Receivables - Rollforward of Allowances for Doubtful Accounts for Finance and Contract Receivables (Detail) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 28, 2019	Sep. 29, 2018	Sep. 28, 2019	Sep. 29, 2018
Accounts Receivable, Allowance for Credit Loss [Roll Forward]
Finance receivables, allowance for doubtful accounts, beginning of year	$ 60.9	$ 59.0	$ 61.4	$ 56.5
Finance receivables, provision	11.4	12.1	35.8	41.5
Finance receivables, charge-offs	(13.0)	(13.3)	(41.9)	(43.7)
Finance receivables, recoveries	1.9	1.7	5.9	5.3
Finance receivables, currency translation	(0.1)	0.1	(0.1)	0.0
Finance receivables, allowance for doubtful accounts, end of period	61.1	59.6	61.1	59.6
Contract receivables, allowance for doubtful accounts, beginning of year	5.0	4.8	4.3	4.6
Contract receivables, provision	1.9	0.4	4.0	1.5
Contract receivables, charge-offs	(1.0)	(0.7)	(2.7)	(1.8)
Contract receivables, recoveries	0.0	0.1	0.3	0.3
Contract receivables, currency translation	0.1	0.0	0.1	0.0
Contract receivables, allowance for doubtful accounts, end of period	$ 6.0	$ 4.6	$ 6.0	$ 4.6