0000055135 2025-08-07 2025-08-07 0000055135 us-gaap:CommonClassAMember exch:XNMS 2025-08-07 2025-08-07 0000055135 us-gaap:CommonClassBMember exch:XNMS 2025-08-07 2025-08-07 0000055135 false 8-K 2025-08-07 KELLY SERVICES, INC. DE 0-1088 38-1510762 999 West Big Beaver Road Troy MI 48084 248 362-4444 false false false false Class A Common Stock, $1.00 par value per share KELYA NASDAQ Class B Common Stock, $1.00 par value per share KELYB NASDAQ false