Prior-Period Financial Statements - Consolidated Statement of Cash Flows (Unaudited) (Details) - USD ($) $ in Millions		3 Months Ended
		Apr. 02, 2017	Apr. 03, 2016
New Accounting Pronouncements
Net earnings		$ 763	$ 641
Depreciation of property, plant and equipment		92	89
Amortization of intangible assets		19	27
Equity-based compensation expense		22	27
Excess tax benefit from equity-based compensation			0
Deferred income tax provision (benefit)		45	(18)
Discontinued operations		0	13
Accounts receivable		(84)	(210)
Unbilled receivables		(338)	(276)
Inventories		2	(221)
Accounts payable		(72)	179
Customer advances and deposits		(95)	(18)
Income taxes payable		202	253
Other current liabilities		(76)	(52)
Other, net		53	46
Net cash provided by operating activities	[1]	533	480
Capital expenditures		(62)	(65)
Other, net		(23)	(53)
Net cash used by investing activities		(85)	(118)
Purchases of common stock		(354)	(1,026)
Dividends paid		(230)	(215)
Other, net		(22)	7
Net cash used by financing activities		(606)	(1,234)
Net cash used by discontinued operations		(8)	(6)
Net decrease in cash and equivalents		(166)	(878)
Cash and equivalents at beginning of period		2,334	2,785
Cash and equivalents at end of period		2,168	1,907
Previously Reported
New Accounting Pronouncements
Net earnings			717
Depreciation of property, plant and equipment			90
Amortization of intangible assets			27
Equity-based compensation expense			27
Excess tax benefit from equity-based compensation			(15)
Deferred income tax provision (benefit)			20
Discontinued operations			13
Accounts receivable			(195)
Unbilled receivables			(337)
Inventories			(133)
Accounts payable			179
Customer advances and deposits			(209)
Income taxes payable			268
Other current liabilities			(70)
Other, net			57
Net cash provided by operating activities			439
Capital expenditures			(65)
Other, net			(53)
Net cash used by investing activities			(118)
Purchases of common stock			(1,026)
Dividends paid			(215)
Other, net			48
Net cash used by financing activities			(1,193)
Net cash used by discontinued operations			(6)
Net decrease in cash and equivalents			(878)
Cash and equivalents at beginning of period		2,334	2,785
Cash and equivalents at end of period			1,907
Accounting Standards Update 2016-09 | Restatement Adjustment
New Accounting Pronouncements
Net earnings			15
Depreciation of property, plant and equipment			0
Amortization of intangible assets			0
Equity-based compensation expense			0
Excess tax benefit from equity-based compensation			15
Deferred income tax provision (benefit)			0
Discontinued operations			0
Accounts receivable			0
Unbilled receivables			0
Inventories			0
Accounts payable			0
Customer advances and deposits			0
Income taxes payable			(15)
Other current liabilities			26
Other, net			0
Net cash provided by operating activities			41
Capital expenditures			0
Other, net			0
Net cash used by investing activities			0
Purchases of common stock			0
Dividends paid			0
Other, net			(41)
Net cash used by financing activities			(41)
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
Accounting Standards Update 2014-09 | Restatement Adjustment
New Accounting Pronouncements
Net earnings			(91)
Depreciation of property, plant and equipment			(1)
Amortization of intangible assets			0
Equity-based compensation expense			0
Excess tax benefit from equity-based compensation			0
Deferred income tax provision (benefit)			(38)
Discontinued operations			0
Accounts receivable			(15)
Unbilled receivables			61
Inventories			(88)
Accounts payable			0
Customer advances and deposits			191
Income taxes payable			0
Other current liabilities			(8)
Other, net			(11)
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
Accounting Standards Update 2015-17 | Restatement Adjustment
New Accounting Pronouncements
Net earnings			0
Depreciation of property, plant and equipment			0
Amortization of intangible assets			0
Equity-based compensation expense			0
Excess tax benefit from equity-based compensation			0
Deferred income tax provision (benefit)			0
Discontinued operations			0
Accounts receivable			0
Unbilled receivables			0
Inventories			0
Accounts payable			0
Customer advances and deposits			0
Income taxes payable			0
Other current liabilities			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

[1] * Continuing operations only