Receivables - Components of Finance and Contract Receivables Beyond One Year (Detail) - USD ($) $ in Millions	Jul. 01, 2017	Dec. 31, 2016
Receivables [Abstract]
Finance receivables, net of unearned finance charges of $15.1 million and $13.0 million, respectively	$ 1,034.6	$ 967.5
Contract receivables, net of unearned finance charges of $23.0 million and $21.5 million, respectively	302.8	289.4
Total	1,337.4	1,256.9
Allowances for doubtful accounts, finance receivables	(36.0)	(33.0)
Allowances for doubtful accounts, contract receivables	(3.4)	(2.7)
Total	(39.4)	(35.7)
Total long-term finance and contract receivables - net	1,298.0	1,221.2
Finance receivables - net	998.6	934.5
Contract receivables - net	299.4	286.7
Total long-term finance and contract receivables - net	$ 1,298.0	$ 1,221.2