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Investment in PersolKelly Pte. Ltd. - Narrative (Details)
$ in Millions
3 Months Ended 12 Months Ended
Mar. 01, 2022
USD ($)
Apr. 03, 2022
USD ($)
Dec. 29, 2024
USD ($)
Dec. 31, 2023
USD ($)
Jan. 01, 2023
USD ($)
Feb. 14, 2022
country
Jan. 02, 2022
Schedule of Equity Method Investments [Line Items]              
Proceeds from sale of equity method investment     $ 0.0 $ 0.0 $ 119.5    
Equity in net earnings of affiliate   $ 0.8 0.0 0.0 $ 0.8    
Equity securities, FV-NI and without readily determinable fair value     11.0 7.9      
PersolKelly Pte. Ltd.              
Schedule of Equity Method Investments [Line Items]              
Equity securities, FV-NI and without readily determinable fair value     $ 6.4 $ 6.4      
PersolKelly Pte. Ltd.              
Schedule of Equity Method Investments [Line Items]              
Equity method investment, ownership percentage           49.00% 49.00%
Number of geographies in which entity operates | country           10  
Equity method investment, amount sold, percentage           95.00%  
Proceeds from sale of equity method investment $ 119.5            
Equity method investment, amount sold 117.6            
Amounts reclassified from accumulated other comprehensive income (loss) - liquidation of Japan subsidiary (1.9)            
Gain on disposal $ 1.9            
Equity ownership, excluding consolidated entity and equity method investee, percentage     2.50%        
Equity securities, FV-NI and without readily determinable fair value     $ 6.4