Acquisitions and Divestitures - Schedule of Net Sales and Income Before Income Taxes for MSI, BSI and Tinsley Product Line (Detail) - MSI, BSI and Tinsley Product Line [Member] - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 25, 2015	Sep. 26, 2014	Sep. 25, 2015	Sep. 26, 2014
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Net sales	$ 1	$ 126	$ 201	$ 420
Income before income taxes	$ 1	$ 3	$ 2	$ 13