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Pension Plans - (Tables)
9 Months Ended
Oct. 01, 2022
Retirement Benefits [Abstract]  
Schedule of Net Periodic Pension (Benefit) Cost
Snap-on’s net periodic pension (benefit) cost included the following components: 
Three Months EndedNine Months Ended
(Amounts in millions)October 1, 2022October 2, 2021October 1, 2022October 2, 2021
Service cost$6.7 $7.3 $20.1 $21.7 
Interest cost11.2 10.6 33.5 31.7 
Expected return on plan assets(25.0)(23.6)(74.9)(70.7)
Amortization of unrecognized loss4.6 9.0 13.8 27.2 
Net periodic pension (benefit) cost$(2.5)$3.3 $(7.5)$9.9