v3.25.2
Fair Value Measurements - Narrative (Details)
€ in Millions, $ in Millions
 2 Months Ended 3 Months Ended 6 Months Ended 12 Months Ended
Jul. 17, 2024
USD ($)
derivative
Jan. 05, 2024
USD ($)
Jan. 05, 2024
USD ($)
Jun. 29, 2025
USD ($)
Mar. 30, 2025
USD ($)
Dec. 29, 2024
USD ($)
Jun. 30, 2024
USD ($)
Mar. 31, 2024
USD ($)
Jun. 29, 2025
USD ($)
Jun. 30, 2024
USD ($)
Dec. 31, 2023
USD ($)
May 31, 2024
USD ($)
Feb. 08, 2024
EUR (€)
Nov. 02, 2023
EUR (€)
Jan. 01, 2023
USD ($)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]                              
Gain on forward contract             $ 0.0     $ 1.2          
Unrealized gain (loss) on derivatives                     $ (3.6)        
Payments for derivative instrument, investing activities                 $ 0.0 2.4          
Gain on forward contract       $ 0.0     0.0   0.0 1.2          
Equity Securities                              
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]                              
Equity securities without readily determinable fair value, with changes in fair value in net income       3.5   $ 3.5     3.5           $ 0.4
Foreign Exchange Forward                              
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]                              
Derivative, notional amount | €                         € 17.0 € 90.0  
Payments for derivative instrument, financing activities           0.4                  
Gain on forward contract           (0.4)                  
Foreign currency forward contract, liability, net           0.0                  
Foreign currency forward contract, net           0.0                  
Unrealized gain (loss) on derivatives                     $ (3.6)        
Payments for derivative instrument, investing activities   $ 2.4                          
Gain on forward contract               $ 1.2              
Derivative instruments not designated as hedging instruments, loss     $ 2.4                        
Interest Rate Swap                              
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]                              
Derivative, notional amount $ 50.0                            
Number of interest rate swaps | derivative 2                            
Interest Rate Swap | Securitization Facility                              
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]                              
Foreign currency forward contract, liability, net       0.1   0.4     0.1            
Interest Rate Swap | Measured on Recurring Basis                              
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]                              
Foreign currency forward contract, liability, net       0.1   0.4     0.1            
Interest Rate Swap, Contract One | Securitization Facility                              
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]                              
Derivative, notional amount $ 50.0                            
Derivative, term of contract 12 months                            
EMEA | Measured on Recurring Basis                              
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]                              
Indemnification       2.2   2.0     2.2            
Brazil | Measured on Recurring Basis                              
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]                              
Indemnification       0.9   1.7     0.9            
Brazil | Maximum                              
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]                              
Indemnification liability       8.8         8.8            
Motion Recruitment Partners, LLC                              
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]                              
Business combination, contingent consideration, liability           0.0                  
Contingent consideration, maximum                       $ 60.0      
PersolKelly Pte. Ltd.                              
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]                              
Equity securities without readily determinable fair value, with changes in fair value in net income           6.4                  
Equity ownership, excluding consolidated entity and equity method investee, percentage         2.50%                    
Proceeds from derivative instrument, financing activities         $ 6.4                    
Level 3 | Interest Rate Swap | Measured on Recurring Basis                              
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]                              
Foreign currency forward contract, liability, net       0.0   0.0     0.0            
Level 3 | EMEA | Measured on Recurring Basis                              
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]                              
Indemnification       2.2   2.0     2.2            
Level 3 | Brazil | Measured on Recurring Basis                              
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]                              
Indemnification       0.9   1.7     0.9            
Level 3 | Motion Recruitment Partners, LLC                              
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]                              
Business combination, contingent consideration, liability           0.0 $ 3.4     $ 3.4          
Contingent consideration, maximum       $ 60.0         $ 60.0            
Level 3 | Accounts Payable and Accrued Liabilities | Brazil                              
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]                              
Indemnification liability           0.9                  
Level 3 | Other Long Term Liabilities | Brazil                              
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]                              
Indemnification liability           $ 0.8