Business Combinations (Narrative) (Details) | 3 Months Ended | 12 Months Ended | | |
Apr. 03, 2022USD ($) | Apr. 04, 2021USD ($)$ / shares | Jan. 02, 2022USD ($)employeesshares | Sep. 17, 2021$ / shares | Jan. 03, 2021USD ($) |
Business Acquisition [Line Items] | | | | | |
Number of Years in Measurement Period from Acquisition Date to Change Underlying Assumptions | 1 year | | | | |
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability Value | $ 49,828,000 | $ 3,124,000 | $ 57,996,000 | | $ 2,953,000 |
Total transaction costs | (20,500,000) | (4,400,000) | | | |
Goodwill | 7,367,284,000 | | 7,416,584,000 | | |
Business Combination, Contingent Consideration, Liability, Current | 1,100,000 | | 1,300,000 | | |
Business Combination, Contingent Consideration, Liability, Noncurrent | 48,700,000 | | 56,700,000 | | |
Interest Expense | 28,388,000 | 14,126,000 | | | |
Business Combination, Contingent Consideration, Liability | 49,800,000 | | $ 58,000,000 | | |
Business Combination, Acquisition Related Costs | $ 20,500,000 | 4,400,000 | | | |
Fiscal Year 2022 Acquisitions [Member] | | | | | |
Business Acquisition [Line Items] | | | | | |
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life | 5 years | | | | |
Oxford Immunotec [Member] | | | | | |
Business Acquisition [Line Items] | | | | | |
Entity Number of Employees | employees | | | 275 | | |
Foreign Currency Transaction Gain (Loss), before Tax | | (5,400,000) | | | |
Fiscal Year 2021 Acquisitions (Excluding BioLegend) [Member] | | | | | |
Business Acquisition [Line Items] | | | | | |
Business Acquisition, Cost Of Acquired Entity, Working Capital Adjustments | | | $ (183,000) | | |
Business Combination, Consideration Transferred | | | 981,698,000 | | |
Cash Acquired | | | (195,010,000) | | |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets | | | 72,104,000 | | |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Property, Plant, and Equipment | | | 26,507,000 | | |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Other Noncurrent Assets | | | 15,564,000 | | |
Cash paid to the shareholders | | | 1,128,584,000 | | |
Business Combination, Consideration Transferred, Liabilities Incurred | | | 2,910,000 | | |
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life | 12 years 3 months 18 days | | | | |
Business Acquisition, Cost of Acquired Entity, Liabilities Incurred, Contingent Consideration at Fair Value | $ 45,031,000 | | | | |
Goodwill | 550,023,000 | | | | |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Noncurrent Liabilities, Long-term Debt | 61,960,000 | | | | |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Net | | | 981,698,000 | | |
Business Combination, Consideration Transferred, Equity Interests Issued and Issuable | | | $ 0 | | |
Nexcelom Bioscience [Member] | | | | | |
Business Acquisition [Line Items] | | | | | |
Entity Number of Employees | employees | | | 130 | | |
BioLegend [Member] | | | | | |
Business Acquisition [Line Items] | | | | | |
Business Acquisition, Pro Forma Revenue | | 1,385,114,000 | | | |
Business Combination, Pro Forma Information, Revenue of Acquiree since Acquisition Date, Actual | | | $ 91,700,000 | | |
Business Combination, Pro Forma Information, Earnings or Loss of Acquiree since Acquisition Date, Actual | | | 25,800,000 | | |
Business Acquisition, Cost Of Acquired Entity, Working Capital Adjustments | | | 0 | | |
Business Combination, Consideration Transferred | | | 5,688,964,000 | | |
Cash Acquired | | | (292,377,000) | | |
Cash Acquired from Acquisition | | | (292,400,000) | | |
Business Acquisition, Cost of Acquired Entity, Consideration Paid in Cash | | | 3,300,000,000 | | |
Business Acquisition, Cost of Acquired Entity, Consideration Paid in Common Stock | | | 2,600,000,000 | | |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets | | | 184,704,000 | | |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Property, Plant, and Equipment | | | 147,200,000 | | |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Other Noncurrent Assets | | | $ 9,330,000 | | |
Entity Number of Employees | employees | | | 700 | | |
Cash paid to the shareholders | | | $ 3,336,115,000 | | |
Business Combination, Consideration Transferred, Liabilities Incurred | | | $ 6,857,000 | | |
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life | | | 16 years 3 months 18 days | | |
Business Acquisition, Cost of Acquired Entity, Liabilities Incurred, Contingent Consideration at Fair Value | | | $ 0 | | |
