Segment Financial Data (Assets) (Details) - USD ($) $ in Millions	Jun. 30, 2025	Dec. 31, 2024
Segment Reporting Information [Line Items]
Total assets	$ 167,139	$ 162,861
Operating segments
Segment Reporting Information [Line Items]
Total assets	166,772	161,615
Operating segments | Collins Aerospace Systems
Segment Reporting Information [Line Items]
Total assets	74,247	72,372
Operating segments | Pratt & Whitney
Segment Reporting Information [Line Items]
Total assets	47,670	44,307
Operating segments | Raytheon
Segment Reporting Information [Line Items]
Total assets	44,855	44,936
Corporate, eliminations, and other
Segment Reporting Information [Line Items]
Total assets	$ 367	$ 1,246