Revenue Recognition - Schedule of Percentage of Sales by Contract and Customer (Details) - Sales Revenue, Net	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Contract | Fixed-price
Concentration Risk [Line Items]
Percentage of net sales	56.00%	51.00%
Contract | Cost-reimbursable
Concentration Risk [Line Items]
Percentage of net sales	44.00%	49.00%
Customers | U.S. government
Concentration Risk [Line Items]
Percentage of net sales	95.00%	97.00%
Customers | Non U.S. government
Concentration Risk [Line Items]
Percentage of net sales	5.00%	3.00%
Segment Concentration Risk | Real Estate
Concentration Risk [Line Items]
Percentage of net sales	1.00%	1.00%