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Contracts with Customers - Narrative (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023	Dec. 31, 2023	Dec. 31, 2022
Schedule Of Contract Assets And Liabilities [Line Items]
Unbilled receivables, net	$ 9,660		$ 9,660		$ 8,317	$ 8,634
Advances and progress billings	58,151		58,151		56,328	53,081
Contract with customer, liability, revenue recognized	$ 3,696	$ 4,004	$ 7,877	$ 7,885	15,298	12,087
Commercial
Schedule Of Contract Assets And Liabilities [Line Items]
Unbilled receivables, expected to be collected after one year					$ 42	$ 117

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Schedule of Contract Assets and Liabilities [Line Items]

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Amount of obligation to transfer good or service to customer for which consideration has been received or is receivable, classified as current.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 606
-SubTopic 10
-Name Accounting Standards Codification
-Section 45
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Amount of revenue recognized that was previously included in balance of obligation to transfer good or service to customer for which consideration from customer has been received or is due.

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Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 606
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Unbilled amounts due for services rendered or to be rendered, actions taken or to be taken, or a promise to refrain from taking certain actions in accordance with the terms of a legally binding agreement between the entity and, at a minimum, one other party. An example would be amounts associated with contracts or programs where the recognized revenue for performance thereunder exceeds the amounts billed under the terms thereof as of the date of the balance sheet.

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Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 912
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Amount of receivables under long-term contracts that have not been billed and were not billable that are expected to be collected after the next fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

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Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 210
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-Name Accounting Standards Codification
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