CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($) $ in Millions	Jun. 25, 2023	Dec. 25, 2022
Current assets:
Cash and cash equivalents	$ 48.2	$ 81.3
Accounts receivable, net	115.7	105.7
Unbilled receivables, net	222.0	222.8
Inventoried costs	145.9	125.5
Prepaid expenses	12.8	11.9
Other current assets	43.2	35.4
Total current assets	587.8	582.6
Property, plant and equipment, net	218.6	213.1
Operating lease right-of-use assets	48.2	47.4
Goodwill	558.2	558.2
Intangible assets, net	52.2	55.2
Other assets	97.8	95.0
Total assets	1,562.8	1,551.5
Current liabilities:
Accounts payable	58.4	57.3
Accrued expenses	41.0	33.8
Accrued compensation	54.0	52.2
Accrued interest	1.5	1.5
Billings in excess of costs and earnings on uncompleted contracts	73.1	62.1
Current portion of operating lease liabilities	11.6	10.8
Other current liabilities	10.4	15.6
Current liabilities of discontinued operations	0.9	0.9
Total current liabilities	250.9	234.2
Long-term debt, net of current portion	232.1	250.2
Operating lease liabilities, net of current portion	41.0	40.8
Other long-term liabilities	77.4	77.4
Long-term liabilities of discontinued operations	1.1	1.4
Total liabilities	602.5	604.0
Commitments and contingencies (Note 14)
Redeemable noncontrolling interest	14.7	11.2
Stockholders’ equity:
Preferred stock, $0.001 par value, 5,000,000 shares authorized, 0 shares outstanding at June 25, 2023 and December 25, 2022	0.0	0.0
Common stock, $0.001 par value, 195,000,000 shares authorized; 127,641,905 and 125,985,306 shares issued and outstanding at June 25, 2023 and December 25, 2022, respectively	0.0	0.0
Additional paid-in capital	1,623.7	1,608.4
Accumulated other comprehensive income (loss)	2.9	(0.8)
Accumulated deficit	(681.0)	(671.3)
Total stockholders’ equity	945.6	936.3
Total liabilities and stockholders’ equity	$ 1,562.8	$ 1,551.5