v3.25.3
Summary of Significant Accounting Policies - Additional Information (Details)
9 Months Ended
Sep. 28, 2025
Accounting Policies [Abstract]
Length of fiscal quarters, weeks
91 days
X
- Definition
Length of fiscal quarters, weeks
+ References
No definition available.
+ Details
Name:
gd_LengthOfFiscalQuartersWeeks
Namespace Prefix:
gd_
Data Type:
xbrli:durationItemType
Balance Type:
na
Period Type:
duration
X
- References
No definition available.
+ Details
Name:
us-gaap_AccountingPoliciesAbstract
Namespace Prefix:
us-gaap_
Data Type:
xbrli:stringItemType
Balance Type:
na
Period Type:
duration