Receivables - Aging of Finance and Contract Receivables (Details) - USD ($) $ in Millions	Sep. 26, 2020	Dec. 28, 2019
Finance Receivables
Financing Receivable, Past Due [Line Items]
Total Past Due	$ 45.8	$ 53.1
Total Not Past Due	1,683.6	1,642.4
Total	1,729.4	1,695.5
Greater Than 90 Days Past Due and Accruing	13.9	17.2
Finance Receivables | 30-59 Days Past Due
Financing Receivable, Past Due [Line Items]
Total Past Due	17.8	19.7
Finance Receivables | 60-90 Days Past Due
Financing Receivable, Past Due [Line Items]
Total Past Due	11.2	12.0
Finance Receivables | Greater Than 90 Days Past Due
Financing Receivable, Past Due [Line Items]
Total Past Due	16.8	21.4
Contract Receivables
Financing Receivable, Past Due [Line Items]
Total Past Due	3.1	3.9
Total Not Past Due	486.4	462.5
Total	489.5	466.4
Greater Than 90 Days Past Due and Accruing	0.3	0.5
Contract Receivables | 30-59 Days Past Due
Financing Receivable, Past Due [Line Items]
Total Past Due	1.3	1.5
Contract Receivables | 60-90 Days Past Due
Financing Receivable, Past Due [Line Items]
Total Past Due	0.5	0.9
Contract Receivables | Greater Than 90 Days Past Due
Financing Receivable, Past Due [Line Items]
Total Past Due	$ 1.3	$ 1.5