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Earnings Per Share - Net Income Available to Shareholders to Compute Basic and Diluted EPS (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Earnings Per Share [Abstract]
Net income attributable to Parsons Corporation	$ 96,664	$ 64,072	$ 98,541
Convertible senior notes if-converted method interest adjustment	2,176	2,130
Diluted net income attributable to Parsons Corporation	$ 98,840	$ 66,202	$ 98,541

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- Definition

Amount of increase (decrease) to net income used for calculating diluted earnings per share (EPS), resulting from the assumed exercise of dilutive convertible securities excluding adjustments related to ESOP convertible preferred stock, stock options, and restrictive stock units.

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The portion of profit or loss for the period, net of income taxes, which is attributable to the parent.

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