Balance Sheet Details (Tables)

12 Months Ended

Dec. 29, 2013

Balance Sheet Details Disclosure [Abstract]

Schedule of Accounts, Notes, Loans and Financing Receivable

Accounts receivable, net

Receivables including amounts due under long-term contracts are summarized as follows:

	December 30, 2012			December 29, 2013
Billed, current	$	137.9		$	150.2
Unbilled, current	135.4			117.9
Total current accounts receivable	273.3			268.1
Allowance for doubtful accounts	(1.4		)	(2.3		)
Total current accounts receivable, net	271.9			265.8
Unbilled, long-term (included in other assets)	0.3			0.1
Total accounts receivable, net	$	272.2		$	265.9

U.S. Government contract receivables (included in accounts receivable, net)

	December 30, 2012		December 29, 2013
Billed	$	24.6	$	19.8
Unbilled	39.4		31.6
Total U.S. Government contract receivables	$	64.0	$	51.4

Schedule of Inventory, Current

Inventoried costs, net of progress payments

	December 30, 2012			December 29, 2013
Raw materials	$	48.4		$	44.5
Work in process	36.5			24.3
Finished goods	7.3			4.6
Supplies and other	2.2			1.9
Subtotal inventoried costs	94.4			75.3
Less customer advances and progress payments	(0.1		)	(0.7		)
Total inventoried costs	$	94.3		$	74.6

Property, Plant and Equipment

Assets are depreciated predominately using the straight-line method, with the following lives:

	Years
Buildings and improvements	15 - 39
Machinery and equipment	3 - 10
Computer equipment and software	1 - 10
Vehicles, furniture, and office equipment	5
Leasehold improvements	Shorter of useful life or length of lease

Property and equipment, net

	December 30, 2012			December 29, 2013
Land and buildings	$	20.8		$	21.0
Computer equipment and software	17.2			20.0
Machinery and equipment	49.9			59.0
Furniture and office equipment	12.2			15.4
Facility under capital lease	1.0			1.0
Leasehold improvements	13.9			13.7
Construction in progress	5.8			4.8
Property and equipment	120.8			134.9
Accumulated depreciation and amortization	(35.2		)	(50.1		)
Total property and equipment, net	$	85.6		$	84.8