Subsequent Events	12 Months Ended
Dec. 31, 2020
Subsequent Events [Abstract]
Subsequent Events	Subsequent EventsOn January 31, 2021, PAE Aviation and Technical Services LLC, a Delaware limited liability company (“PAE AvTech”), an indirect wholly owned subsidiary of the Company, acquired the 49% minority interest of Parsons Government Services, Inc. in the DZSP 21 LLC joint venture for a purchase price of $15.8 million, subject to customary purchase price adjustments as set forth in the purchase agreement. Following the completion of this transaction, PAE AvTech owns 100% of DZSP 21 LLC and all the rights, duties and obligations under the DZSP 21 LLC operating agreement and the Guam contracts, all as set forth in the purchase agreement.

The entire disclosure for significant events or transactions that occurred after the balance sheet date through the date the financial statements were issued or the date the financial statements were available to be issued. Examples include: the sale of a capital stock issue, purchase of a business, settlement of litigation, catastrophic loss, significant foreign exchange rate changes, loans to insiders or affiliates, and transactions not in the ordinary course of business.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 855
-URI http://asc.fasb.org/topic&trid=2122774

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 855
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=6842918&loc=SL6314017-165662

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