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
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-Name Accounting Standards Codification
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Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

Business Segments and Geographic Information - Customer Concentration Risk (Details) - Customer Concentration Risk - Revenue Benchmark	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Various agencies of the U.S Federal Government
Entity Wide Revenue Major Customer [Line Items]
Percentage of revenue	58.00%	56.00%	53.00%
Minimum
Entity Wide Revenue Major Customer [Line Items]
Percentage of revenue	10.00%