XML 58 R42.htm IDEA: XBRL DOCUMENT
v3.7.0.1

Revenue - Remaining Performance Obligations to be Recognized as Revenue (Details) $ in Billions | Apr. 02, 2017 USD ($)
--- | ---
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items] |
Amount of remaining performance obligations to be recognized as revenue by period | $ 60.4
2017 |
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items] |
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period | 1 year
Revenue, Remaining Performance Obligation, Percentage Recognized | 30.00%
2018-2019 |
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items] |
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period | 2 years
Revenue, Remaining Performance Obligation, Percentage Recognized | 45.00%

X
- Definition Revenue, Remaining Performance Obligation + References No definition available. + Details
Name: | gd_RevenueRemainingPerformanceObligation
Namespace Prefix: | gd_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition [Line Items] for Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Table] + References No definition available. + Details
Name: | gd_RevenueRemainingPerformanceObligationExpectedTimingofSatisfactionLineItems
Namespace Prefix: | gd_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period + References No definition available. + Details
Name: | gd_RevenueRemainingPerformanceObligationExpectedTimingofSatisfactionPeriod
Namespace Prefix: | gd_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Revenue, Remaining Performance Obligation, Percentage Recognized + References No definition available. + Details
Name: | gd_RevenueRemainingPerformanceObligationPercentageRecognized
Namespace Prefix: | gd_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Details
Name: | gd_RevenueRemainingPerformanceObligationExpectedTimingofSatisfactionStartDateAxis=gd_A20170101Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | gd_RevenueRemainingPerformanceObligationExpectedTimingofSatisfactionStartDateAxis=gd_A20180101Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |