For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 42
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Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
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-Name Accounting Standards Codification
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Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 825
-SubTopic 10
-Section 50
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-URI http://asc.fasb.org/extlink&oid=121572278&loc=d3e13531-108611

Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef
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-Topic 825
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Reference 5: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 275
-SubTopic 10
-Section 50
-Paragraph 20
-URI http://asc.fasb.org/extlink&oid=99393423&loc=d3e6404-108592

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Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

Revenue Recognition - Schedule of Percentage of Sales by Contract and Customer (Details) - Sales Revenue, Net	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Customers \| U.S. government
Concentration Risk [Line Items]
Percentage of net sales	96.00%	94.00%	96.00%	94.00%
Customers \| Non U.S. government
Concentration Risk [Line Items]
Percentage of net sales	4.00%	6.00%	4.00%	6.00%
Fixed-price \| Contract
Concentration Risk [Line Items]
Percentage of net sales	61.00%	59.00%	61.00%	61.00%
Cost-reimbursable \| Contract
Concentration Risk [Line Items]
Percentage of net sales	39.00%	41.00%	39.00%	39.00%
Real Estate \| Segment Concentration Risk
Concentration Risk [Line Items]
Percentage of net sales	1.00%	1.00%	1.00%	1.00%