Fair Value Measurements (Narrative) (Details) € in Millions	6 Months Ended
	Jul. 04, 2021 USD ($)	Jul. 05, 2020 USD ($)	Jul. 04, 2021 EUR (€)	Apr. 04, 2021 USD ($)	Mar. 08, 2021 USD ($)	Jan. 03, 2021 USD ($)	Jan. 03, 2021 EUR (€)	Apr. 05, 2020 USD ($)	Dec. 29, 2019 USD ($)
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability Value	$ 3,334,000	$ 13,726,000		$ 3,124,000		$ 2,953,000		$ 22,777,000	$ 35,481,000
Unamortized Debt Issuance Expense	19,459,000					12,540,000
Debt Instrument, Unamortized Discount	(5,412,000)					(5,765,000)
Payments for acquisition related contingent consideration	0	$ (5,200,000)
2.55 Percent Senior Unsecured Notes due in 2031 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Unamortized Debt Issuance Expense	3,563,000
Unsecured senior notes, face value					$ 400,000,000.0
Debt Instrument, Unamortized Discount	(136,000)				(100,000)
3.625 Percent Senior Unsecured Notes due in 2051 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Unamortized Debt Issuance Expense	4,545,000
Unsecured senior notes, face value					400,000,000.0
Debt Instrument, Unamortized Discount	(4,000)				$ (4,000)
Line of Credit, Maturing September 17, 2024 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Revolving credit facility outstanding balance	125,000,000					158,595,000
Unamortized Debt Issuance Expense	2,264,000					2,621,000
Long-term Debt	122,736,000					155,974,000
Debt Instrument, Unamortized Discount	0					0
1.875 Percent Ten Year Senior Unsecured Notes [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Unamortized Debt Issuance Expense	2,531,000					2,782,000
Debt Instrument, Unamortized Discount	(2,904,000)					(3,253,000)
0.6 Percent Senior Unsecured Notes due in April 2021 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Unamortized Debt Issuance Expense						229,000
Debt Instrument, Unamortized Discount						(16,000)
3.3 Percent Ten Year Senior Unsecured Notes due in Sept 2029 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Unamortized Debt Issuance Expense	6,556,000					6,908,000
Debt Instrument, Unamortized Discount	(2,368,000)					(2,496,000)
Senior Unsecured Notes [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Unsecured senior notes, fair value	2,411,600,000					1,984,300,000
Other Debt Facilities, excluding the senior revolving credit facility [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term Debt, Percentage Bearing Fixed Interest, Amount | €			€ 10.7
DNA Labs & Biosense [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Business Combination, Contingent Consideration Arrangements, Range of Outcomes, Value, High	$ 7,200,000
Business Combination, Contingent Consideration Arrangements, Description	Contingent consideration is measured at fair value at the acquisition date, based on the probability that revenue thresholds or product development milestones will be achieved during the earnout period, with changes in the fair value after the acquisition date affecting earnings to the extent it is to be settled in cash.
Business Combination, Contingent Consideration Arrangements, Maximum Period	1 year 6 months
Business Combination, Contingent Consideration Arrangements, Weighted Average Period	9 months 18 days
Significant Other Observable Inputs (Level 2) [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term Debt	$ 2,348,523,000					1,609,701,000
Significant Other Observable Inputs (Level 2) [Member] | 2.55 Percent Senior Unsecured Notes due in 2031 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term Debt	396,301,000
Significant Other Observable Inputs (Level 2) [Member] | 3.625 Percent Senior Unsecured Notes due in 2051 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term Debt	395,451,000
Significant Other Observable Inputs (Level 2) [Member] | 1.875 Percent Ten Year Senior Unsecured Notes [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term Debt	586,865,000					604,715,000
Significant Other Observable Inputs (Level 2) [Member] | 3.3 Percent Ten Year Senior Unsecured Notes due in Sept 2029 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term Debt	841,076,000					840,596,000
Significant Other Observable Inputs (Level 2) [Member] | Senior Unsecured Notes [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term Debt	$ 2,219,700,000					$ 1,811,500,000
Significant Other Observable Inputs (Level 2) [Member] | Other Debt Facilities, including the senior revolving credit facility [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Other Long-term Debt | €			€ 133.5				€ 179.1