CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Millions	9 Months Ended
	Sep. 25, 2022	Sep. 26, 2021
Operating activities:
Net income (loss)	$ (28.3)	$ 0.9
Income (loss) from discontinued operations	0.7	(1.1)
Income (loss) from continuing operations	(29.0)	2.0
Adjustments to reconcile income (loss) from continuing operations to net cash provided by (used in) operating activities from continuing operations:
Depreciation and amortization	22.8	19.4
Deferred income taxes	0.3	(0.7)
Amortization of lease right-of-use assets	7.8	6.7
Stock-based compensation	19.9	19.2
Amortization of deferred financing costs	0.6	0.7
Loss on extinguishment of debt	13.0	0.0
Recovery of doubtful accounts	0.0	(0.2)
Litigation related charges	5.5	0.0
Changes in assets and liabilities, net of acquisitions:
Accounts receivable	17.0	10.1
Unbilled receivables	(18.2)	(12.2)
Inventoried costs	(28.0)	(6.8)
Prepaid expenses and other assets	(17.4)	(5.1)
Operating lease liabilities	(7.7)	(6.7)
Accounts payable	1.0	(10.5)
Accrued expenses	1.1	(6.0)
Accrued compensation	3.0	3.3
Accrued interest	(1.2)	4.8
Billings in excess of costs and earnings on uncompleted contracts	(10.6)	23.8
Income tax receivable and payable	(8.3)	(2.5)
Other liabilities	(3.9)	(4.7)
Net cash provided by (used in) operating activities from continuing operations	(32.3)	34.6
Investing activities:
Cash paid for acquisitions, net of cash acquired	(132.2)	(6.2)
Proceeds from insurance	0.0	4.5
Proceeds from sale of assets	0.1	0.0
Capital expenditures	(34.8)	(33.4)
Net cash used in investing activities from continuing operations	(166.9)	(35.1)
Financing activities:
Proceeds from the issuance of long-term debt	200.0	0.0
Debt issuance costs	(3.2)	0.0
Credit agreement borrowings	100.0	0.0
Repayment of debt	(311.0)	(5.1)
Payments under finance leases	(1.0)	(0.7)
Payments of employee taxes withheld from share-based awards	(12.3)	(9.1)
Proceeds from shares issued under equity plans	6.1	5.9
Net cash used in financing activities from continuing operations	(21.4)	(9.0)
Net cash used in continuing operations	(220.6)	(9.5)
Net operating cash flows of discontinued operations	(0.3)	(1.1)
Effect of exchange rate changes on cash, cash equivalents and restricted cash	(3.3)	(1.0)
Net decrease in cash, cash equivalents and restricted cash	(224.2)	(11.6)
Cash, cash equivalents and restricted cash at beginning of period	349.4	381.5
Cash, cash equivalents and restricted cash at end of period	125.2	369.9
Significant non-cash investing and financing activities:
Financing lease obligation incurred	9.1	5.8
Common stock issuance for purchase of noncontrolling interests	2.7	0.0
Common stock issuance for acquisition	$ 5.0	$ 0.0