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Investment in Persol Holdings - Narrative (Details) - USD ($) $ in Millions	12 Months Ended
	Jan. 03, 2021	Dec. 29, 2019	Dec. 30, 2018	Jan. 01, 2018	Dec. 31, 2017
Gain (Loss) on Securities [Line Items]
Stockholders' equity	$ 1,203.0	$ 1,264.5	$ 1,159.5
Gain (loss) on investment in Persol Holdings	(16.6)	35.8	(96.2)
Earnings Invested in the Business
Gain (Loss) on Securities [Line Items]
Stockholders' equity	$ 1,162.9	$ 1,238.6	1,138.1		$ 983.6
Cumulative Effect, Period of Adoption, Adjustment | Accounting Standards Update 2016-01 | Earnings Invested in the Business
Gain (Loss) on Securities [Line Items]
Stockholders' equity			$ 140.0	$ 140.0
OCI & AOCI
Gain (Loss) on Securities [Line Items]
Cumulative effect of new accounting principle in period of adoption, taxes				$ 69.9

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Total of all stockholders' equity (deficit) items, net of receivables from officers, directors, owners, and affiliates of the entity which are attributable to the parent. The amount of the economic entity's stockholders' equity attributable to the parent excludes the amount of stockholders' equity which is allocable to that ownership interest in subsidiary equity which is not attributable to the parent (noncontrolling interest, minority interest). This excludes temporary equity and is sometimes called permanent equity.

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