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Cash and Equivalents (Details) - USD ($) $ in Millions	Jun. 30, 2021	Dec. 31, 2020
Cash and Cash Equivalents [Line Items]
Cash and equivalents	$ 483	$ 436
Operating cash and equivalents
Cash and Cash Equivalents [Line Items]
Cash and equivalents	340	282
Short-term investments
Cash and Cash Equivalents [Line Items]
Cash and equivalents	12	3
Cash and equivalents held in consolidated joint ventures and Aspire Defence subcontracting entities
Cash and Cash Equivalents [Line Items]
Cash and equivalents	131	151
International
Cash and Cash Equivalents [Line Items]
Cash and equivalents	388	382
International | Operating cash and equivalents
Cash and Cash Equivalents [Line Items]
Cash and equivalents	245	228
International | Short-term investments
Cash and Cash Equivalents [Line Items]
Cash and equivalents	12	3
International | Cash and equivalents held in consolidated joint ventures and Aspire Defence subcontracting entities
Cash and Cash Equivalents [Line Items]
Cash and equivalents	131	151
Domestic
Cash and Cash Equivalents [Line Items]
Cash and equivalents	95	54
Domestic | Operating cash and equivalents
Cash and Cash Equivalents [Line Items]
Cash and equivalents	95	54
Domestic | Short-term investments
Cash and Cash Equivalents [Line Items]
Cash and equivalents	0	0
Domestic | Cash and equivalents held in consolidated joint ventures and Aspire Defence subcontracting entities
Cash and Cash Equivalents [Line Items]
Cash and equivalents	$ 0	$ 0

X

- Definition

Amount of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. Excludes cash and cash equivalents within disposal group and discontinued operation.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 4
-URI http://asc.fasb.org/extlink&oid=123570139&loc=d3e3044-108585

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section 45
-Paragraph 1
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=124098289&loc=d3e6676-107765

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.1)
-URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682

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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

No definition available.

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