Prior-Period Financial Statements - Consolidated Statement of Cash Flows (Unaudited) (Details) - USD ($) $ in Millions		3 Months Ended		6 Months Ended
		Jul. 02, 2017	Jul. 03, 2016	Jul. 02, 2017	Jul. 03, 2016
New Accounting Pronouncements
Net earnings		$ 749	$ 714	$ 1,512	$ 1,355
Depreciation of property, plant and equipment				182	181
Amortization of intangible assets		19	23	38	50
Equity-based compensation expense				49	51
Deferred income tax provision				93	10
Discontinued operations				0	13
Accounts receivable				(291)	(38)
Unbilled receivables				(815)	(523)
Inventories				(14)	(84)
Accounts payable				82	157
Customer advances and deposits				(29)	(455)
Other, net				203	156
Net cash provided by operating activities	[1]			1,010	873
Capital expenditures				(153)	(134)
Other, net				(42)	(51)
Net cash used by investing activities				(195)	(185)
Purchases of common stock				(901)	(1,189)
Dividends paid		(253)	(232)	(483)	(447)
Other, net				108	96
Net cash used by financing activities				(1,276)	(1,540)
Net cash used by discontinued operations				(17)	(34)
Net decrease in cash and equivalents				(478)	(886)
Cash and equivalents at beginning of period				2,334	2,785
Cash and equivalents at end of period		$ 1,856	1,899	1,856	1,899
Previously Reported
New Accounting Pronouncements
Net earnings			758		1,475
Depreciation of property, plant and equipment					182
Amortization of intangible assets					50
Equity-based compensation expense					51
Deferred income tax provision					62
Discontinued operations					13
Accounts receivable					(83)
Unbilled receivables					(619)
Inventories					(150)
Accounts payable					157
Customer advances and deposits					(423)
Other, net					158
Net cash provided by operating activities					873
Capital expenditures					(134)
Other, net					(51)
Net cash used by investing activities					(185)
Purchases of common stock					(1,189)
Dividends paid					(447)
Other, net					96
Net cash used by financing activities					(1,540)
Net cash used by discontinued operations					(34)
Net decrease in cash and equivalents					(886)
Cash and equivalents at beginning of period				2,334	2,785
Cash and equivalents at end of period			1,899		1,899
Accounting Standards Update 2016-09 | Restatement Adjustment
New Accounting Pronouncements
Net earnings			(15)		0
Depreciation of property, plant and equipment					0
Amortization of intangible assets					0
Equity-based compensation expense					0
Deferred income tax provision					0
Discontinued operations					0
Accounts receivable					0
Unbilled receivables					0
Inventories					0
Accounts payable					0
Customer advances and deposits					0
Other, net					0
Net cash provided by operating activities					0
Capital expenditures					0
Other, net					0
Net cash used by investing activities					0
Purchases of common stock					0
Dividends paid					0
Other, net					0
Net cash used by financing activities					0
Net cash used by discontinued operations					0
Net decrease in cash and equivalents					0
Cash and equivalents at beginning of period				0	0
Cash and equivalents at end of period			0		0
Accounting Standards Update 2014-09 | Restatement Adjustment
New Accounting Pronouncements
Net earnings			(29)		(120)
Depreciation of property, plant and equipment					(1)
Amortization of intangible assets					0
Equity-based compensation expense					0
Deferred income tax provision					(52)
Discontinued operations					0
Accounts receivable					45
Unbilled receivables					96
Inventories					66
Accounts payable					0
Customer advances and deposits					(32)
Other, net					(2)
Net cash provided by operating activities					0
Capital expenditures					0
Other, net					0
Net cash used by investing activities					0
Purchases of common stock					0
Dividends paid					0
Other, net					0
Net cash used by financing activities					0
Net cash used by discontinued operations					0
Net decrease in cash and equivalents					0
Cash and equivalents at beginning of period				0	0
Cash and equivalents at end of period			0		0
Accounting Standards Update 2015-17 | Restatement Adjustment
New Accounting Pronouncements
Net earnings			0		0
Depreciation of property, plant and equipment					0
Amortization of intangible assets					0
Equity-based compensation expense					0
Deferred income tax provision					0
Discontinued operations					0
Accounts receivable					0
Unbilled receivables					0
Inventories					0
Accounts payable					0
Customer advances and deposits					0
Other, net					0
Net cash provided by operating activities					0
Capital expenditures					0
Other, net					0
Net cash used by investing activities					0
Purchases of common stock					0
Dividends paid					0
Other, net					0
Net cash used by financing activities					0
Net cash used by discontinued operations					0
Net decrease in cash and equivalents					0
Cash and equivalents at beginning of period				$ 0	0
Cash and equivalents at end of period			$ 0		$ 0

[1] * Continuing operations only