XML 63 R50.htm IDEA: XBRL DOCUMENT
v3.19.2

Revenue - Revenue by Contract Type (Details) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2019 | Jul. 01, 2018 | Jun. 30, 2019 | Jul. 01, 2018
Revenue [Line Items] |  |  |  |
Revenue | $ 9,555 | $ 9,186 | $ 18,816 | $ 16,721
Aerospace |  |  |  |
Revenue [Line Items] |  |  |  |
Revenue | 2,136 | 1,895 | 4,376 | 3,720
Combat Systems |  |  |  |
Revenue [Line Items] |  |  |  |
Revenue | 1,659 | 1,534 | 3,295 | 2,974
Information Technology |  |  |  |
Revenue [Line Items] |  |  |  |
Revenue | 2,158 | 2,442 | 4,327 | 3,580
Mission Systems |  |  |  |
Revenue [Line Items] |  |  |  |
Revenue | 1,277 | 1,147 | 2,435 | 2,245
Marine Systems |  |  |  |
Revenue [Line Items] |  |  |  |
Revenue | 2,325 | 2,168 | 4,383 | 4,202
Fixed-price |  |  |  |
Revenue [Line Items] |  |  |  |
Revenue | 6,554 | 6,115 | 12,998 | 11,348
Fixed-price | Aerospace |  |  |  |
Revenue [Line Items] |  |  |  |
Revenue | 1,925 | 1,696 | 3,965 | 3,364
Fixed-price | Combat Systems |  |  |  |
Revenue [Line Items] |  |  |  |
Revenue | 1,427 | 1,330 | 2,843 | 2,583
Fixed-price | Information Technology |  |  |  |
Revenue [Line Items] |  |  |  |
Revenue | 875 | 1,059 | 1,796 | 1,446
Fixed-price | Mission Systems |  |  |  |
Revenue [Line Items] |  |  |  |
Revenue | 752 | 658 | 1,403 | 1,278
Fixed-price | Marine Systems |  |  |  |
Revenue [Line Items] |  |  |  |
Revenue | 1,575 | 1,372 | 2,991 | 2,677
Cost-reimbursement |  |  |  |
Revenue [Line Items] |  |  |  |
Revenue | 2,308 | 2,373 | 4,463 | 4,297
Cost-reimbursement | Aerospace |  |  |  |
Revenue [Line Items] |  |  |  |
Revenue | 0 | 0 | 0 | 0
Cost-reimbursement | Combat Systems |  |  |  |
Revenue [Line Items] |  |  |  |
Revenue | 221 | 197 | 432 | 376
Cost-reimbursement | Information Technology |  |  |  |
Revenue [Line Items] |  |  |  |
Revenue | 858 | 930 | 1,699 | 1,507
Cost-reimbursement | Mission Systems |  |  |  |
Revenue [Line Items] |  |  |  |
Revenue | 484 | 451 | 947 | 891
Cost-reimbursement | Marine Systems |  |  |  |
Revenue [Line Items] |  |  |  |
Revenue | 745 | 795 | 1,385 | 1,523
Time-and-materials |  |  |  |
Revenue [Line Items] |  |  |  |
Revenue | 693 | 698 | 1,355 | 1,076
Time-and-materials | Aerospace |  |  |  |
Revenue [Line Items] |  |  |  |
Revenue | 211 | 199 | 411 | 356
Time-and-materials | Combat Systems |  |  |  |
Revenue [Line Items] |  |  |  |
Revenue | 11 | 7 | 20 | 15
Time-and-materials | Information Technology |  |  |  |
Revenue [Line Items] |  |  |  |
Revenue | 425 | 453 | 832 | 627
Time-and-materials | Mission Systems |  |  |  |
Revenue [Line Items] |  |  |  |
Revenue | 41 | 38 | 85 | 76
Time-and-materials | Marine Systems |  |  |  |
Revenue [Line Items] |  |  |  |
Revenue | $ 5 | $ 1 | $ 7 | $ 2

X
- 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 No definition available. + Details
Name: | us-gaap_EntityWideRevenueMajorCustomerLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount, excluding tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value added and excise. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 4 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=118956577&loc=SL49130543-203045 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=118956577&loc=SL49130545-203045 + Details
Name: | us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Details
Name: | us-gaap_StatementBusinessSegmentsAxis=gd_AerospaceMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementBusinessSegmentsAxis=gd_CombatSystemsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementBusinessSegmentsAxis=gd_InformationTechnologyMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementBusinessSegmentsAxis=gd_MissionSystemsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementBusinessSegmentsAxis=gd_MarineSystemsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_ContractWithCustomerBasisOfPricingAxis=us-gaap_FixedPriceContractMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_ContractWithCustomerBasisOfPricingAxis=gd_CostReimbursementMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_ContractWithCustomerBasisOfPricingAxis=us-gaap_TimeAndMaterialsContractMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |