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
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-Publisher FASB
-Name Accounting Standards Codification
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Namespace Prefix:	us-gaap_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

Summary of Significant Accounting Policies - Concentration Risk (Details) - segment	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Concentration Risk [Line Items]
Number of reportable segments			3
U.S. Department Of Defense \| Revenue from Contract with Customer Benchmark \| Government Contracts Concentration Risk
Concentration Risk [Line Items]
Concentration risk, percentage	84.00%	83.00%	85.00%	83.00%
International And Commercial Customers \| Revenue from Contract with Customer Benchmark \| Customer Concentration Risk
Concentration Risk [Line Items]
Concentration risk, percentage	16.00%	17.00%	15.00%	17.00%