Income Taxes (Schedule of Effective Income Tax Rate Reconciliation) (Details) - USD ($) $ in Millions	3 Months Ended	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Effective Tax Rate Reconciliation, Percent
Statutory U.S. federal income tax rate		21.00%	21.00%	21.00%
Tax on international activities		(4.10%)	(1.10%)	0.70%
Tax audit settlements		0.00%	0.00%	(7.00%)
Tax charges related to Separation Transactions and Raytheon Merger		(0.80%)	(17.70%)	0.00%
Disposals of businesses		2.20%	(7.50%)	0.00%
U.S. research and development credit		(3.50%)	6.10%	(2.40%)
Goodwill impairment		0.00%	(28.40%)	0.00%
State income tax, net		0.70%	2.40%	0.40%
Foreign Derived Intangible Income (FDII)		(2.50%)	3.50%	(3.30%)
U.K. corporate tax rate enactment		1.50%	(0.40%)	0.00%
Other		1.40%	(2.30%)	0.70%
Effective income tax rate		15.90%	(24.40%)	10.10%
Effective Tax Rate Reconciliation, Amount
Statutory U.S. federal income tax rate		$ 1,036	$ (494)	$ 872
Tax on international activities		(204)	27	32
Tax audit settlements	$ (25)	0	0	(290)
Tax charges related to Separation Transactions and Raytheon Merger		(39)	416	0
Disposals of businesses		108	177	0
U.S. research and development credit		(172)	(142)	(101)
Goodwill impairment		0	668	0
State income tax, net		33	(56)	16
Foreign Derived Intangible Income (FDII)		(121)	(83)	(138)
Effective Income Tax Rate Reconciliation, Change in U.K. Enacted Tax Rate, Amount		73	8	0
Other		72	54	30
Effective income tax rate		$ 786	$ 575	$ 421