EBP, Change in Net Asset Available for Benefit, Notes Receivable Account Balance, Transfer to (from) Plan

No definition available.

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- Definition

EBP, Change in Net Asset Available for Benefit, Participant Account Balance, Transfer to (from) Plan

+ References

No definition available.

+ Details

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- Definition

EBP, Change in Net Asset Available for Benefit, Transfer to Plan, Balance

+ References

No definition available.

+ Details

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Period Type:	duration

- Definition

EBP, Change in Net Asset Available for Benefit, Transfer to Plan, Notes Receivable from Participants

+ References

No definition available.

+ Details

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- Definition

EBP, Employer Discretionary Contribution Amount

+ References

No definition available.

+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

EBP, Minimum Age for Participation in Plan

+ References

No definition available.

+ Details

Name:	gd_EBPMinimumAgeForParticipationInPlan
Namespace Prefix:	gd_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

- References

No definition available.

+ Details

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- Definition

EBP, Note Receivable From Participant, Account, Primary Residence, Borrowing Term

+ References

No definition available.

+ Details

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Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	instant

- Definition

EBP, Note Receivable From Participant, General Loan, Maximum Borrowing Term

+ References

No definition available.

+ Details

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Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

EBP, Note Receivable from Participant, Maximum Number of Notes Outstanding

+ References

No definition available.

+ Details

Name:	gd_EBPNoteReceivableFromParticipantMaximumNumberOfNotesOutstanding
Namespace Prefix:	gd_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

- Definition

EBP, Note Receivable from Participant, Primary Residence, Number of Notes Outstanding

+ References

No definition available.

+ Details

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Namespace Prefix:	gd_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

- Definition

EBP, Participant Contribution, Maximum Contribution to Eligible Compensation, Percentage

+ References

No definition available.

+ Details

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Namespace Prefix:	gd_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

EBP, Participant Contributions and Earnings, Vesting Percentage

+ References

No definition available.

+ Details

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Namespace Prefix:	gd_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

EBP, Participant Loan, Basis Spread On Variable Rate

+ References

No definition available.

+ Details

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Namespace Prefix:	gd_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

EBP, Safe Harbor, Employer Contribution Vesting Service Period

+ References

No definition available.

+ Details

Name:	gd_EBPSafeHarborEmployerContributionVestingServicePeriod
Namespace Prefix:	gd_
Data Type:	xbrli:durationItemType
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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 962
-SubTopic 205
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147478416/962-205-50-1

+ Details

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Namespace Prefix:	us-gaap-ebp_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Percentage of employer matching contribution on eligible participant contribution to employee stock purchase, saving, or similar plan (employee benefit plan (EBP)).

+ References

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Topic 962
-SubTopic 325
-Name Accounting Standards Codification
-Section 55
-Paragraph 17
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147478873/962-325-55-17

+ Details

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Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Percentage of participant compensation eligible for employer matching contribution for participant in employee stock purchase, saving, or similar plan (employee benefit plan (EBP)).

+ References

+ Details

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Namespace Prefix:	us-gaap-ebp_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Amount of maximum account balance that participant in employee stock purchase, saving, or similar plan (employee benefit plan (EBP)) can borrow.

+ References

+ Details

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Namespace Prefix:	us-gaap-ebp_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Percentage of maximum account balance that participant in employee stock purchase, saving, or similar plan (employee benefit plan (EBP)) can borrow to total participant account balance.

+ References

+ Details

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Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Percentage of eligible compensation contributed for participant automatically enrolled in employee stock purchase, saving, or similar plan (employee benefit plan (EBP)).

+ References

+ Details

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Namespace Prefix:	us-gaap-ebp_
Data Type:	dtr-types:percentItemType
Balance Type:	na
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- Details

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- Details

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- Details

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- Details

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- Details

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Plan Description (Details) - EBP QACA					12 Months Ended
Plan Description (Details) - EBP QACA	Dec. 31, 2025 USD ($)	Oct. 01, 2025 USD ($)	Jan. 01, 2020	Dec. 31, 2019	Dec. 31, 2025 USD ($) loan year	Dec. 31, 2024 USD ($)
EBP, Description of Plan [Line Items]
Minimum age for participation in plan \| year					18
Automatic enrollment deferral rate					6.00%
Discretionary contribution amount					$ 0	$ 1,693,260
Vesting percentage			100.00%	100.00%	100.00%
Safe harbor vesting period					2 years
Non-safe harbor vesting period					3 years
Maximum borrowing, amount	$ 50,000				$ 50,000
Maximum borrowing, to total account, percentage	50.00%				50.00%
Loan repayment period					5 years
Primary residence, borrowing term	20 years				20 years
Maximum number of notes outstanding \| loan					2
Primary residence, number of notes outstanding \| loan					1
Basis spread on variable rate					1.00%
Participant account balances transferred		$ 63,754,026
Notes receivable account balances transferred		$ 163,921
Transfer of account balances	$ 13,414,738
Transfer of notes receivable from participants	$ 137,081
EBP Employer Contribution Tranche One
EBP, Description of Plan [Line Items]
Employer matching contribution percentage					100.00%
Employer matched contribution percentage					4.00%
EBP Employer Contribution Tranche Two
EBP, Description of Plan [Line Items]
Employer matching contribution percentage					50.00%
Employer matched contribution percentage					2.00%
Minimum
EBP, Description of Plan [Line Items]
Participant contribution, maximum contribution to eligible compensation, percentage					1.00%
Maximum
EBP, Description of Plan [Line Items]
Participant contribution, maximum contribution to eligible compensation, percentage					75.00%