CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($) $ in Millions	Oct. 01, 2023	Dec. 25, 2022
Current assets:
Cash and cash equivalents	$ 42.2	$ 81.3
Accounts receivable, net	128.2	105.7
Unbilled receivables, net	223.7	222.8
Inventoried costs	150.1	125.5
Prepaid expenses	18.3	11.9
Other current assets	41.9	35.4
Total current assets	604.4	582.6
Property, plant and equipment, net	227.3	213.1
Operating lease right-of-use assets	50.6	47.4
Goodwill	558.2	558.2
Intangible assets, net	50.7	55.2
Other assets	99.6	95.0
Total assets	1,590.8	1,551.5
Current liabilities:
Accounts payable	57.4	57.3
Accrued expenses	40.3	33.8
Accrued compensation	55.2	52.2
Accrued interest	1.8	1.5
Billings in excess of costs and earnings on uncompleted contracts	79.4	62.1
Current portion of operating lease liabilities	12.1	10.8
Other current liabilities	15.9	15.6
Current liabilities of discontinued operations	0.9	0.9
Total current liabilities	263.0	234.2
Long-term debt, net of current portion	234.2	250.2
Operating lease liabilities, net of current portion	43.0	40.8
Other long-term liabilities	76.8	77.4
Long-term liabilities of discontinued operations	1.1	1.4
Total liabilities	618.1	604.0
Commitments and contingencies (Note 14)
Redeemable noncontrolling interest	19.3	11.2
Stockholders’ equity:
Preferred stock, $0.001 par value, 5,000,000 shares authorized, 0 shares outstanding at October 1, 2023 and December 25, 2022	0.0	0.0
Common stock, $0.001 par value, 195,000,000 shares authorized; 128,072,596 and 125,985,306 shares issued and outstanding at October 1, 2023 and December 25, 2022, respectively	0.0	0.0
Additional paid-in capital	1,633.5	1,608.4
Accumulated other comprehensive income (loss)	2.5	(0.8)
Accumulated deficit	(682.6)	(671.3)
Total stockholders’ equity	953.4	936.3
Total liabilities and stockholders’ equity	$ 1,590.8	$ 1,551.5