Consolidated Statement of Changes in Equity - USD ($) shares in Thousands, $ in Millions	Total	Raytheon Company [Member]	Rockwell Collins [Member]	Common Stock [Member]	Common Stock [Member] Raytheon Company [Member]	Common Stock [Member] Rockwell Collins [Member]	Treasury Stock [Member]	Treasury Stock [Member] Raytheon Company [Member]	Treasury Stock [Member] Rockwell Collins [Member]	Retained Earnings [Member]	Retained Earnings [Member] ASU 2014-09 [Member]	Unearned ESOP Shares [Member]	Accumulated Other Comprehensive (Loss) Income [Member]	Noncontrolling Interest
Increase (Decrease) In Equity [Roll Forward]
Stockholders' Equity Attributable to Parent				$ 17,574			$ (35,596)			$ 55,242		$ (85)	$ (7,525)
Noncontrolling interest														$ 1,811
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest	$ 31,421
Common Stock issued under employee plans				423			6					9
Stock Issued During Period, Value, Acquisitions			$ 7,960		$ 0	$ 4,523		$ 0	$ 3,437
Separation of Carrier and Otis				0						0			0	0
Purchase of subsidiary shares from noncontrolling interest, net				(6)
Common Stock repurchased							(329)
Net Income - Retained Earnings	$ 5,269									5,269
Dividends on Common Stock										(2,170)
Dividends on ESOP Common Stock										(71)
Redeemable noncontrolling interest fair value adjustment										7
Reclassification from OCI, current period, ASU 2018-02 adoption impact										0			0
Other							0			26	$ (480)			6
Other comprehensive income (loss), net of tax - AOCI													(1,808)
Net Income - NCI														385
Redeemable Noncontrolling Interest in subsidiaries' earnings														(4)
Other comprehensive income (loss), net of tax - NCI														(30)
Dividends attributable to noncontrolling interest														(315)
Sale (purchase) of subsidiary shares from noncontrolling interest, net														(23)
Acquisition (disposition) of noncontrolling interest, net														(8)
Capital contributions (distributions)														342
Shares of Common Stock issued under employee plans, net	2,775
Shares of Common Stock repurchased	2,727
Shares of Common Stock issued for Raytheon Company outstanding common stock & equity awards		0
Dividends Per Share of Common Stock	$ 2.84
Stockholders' Equity Attributable to Parent				22,514			(32,482)			57,823		(76)	(9,333)
Noncontrolling interest														2,164
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest	$ 40,610
Common Stock issued under employee plans				525			7					12
Stock Issued During Period, Value, Acquisitions					0	0		0	0
Separation of Carrier and Otis				0						0			0	0
Purchase of subsidiary shares from noncontrolling interest, net				(20)
Common Stock repurchased							(151)
Net Income - Retained Earnings	5,537									5,537
Dividends on Common Stock										(2,442)
Dividends on ESOP Common Stock										(70)
Redeemable noncontrolling interest fair value adjustment										4
Reclassification from OCI, current period, ASU 2018-02 adoption impact	$ (745)									745			(745)
Other							0			(3)	0			0
Other comprehensive income (loss), net of tax - AOCI													(71)
Net Income - NCI														411
Redeemable Noncontrolling Interest in subsidiaries' earnings														7
Other comprehensive income (loss), net of tax - NCI														(12)
Dividends attributable to noncontrolling interest														(268)
Sale (purchase) of subsidiary shares from noncontrolling interest, net														70
Acquisition (disposition) of noncontrolling interest, net														(23)
Capital contributions (distributions)														108
Shares of Common Stock issued under employee plans, net	3,883
Shares of Common Stock repurchased	1,133
Shares of Common Stock issued for Raytheon Company outstanding common stock & equity awards		0
Dividends Per Share of Common Stock	$ 2.94
Stockholders' Equity Attributable to Parent	$ 41,774			23,019			(32,626)			61,594		(64)	(10,149)
Noncontrolling interest	2,457													2,457
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest	44,231
Common Stock issued under employee plans				417			2					15
Stock Issued During Period, Value, Acquisitions					$ 10,897	$ 0		$ 22,269	$ 0
Separation of Carrier and Otis				2,598						(5,805)			3,875	(865)
Purchase of subsidiary shares from noncontrolling interest, net				(1)
Common Stock repurchased							(43)
Net Income - Retained Earnings	$ (3,519)									(3,519)
Dividends on Common Stock										(2,732)
Dividends on ESOP Common Stock										(50)
Redeemable noncontrolling interest fair value adjustment										0
Reclassification from OCI, current period, ASU 2018-02 adoption impact										0			0
Other							(9)			(65)	$ 0			0
Other comprehensive income (loss), net of tax - AOCI													2,540
Net Income - NCI														224
Redeemable Noncontrolling Interest in subsidiaries' earnings														(4)
Other comprehensive income (loss), net of tax - NCI														0
Dividends attributable to noncontrolling interest														(159)
Sale (purchase) of subsidiary shares from noncontrolling interest, net														66
Acquisition (disposition) of noncontrolling interest, net														1
Capital contributions (distributions)														(31)
Shares of Common Stock issued under employee plans, net	2,689
Shares of Common Stock repurchased	330
Shares of Common Stock issued for Raytheon Company outstanding common stock & equity awards		652,638
Dividends Per Share of Common Stock	$ 2.16
Stockholders' Equity Attributable to Parent	$ 72,163			$ 36,930			$ (10,407)			$ 49,423		$ (49)	$ (3,734)
Noncontrolling interest	1,689													$ 1,689
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest	$ 73,852