Acquisition and Divestitures - Operating Results Reflected within Earnings from Discontinued Operations, Net of Tax (Detail) - USD ($) $ in Millions	3 Months Ended				12 Months Ended
	Dec. 31, 2017	Sep. 24, 2017	Jun. 25, 2017	Mar. 26, 2017	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Net earnings from discontinued operations	$ 73	$ 0	$ 0	$ 0	$ 0	$ 73	$ 1,512
Discontinued Operations, Disposed of by Sale | Information Systems & Global Solutions
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Net sales							3,410
Cost of sales							(2,953)
Severance charges							(19)
Gross profit							438
Other income, net							16
Operating profit							454
Earnings from discontinued operations before income taxes							454
Income tax expense							(147)
Net gain on divestiture of discontinued operations							1,205
Net earnings from discontinued operations							$ 1,512