Acquisitions and Purchase Accounting Estimated Fair Values of Assets Acquired and Liabilities Assumed - 2019 Acquisitions (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 28, 2020	Dec. 28, 2019
Business Acquisition [Line Items]
Goodwill	$ 1,835,787	$ 1,849,747
Commercial Foodservice Equipment Group
Business Acquisition [Line Items]
Goodwill	1,156,923	1,153,552
Food Processing Group
Business Acquisition [Line Items]
Goodwill	255,569	257,679
Residential Kitchen
Business Acquisition [Line Items]
Goodwill	423,295	$ 438,516
2019 Acquisitions
Business Acquisition [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Cash and Equivalents	2,673
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets	22,447
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Property, Plant, and Equipment	8,754
Goodwill	96,538
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill	64,408
Business Combination Recognized Identifiable Assets Acquired and Liabilities Assumed, Deferred Tax Assets	2,716
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Other Noncurrent Assets	991
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities	(20,638)
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Noncurrent Liabilities, Other	(6,699)
Business Combination Recognized Identifiable Assets Acquired Goodwill And Liabilities Assumed Initial Consideration, Net	171,190
Business Combination, Deferred Payments, Liability	2,404
Business Combination, Contingent Consideration, Liability	4,258
Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Net	177,852
Business Combinations, Deferred Tax Assets, Operating Loss Carryforwards	2,900
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Deferred Tax Liabilities	(1,000)
Deferred Tax Assets, Tax Deferred Expense, Other	800
Business Acquisition, Goodwill, Expected Tax Deductible Amount	85,500
Business Combination, Intangible Assets, Other than Goodwill, Expected Tax Deductible Amount	53,800
2019 Acquisitions | Previously Reported
Business Acquisition [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Cash and Equivalents	2,683
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets	21,525
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Property, Plant, and Equipment	8,920
Goodwill	99,838
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill	64,019
Business Combination Recognized Identifiable Assets Acquired and Liabilities Assumed, Deferred Tax Assets	1,288
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Other Noncurrent Assets	137
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities	(20,437)
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Noncurrent Liabilities, Other	(6,170)
Business Combination Recognized Identifiable Assets Acquired Goodwill And Liabilities Assumed Initial Consideration, Net	171,803
Business Combination, Deferred Payments, Liability	2,404
Business Combination, Contingent Consideration, Liability	4,258
Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Net	178,465
2019 Acquisitions | Scenario, Adjustment
Business Acquisition [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Cash and Equivalents	(10)
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets	922
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Property, Plant, and Equipment	(166)
Goodwill	(3,300)
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill	389
Business Combination Recognized Identifiable Assets Acquired and Liabilities Assumed, Deferred Tax Assets	1,428
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Other Noncurrent Assets	854
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities	(201)
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Noncurrent Liabilities, Other	(529)
Business Combination Recognized Identifiable Assets Acquired Goodwill And Liabilities Assumed Initial Consideration, Net	(613)
Business Combination, Deferred Payments, Liability	0
Business Combination, Contingent Consideration, Liability	0
Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Net	(613)
2019 Acquisitions | Commercial Foodservice Equipment Group
Business Acquisition [Line Items]
Goodwill	42,800
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill	35,500
2019 Acquisitions | Food Processing Group
Business Acquisition [Line Items]
Goodwill	43,700
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill	21,300
2019 Acquisitions | Residential Kitchen
Business Acquisition [Line Items]
Goodwill	9,900
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill	7,600
Tradenames And Trademarks | 2019 Acquisitions
Business Acquisition [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill	29,600
Customer Relationships | 2019 Acquisitions
Business Acquisition [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill	$ 22,300
Customer Relationships | 2019 Acquisitions | Minimum
Business Acquisition [Line Items]
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life	2 years
Customer Relationships | 2019 Acquisitions | Maximum
Business Acquisition [Line Items]
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life	10 years
Developed Technology Rights | 2019 Acquisitions
Business Acquisition [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill	$ 11,100
Developed Technology Rights | 2019 Acquisitions | Minimum
Business Acquisition [Line Items]
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life	5 years
Developed Technology Rights | 2019 Acquisitions | Maximum
Business Acquisition [Line Items]
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life	7 years
Backlog | 2019 Acquisitions
Business Acquisition [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill	$ 1,400
Backlog | 2019 Acquisitions | Minimum
Business Acquisition [Line Items]
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life	3 months