Acquisitions and Purchase Accounting Estimated Fair Values of Assets Acquired and Liabilities Assumed - 2020 Acquisitions (Details) - USD ($)			3 Months Ended		9 Months Ended
	Sep. 24, 2021	Jul. 12, 2021	Oct. 02, 2021	Sep. 26, 2020	Oct. 02, 2021	Sep. 26, 2020	Jan. 02, 2021
Business Acquisition [Line Items]
Goodwill			$ 2,106,182,000		$ 2,106,182,000		$ 1,934,261,000
Merger termination fee			(110,000,000)	$ 0	110,000,000	$ 0
2020 Acquisitions
Business Acquisition [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Cash and Equivalents			14,647,000		14,647,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets			30,279,000		30,279,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Property, Plant, and Equipment			2,773,000		2,773,000
Goodwill			59,075,000		59,075,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill			58,826,000		58,826,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Other Noncurrent Assets			6,173,000		6,173,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities			(41,441,000)		(41,441,000)
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Deferred Tax Liabilities, Net			264,000		264,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Noncurrent Liabilities, Other			(21,111,000)		(21,111,000)
Business Combination Recognized Identifiable Assets Acquired Goodwill And Liabilities Assumed Initial Consideration, Net			109,485,000		109,485,000
Business Combination, Deferred Payments, Liability			8,198,000		8,198,000
Business Combination, Contingent Consideration, Liability			15,308,000		15,308,000
Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Net			132,991,000		132,991,000
Business Acquisition, Goodwill, Expected Tax Deductible Amount			24,400,000		24,400,000
Business Combination, Intangible Assets, Other than Goodwill, Expected Tax Deductible Amount			58,500,000		58,500,000
2020 Acquisitions | Initial accounting
Business Acquisition [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Cash and Equivalents			14,647,000		14,647,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets			43,670,000		43,670,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Property, Plant, and Equipment			3,014,000		3,014,000
Goodwill			55,335,000		55,335,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill			63,201,000		63,201,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Other Noncurrent Assets			6,121,000		6,121,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities			(54,478,000)		(54,478,000)
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Deferred Tax Liabilities, Net			(123,000)		(123,000)
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Noncurrent Liabilities, Other			(21,902,000)		(21,902,000)
Business Combination Recognized Identifiable Assets Acquired Goodwill And Liabilities Assumed Initial Consideration, Net			109,485,000		109,485,000
Business Combination, Deferred Payments, Liability			8,666,000		8,666,000
Business Combination, Contingent Consideration, Liability			16,144,000		16,144,000
Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Net			134,295,000		134,295,000
2020 Acquisitions | Measurement period adjustment
Business Acquisition [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Cash and Equivalents			0		0
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets			(13,391,000)		(13,391,000)
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Property, Plant, and Equipment			(241,000)		(241,000)
Goodwill			3,740,000		3,740,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill			(4,375,000)		(4,375,000)
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Other Noncurrent Assets			52,000		52,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities			13,037,000		13,037,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Deferred Tax Liabilities, Net			387,000		387,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Noncurrent Liabilities, Other			791,000		791,000
Business Combination Recognized Identifiable Assets Acquired Goodwill And Liabilities Assumed Initial Consideration, Net			0		0
Business Combination, Deferred Payments, Liability			(468,000)		(468,000)
Business Combination, Contingent Consideration, Liability			(836,000)		(836,000)
Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Net			(1,304,000)		(1,304,000)
Novy
Business Acquisition [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Deferred Tax Liabilities, Net		$ 33,900,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Noncurrent Liabilities, Other		(1,930,000)
Novy | Initial accounting
Business Acquisition [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Cash and Equivalents		16,152,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets		23,762,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Property, Plant, and Equipment		17,058,000
Goodwill		142,741,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill		126,557,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Other Noncurrent Assets		26,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities		(23,440,000)
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Deferred Tax Liabilities, Net		(33,918,000)
Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Net		267,008,000
Imperial
Business Acquisition [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Cash and Equivalents	$ 347,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets	8,070,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Property, Plant, and Equipment	19,120,000
Goodwill	42,570,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill	65,230,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Other Noncurrent Assets	6,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities	(7,701,000)
Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Net	127,642,000
Welbilt
Business Acquisition [Line Items]
Merger termination fee					110,000,000
Business Acquisition, Transaction Costs			19,700,000		19,700,000
Tradenames And Trademarks | 2020 Acquisitions
Business Acquisition [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill			15,700,000		15,700,000
Tradenames And Trademarks | Novy
Business Acquisition [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill		89,500,000
Tradenames And Trademarks | Imperial
Business Acquisition [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill	35,500,000
Customer Relationships | 2020 Acquisitions
Business Acquisition [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill			10,600,000		$ 10,600,000
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life					6 years
Customer Relationships | Novy
Business Acquisition [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill		$ 33,900,000
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life		7 years
Customer Relationships | Imperial
Business Acquisition [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill	$ 28,300,000
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life	7 years
Developed Technology Rights | 2020 Acquisitions
Business Acquisition [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill			26,200,000		$ 26,200,000
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life					6 years
Developed Technology Rights | Novy
Business Acquisition [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill		$ 2,300,000
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life		7 years
Developed Technology Rights | Imperial
Business Acquisition [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill	$ 900,000
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life	7 years
Backlog | 2020 Acquisitions
Business Acquisition [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill			6,300,000		$ 6,300,000
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life					3 months
Backlog | Novy
Business Acquisition [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill		$ 900,000
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life		3 months
Backlog | Imperial
Business Acquisition [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill			600,000		$ 600,000
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life	3 months
Maximum | Customer Relationships | 2020 Acquisitions
Business Acquisition [Line Items]
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life					9 years
Maximum | Developed Technology Rights | 2020 Acquisitions
Business Acquisition [Line Items]
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life					12 years
Maximum | Backlog | 2020 Acquisitions
Business Acquisition [Line Items]
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life					9 months
Commercial Foodservice Equipment Group
Business Acquisition [Line Items]
Goodwill			1,266,296,000		$ 1,266,296,000		$ 1,228,436,000
Commercial Foodservice Equipment Group | 2020 Acquisitions
Business Acquisition [Line Items]
Goodwill			59,100,000		59,100,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill			$ 58,800,000		$ 58,800,000
Commercial Foodservice Equipment Group | Imperial
Business Acquisition [Line Items]
Goodwill	$ 42,600,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill	$ 65,200,000