Acquisitions and Disposition - Fair Value of Assets Assumed and Liabilities Acquired (Details) - USD ($) $ in Millions	Apr. 05, 2021	Oct. 03, 2021	Jan. 03, 2021
Business Acquisition [Line Items]
Goodwill		$ 114.8	$ 3.5
Softworld, Inc.
Business Acquisition [Line Items]
Cash	$ 1.4
Trade accounts receivable	21.6
Prepaid expenses and other current assets	3.3
Net property and equipment	1.2
Operating lease right-of-use assets	7.6
Non-current deferred tax	5.9
Goodwill	111.3
Intangibles	79.4
Other assets, noncurrent	1.2
Accounts payable and accrued liabilities, current	(2.5)
Operating lease liabilities, current	(1.3)
Accrued payroll and related taxes, current	(4.6)
Income and other taxes, current	(1.2)
Operating lease liabilities, noncurrent	(6.3)
Total consideration, including working capital adjustments	$ 217.0