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Postretirement Health Care Plans - (Tables)
6 Months Ended
Jul. 03, 2021
Postemployment Benefits [Abstract]  
Schedule of Net Periodic Postretirement Health Care Cost
Snap-on’s net periodic postretirement health care cost included the following components: 
Three Months EndedSix Months Ended
(Amounts in millions)July 3, 2021June 27, 2020July 3, 2021June 27, 2020
Interest cost$0.3 $0.3 $0.6 $0.7 
Expected return on plan assets(0.2)(0.1)(0.4)(0.3)
Net periodic postretirement health care cost$0.1 $0.2 $0.2 $0.4