Business Acquisition (Details) $ in Millions	12 Months Ended
	Dec. 28, 2019 USD ($)
Business Acquisition [Line Items]
Business Acquisition, Effective Date of Acquisition	Oct. 25, 2019
Business Acquisition, Name of Acquired Entity	AbleVets, LLC
Business Acquisition, Description of Acquired Entity	AbleVets is a health IT engineering and consulting company specializing in cybersecurity, cloud and system development solutions for federal organizations.
Business Combination, Reason for Business Combination	We believe this acquisition enhances our resource capabilities and growth opportunities within our federal business.
Business Combination, Consideration Transferred	$ 75
Business Acquisition, Date of Acquisition Agreement	Oct. 17, 2019
Business Combination, Provisional Information, Initial Accounting Incomplete, Reasons	The allocation of purchase price is subject to changes as working capital and certain other adjustments are agreed upon and finalized, and additional information becomes available; however, we do not expect material changes
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life	8 years