Receivables - Rollforward of Allowances for Doubtful Accounts for Finance and Contract Receivables (Detail) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2018	Apr. 01, 2017
Allowance for Doubtful Accounts Receivable [Roll Forward]
Finance receivables, allowance for doubtful accounts, beginning of year	$ 56.5	$ 48.6
Finance receivables, provision	15.8	13.0
Finance receivables, charge-offs	(15.8)	(12.9)
Finance receivables, recoveries	1.9	1.7
Finance receivables, currency translation	(0.1)	0.1
Finance receivables, allowance for doubtful accounts, end of period	58.3	50.5
Contract receivables, allowance for doubtful accounts, beginning of year	4.6	3.9
Contract receivables, provision	0.5	1.3
Contract receivables, charge-offs	(0.6)	(0.6)
Contract receivables, recoveries	0.1	0.1
Contract receivables, currency translation	0.0	0.0
Contract receivables, allowance for doubtful accounts, end of period	$ 4.6	$ 4.7