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DIVESTITURE - Narrative (Details) - USD ($) $ in Millions		3 Months Ended		9 Months Ended
	Aug. 16, 2016	Sep. 24, 2017	Sep. 25, 2016	Sep. 24, 2017	Sep. 25, 2016
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Net gain on divestiture of business segment				$ 0	$ 1,234
Fair value of shares of common stock tendered and retired					2,497
One-time special cash payment received				0	1,800
IS&GS | Restatement Adjustment
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Corporate overhead costs reclassified to and included in earnings			$ 17		82
IS&GS | Continuing operations
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Non-service pension costs reclassified to and included in continuing operations			11		54
Discontinued Operations, Disposed of by Sale | IS&GS
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Reduction to common stock outstanding (as a percent)	3.00%
Net gain on divestiture of business segment			$ 1,200		1,200
Fair value of shares of common stock tendered and retired	$ 2,500				2,500
One-time special cash payment received	1,800				1,800
Net book value	3,000
Other adjustments	$ 100				$ 100
Working capital and tax adjustments within net earnings from discontinued operations		$ 0		$ 0
Discontinued Operations, Disposed of by Sale | IS&GS | Lockheed Martin
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Common stock exchanged (in shares)	9,369,694

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