0000055135 2022-08-11 2022-08-11 0000055135 us-gaap:CommonClassAMember exch:XNMS 2022-08-11 2022-08-11 0000055135 us-gaap:CommonClassBMember exch:XNMS 2022-08-11 2022-08-11 0000055135 false 8-K 2022-08-11 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 KELYA NASDAQ Class B Common KELYB NASDAQ false