Business Combinations (Raytheon Company Consideration Transferred) (Details) - Raytheon Company [Member] $ / shares in Units, $ in Millions	Apr. 03, 2020 USD ($) $ / shares shares
Business Acquisition [Line Items]
Fair value of RTC common stock issued for Raytheon Company outstanding common stock and vested equity awards | $	$ 33,067
Fair value attributable to pre-merger service for replacement equity awards | $	99
Total merger consideration | $	$ 33,166
Number of Raytheon Company common shares outstanding as of April 3, 2020	277,300,000
Number of Raytheon Company stock awards vested as a result of the Raytheon Merger (1)	400,000
Total outstanding shares of Raytheon Company common stock and equity awards entitled to merger consideration	277,700,000
Agreed Upon Number Shares of Common Stock of UTC which each share of Raytheon Common Stock will be Converted Into	2.3348
Shares of RTC common stock issued for Raytheon Company outstanding common stock and vested equity awards	648,400,000
Price per share of RTC common stock (3) | $ / shares	$ 51.00