Segment Financial Data (Components of Identifiable Assets) (Details) - USD ($) $ in Millions	Sep. 30, 2020	Dec. 31, 2019
Segment Reporting, Asset Reconciling Item [Line Items]
Assets	$ 162,399	$ 139,615
Collins Aerospace Systems [Member]
Segment Reporting, Asset Reconciling Item [Line Items]
Assets	68,870	74,049
Pratt & Whitney [Member]
Segment Reporting, Asset Reconciling Item [Line Items]
Assets	32,240	31,170
Raytheon Intelligence & Space [Member]
Segment Reporting, Asset Reconciling Item [Line Items]
Assets	20,509	0
Raytheon Missiles & Defense
Segment Reporting, Asset Reconciling Item [Line Items]
Assets	29,720	0
Discontinued Operations
Segment Reporting, Asset Reconciling Item [Line Items]
Assets	56	31,823
Operating Segments
Segment Reporting, Asset Reconciling Item [Line Items]
Assets	151,339	105,219
Corporate, Non-Segment
Segment Reporting, Asset Reconciling Item [Line Items]
Assets	$ 11,004	$ 2,573