ (340,931)
Selling, general and administrative expenses	208,569	198,857
Research and development expenses	48,914	47,980
Restructuring and other costs, net	5,858	7,639
Operating income (loss) from continuing operations	44,682	53,330
Nonoperating Income (Expense)	9,993	16,565
Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Noncontrolling Interest	34,689	36,765
Provision for income taxes	974	1,312
Income (Loss) from Continuing Operations, Net of Tax, Attributable to Parent	33,715	35,453
Loss on disposition of discontinued operations before income taxes	0	0
Cash and cash equivalents	195,146	134,252	$ 191,877
Accounts receivable, net	(626,150)		(725,184)
Inventories	393,164		356,937
Other current assets	(127,366)		(100,381)
Property, Plant and Equipment, Net	313,857		318,223
Intangible assets, net	1,200,288		1,283,286
Goodwill	3,051,694		3,111,227
Other assets, net	280,412		284,173
Assets	(6,384,396)		(6,538,564)
Current portion of long-term debt	9,654		9,974
Accounts payable	233,227		235,855
Accrued expenses and other current liabilities	11,298		11,559
Accrued expenses and other current liabilities	473,853		503,332
Current liabilities of discontinued operations	2,112		2,112
Long-term debt	2,010,525		2,064,041
Long-term liabilities	704,154		751,468
Liabilities	3,624,650		3,724,740
Preferred Stock, Value, Issued	0		0
Common Stock, Value, Issued	111,306		111,140
Capital in excess of par value	90,236		90,357
Retained earnings	2,836,531		2,811,973
Accumulated other comprehensive loss	(278,327)		(199,646)
Stockholders' Equity Attributable to Parent	2,759,746	2,638,472	2,813,824	$ 2,584,955
Liabilities and Equity	(6,384,396)		$ (6,538,564)
Discontinued Operation, Tax Effect of Discontinued Operation	50	41
Income (Loss) from Discontinued Operations, Net of Tax, Including Portion Attributable to Noncontrolling Interest	(50)	(41)
Net income	$ 33,665	$ 35,412