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Commitments and Contingencies (Details) $ in Millions							1 Months Ended					3 Months Ended
Commitments and Contingencies (Details) $ in Millions	Aug. 29, 2026 USD ($)	Aug. 29, 2025 USD ($)	Oct. 16, 2024 USD ($) contract count	Oct. 15, 2024 USD ($)	Sep. 30, 2024 USD ($)	Aug. 29, 2024 USD ($)	Sep. 30, 2024 USD ($)	Dec. 31, 2023 USD ($)	Apr. 30, 2019 USD ($)	Dec. 31, 2018 USD ($)	Dec. 31, 2013 USD ($)	Mar. 31, 2025 USD ($) claim action	Dec. 31, 2024 USD ($)	Mar. 31, 2024 USD ($)	Sep. 30, 2023 USD ($)
Loss Contingencies [Line Items]
Reserve for environmental remediation												$ 800	$ 800
Financing and other contractual commitments												13,900	14,100
Operating profit charge												(2,035)		$ (1,870)
Other accrued liabilities												15,219	14,831
Thales-Raytheon Systems and Related Matters
Loss Contingencies [Line Items]
Compliance period				3 years
Payment for loss contingency accrued													384
Thales-Raytheon Systems and Related Matters \| Deferred Prosecution Agreement (DPA-1)
Loss Contingencies [Line Items]
Compliance period				3 years
Damages sought				$ 282
Thales-Raytheon Systems and Related Matters \| Securities and Exchange Commission (SEC)
Loss Contingencies [Line Items]
Damages sought				$ 102
Trade Compliance Matters
Loss Contingencies [Line Items]
Loss contingency accrual												251
Trade Compliance Matters \| Consent Agreement
Loss Contingencies [Line Items]
Agreement term						3 years
Damages sought						$ 200
Trade Compliance Matters \| Consent Agreement, Suspensible Portion
Loss Contingencies [Line Items]
Damages sought						100
Trade Compliance Matters \| Consent Agreement, Non-Suspensible Portion
Loss Contingencies [Line Items]
Damages sought						$ 100
Payments for legal settlements							$ 34
Trade Compliance Matters \| Consent Agreement, Non-Suspensible Portion \| Forecast [Member]
Loss Contingencies [Line Items]
Payments for legal settlements	$ 33	$ 33
2019 U.S. Defense Contract Management Agency Claim Against Pratt & Whitney
Loss Contingencies [Line Items]
Damages sought									$ 1,700
Interest sought												1,300
2019 U.S. Defense Contract Management Agency Second Claim Against Pratt & Whitney
Loss Contingencies [Line Items]
Damages sought					$ 1,100
Interest sought												$ 331
U.S. Defense Contract Management Agency Claim Against Pratt & Whitney
Loss Contingencies [Line Items]
Number of pending claims \| claim												3
2013 U.S. Defense Contract Management Agency Claim Against Pratt & Whitney
Loss Contingencies [Line Items]
Damages sought											$ 177
Interest sought												$ 190
2018 U.S. Defense Contract Management Agency Claim Against Pratt & Whitney
Loss Contingencies [Line Items]
Damages sought										$ 269
Interest sought												163
U. S. Defense Contract Management Agency Claim Against Pratt Whitney Third Claim
Loss Contingencies [Line Items]
Damages sought								$ 277
Interest sought												$ 86
DOJ Investigation and Contract Pricing Disputes
Loss Contingencies [Line Items]
Payment for loss contingency accrued													580
DOJ Investigation and Contract Pricing Disputes \| Second Deferred Prosecution Agreement (DPA-2)
Loss Contingencies [Line Items]
Compliance period			3 years	3 years
Damages sought			$ 147
Number of counts \| count			2
Number of legacy contracts \| contract			2
DOJ Investigation and Contract Pricing Disputes \| False Claims Act (FCA)
Loss Contingencies [Line Items]
Damages sought			$ 433
Powder Metal Disclosure
Loss Contingencies [Line Items]
Number of pending claims \| claim												2
Number of pending civil actions \| action												2
Pratt & Whitney \| PW1100 GTF Program
Loss Contingencies [Line Items]
Operating profit charge															$ 2,900
Net program share percentage															51.00%
Increase in accrued liabilities															$ 2,800
Other accrued liabilities												$ 1,400	$ 1,700
Other Financing Arrangements
Loss Contingencies [Line Items]
Other commitment												3,100
Industrial Participation Obligations
Loss Contingencies [Line Items]
Other commitment												$ 11,700