Goodwill | | | 3,510,710,000 | | |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Noncurrent Liabilities, Long-term Debt | | | 38,239,000 | | |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Net | | | $ 5,688,964,000 | | |
Business Acquisition, Pro Forma Income (Loss) from Continuing Operations, Net of Tax | | $ 370,624,000 | | | |
Business Acquisition, Pro Forma Earnings Per Share, Basic | $ / shares | | $ 2,940 | | | |
Business Acquisition, Pro Forma Earnings Per Share, Diluted | $ / shares | | $ 2,930 | | | |
Business Acquisition, Share Price | $ / shares | | | | $ 187.56 | |
Stock Issued During Period, Shares, Acquisitions | shares | | | 14,066,799 | | |
Business Combination, Consideration Transferred, Equity Interests Issued and Issuable | | | $ 2,638,369,000 | | |
Acquisition-related stock compensation expense | 7,500,000 | | | | |
Cash Acquired from Acquisition | | | 292,400,000 | | |
Shandong Meizheng [Member] | | | | | |
Business Acquisition [Line Items] | | | | | |
Compensation Expense, Excluding Cost of Good and Service Sold | | $ 5,400,000 | | | |
Diagnostics [Member] | | | | | |
Business Acquisition [Line Items] | | | | | |
Goodwill | 1,960,267,000 | | 1,970,350,000 | | |
Discovery & Analytical Solutions [Member] | | | | | |
Business Acquisition [Line Items] | | | | | |
Goodwill | 5,407,017,000 | | 5,446,234,000 | | |
Core Technology [Member] | Fiscal Year 2021 Acquisitions (Excluding BioLegend) [Member] | | | | | |
Business Acquisition [Line Items] | | | | | |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles | 290,089,000 | | | | |
Core Technology [Member] | BioLegend [Member] | | | | | |
Business Acquisition [Line Items] | | | | | |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles | | | 782,400,000 | | |
Customer Relationships [Member] | Fiscal Year 2021 Acquisitions (Excluding BioLegend) [Member] | | | | | |
Business Acquisition [Line Items] | | | | | |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles | 141,670,000 | | | | |
Customer Relationships [Member] | BioLegend [Member] | | | | | |
Business Acquisition [Line Items] | | | | | |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles | | | 1,714,800,000 | | |
Trade Names [Member] | Fiscal Year 2021 Acquisitions (Excluding BioLegend) [Member] | | | | | |
Business Acquisition [Line Items] | | | | | |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles | 39,626,000 | | | | |
Trade Names [Member] | BioLegend [Member] | | | | | |
Business Acquisition [Line Items] | | | | | |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles | | | 38,000,000 | | |
United States of America, Dollars | Fiscal Year 2022 Acquisitions [Member] | | | | | |
Business Acquisition [Line Items] | | | | | |
Business Acquisition, Cost of Acquired Entity, Cash Paid Including Working Capital And Other Adjustments | 13,500,000 | | | | |
United States of America, Dollars | Oxford Immunotec [Member] | | | | | |
Business Acquisition [Line Items] | | | | | |
Business Acquisition, Cost of Acquired Entity, Cash Paid Including Working Capital And Other Adjustments | | | 590,900,000 | | |
United States of America, Dollars | Fiscal Year 2021 Acquisitions (Excluding BioLegend) [Member] | | | | | |
Business Acquisition [Line Items] | | | | | |
Business Acquisition, Cost of Acquired Entity, Cash Paid Including Working Capital And Other Adjustments | | | 1,200,000,000 | | |
United States of America, Dollars | Nexcelom Bioscience [Member] | | | | | |
Business Acquisition [Line Items] | | | | | |
Business Acquisition, Cost of Acquired Entity, Cash Paid Including Working Capital And Other Adjustments | | | 267,300,000 | | |
United States of America, Dollars | BioLegend [Member] | | | | | |
Business Acquisition [Line Items] | | | | | |
Business Acquisition, Cost of Acquired Entity, Cash Paid Including Working Capital And Other Adjustments | | | 5,700,000,000 | | |
United States of America, Dollars | Fiscal Year 2021 Other Acquisitions [Member] | | | | | |
Business Acquisition [Line Items] | | | | | |
Business Acquisition, Cost of Acquired Entity, Cash Paid Including Working Capital And Other Adjustments | $ 318,600,000 | | | | |
Amortization of intangible assets recognized in acquisition [Member] | BioLegend [Member] | | | | | |
Business Acquisition [Line Items] | | | | | |
Business Combination, Pro Forma Information, Earnings or Loss of Acquiree since Acquisition Date, Actual | | | 47,000,000 | | |
Amortization of fair value adjustment to acquired inventory [Member] | BioLegend [Member] | | | | | |
Business Acquisition [Line Items] | | | | | |
Business Combination, Pro Forma Information, Earnings or Loss of Acquiree since Acquisition Date, Actual | | | $ 16,600,000 | | |