Consolidated Statements of Cash Flows - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 25, 2020	Dec. 27, 2019
Cash flows from operating activities:
Net income (loss)	$ 126.4	$ 80.4	$ (7.7)
Adjustments to reconcile net income (loss) to net cash provided by operating activities (excluding assets acquired, liabilities assumed and noncontrolling interests at acquisition):
Depreciation and amortization	34.1	25.0	21.5
Amortization of intangible assets	33.4	19.8	20.1
Stock-based compensation	15.8	12.7	12.1
Amortization of debt issuance costs	3.4	1.9	1.8
Loss (gain) on the disposal of assets and business	0.2	(1.4)	2.0
Gain from insurance proceeds	(7.3)	(1.0)
Deferred income taxes	(3.2)	0.4	(3.6)
Change in the fair value of financial instruments	12.4	7.7	2.8
Changes in assets and liabilities, net of effects of acquisitions:
Accounts receivable	(53.0)	(32.7)	(4.5)
Inventories	(125.1)	(8.0)	22.3
Prepaid expenses and other current assets	(4.2)	1.2	3.7
Other non-current assets	(0.8)	(0.1)
Accounts payable	170.6	(12.6)	31.0
Accrued compensation and related benefits	1.8	9.7	9.0
Income taxes payable	7.7	2.8	(2.9)
Operating lease assets and liabilities	(1.1)	(1.1)	7.1
Other liabilities	0.5	(7.4)	6.3
Net cash provided by operating activities	211.6	97.3	121.0
Cash flows from investing activities:
Purchases of property, plant and equipment	(59.3)	(36.4)	(26.3)
Proceeds from sale of equipment, including insurance proceeds	7.7	6.6	7.0
Settlement of forward contracts in conjunction with acquisition	(10.4)
Acquisition of businesses, net of cash acquired	(342.8)		(29.9)
Net cash used in investing activities	(404.8)	(29.8)	(49.2)
Cash flows from financing activities:
Proceeds from bank borrowings	415.2	76.7	41.8
Proceeds from issuance of common stock	193.6	0.6	0.3
Principal payments on bank borrowings and finance leases	(131.8)	(105.5)	(93.0)
Payment of contingent earn-out		(1.4)
Payments of debt issuance costs	(8.9)
Payments of dividends to a joint venture shareholder			(0.6)
Employees’ taxes paid upon vesting of restricted stock units	(7.3)	(1.5)	(1.9)
Net cash provided by (used in) financing activities	460.8	(31.1)	(53.4)
Effect of exchange rate changes on cash and cash equivalents	(1.4)	1.4
Net increase in cash and cash equivalents	266.2	37.8	18.4
Cash and cash equivalents at beginning of period	200.3	162.5	144.1
Cash and cash equivalents at end of period	466.5	200.3	162.5
Supplemental cash flow information:
Income taxes paid, net of income tax refunds	23.1	16.4	14.5
Interest paid	19.9	15.6	23.6
Non-cash investing and financing activities:
Property, plant and equipment purchased included in accounts payable and other liabilities	14.8	$ 3.2	5.0
Reclassification of stock purchase commitment to noncontrolling interest	$ 16.5
Fair value of earn-out payment related to business acquisitions			$ 1.4