Legal Proceedings, Commitments and Contingencies (Detail) $ in Millions		1 Months Ended	12 Months Ended
	Apr. 24, 2009 USD ($)	Jun. 30, 2006 subsidiary	Dec. 31, 2023 USD ($)	Dec. 31, 2022 USD ($)	May 31, 2017 lawsuit
Loss Contingencies [Line Items]
Damages sought by plaintiff			$ 52
Liabilities recorded relative to environmental matters			$ 680	$ 696
Environmental Loss Contingency, Statement of Financial Position [Extensible Enumeration]			Other noncurrent liabilities	Other noncurrent liabilities
Environmental costs eligible for future recovery			$ 613	$ 618
Time period environmental costs and recovery of environmental costs are projected over			20 years
Outstanding letters of credit, surety bonds, and third-party guarantees			$ 2,900	2,900
Third-party guarantees outstanding			$ 1,000	$ 904
Percentage of total guarantees that relate to guarantees of contractual performance of joint ventures			75.00%	71.00%
N.Y. Metropolitan Transportation Authority
Loss Contingencies [Line Items]
Damages sought by plaintiff	$ 190
Contract value	323
Contract payments received to date	241
Claims for monetary damages against the plaintiff	$ 95
Sikorsky Aircraft Corporation
Loss Contingencies [Line Items]
Number of pending lawsuits | lawsuit					2
Number of entities involved in litigation | subsidiary		2