CONDENSED CONSOLIDATED BALANCE SHEETS (USD $) In Millions, unless otherwise specified	Jun. 30, 2013	Dec. 30, 2012
Current assets:
Cash and cash equivalents	$ 49.7	$ 49.0
Restricted cash	5.2	5.5
Accounts receivable, net	253.6	271.9
Inventoried costs	85.3	94.3
Prepaid expenses	18.4	17.4
Other current assets	5.6	17.3
Total current assets	417.8	455.4
Property, plant and equipment, net	83.5	85.6
Goodwill	596.4	596.4
Intangible assets, net	87.8	106.1
Other assets	36.8	40.4
Total assets	1,222.3	1,283.9
Current liabilities:
Accounts payable	64.9	83.6
Accrued expenses	39.1	46.4
Accrued compensation	39.8	47.8
Accrued interest	6.1	6.3
Billings in excess of costs and earnings on uncompleted contracts	45.6	43.7
Deferred income tax liability	29.0	28.9
Other current liabilities	14.1	22.1
Total current liabilities	238.6	278.8
Long-term debt principal, net of current portion	629.3	629.7
Long-term debt premium	16.6	18.7
Other long-term liabilities	29.7	32.6
Total liabilities	914.2	959.8
Commitments and contingencies
Stockholders’ equity:
Preferred stock, $0.001 par value, 5,000,000 shares authorized, 0 shares outstanding at December 30, 2012 and June 30, 2013	0	0
Common stock, $0.001 par value, 195,000,000 shares authorized; 56,613,024 and 56,675,080 shares issued and outstanding at December 30, 2012 and June 30, 2013, respectively	0	0
Additional paid-in capital	850.9	847.1
Accumulated other comprehensive loss	(0.7)	(0.8)
Accumulated deficit	(542.1)	(522.2)
Total stockholders' equity	308.1	324.1
Total liabilities and stockholders’ equity	$ 1,222.3	$ 1,283.9