Receivables - Components of Finance and Contract Receivables Beyond One Year (Detail) - USD ($) $ in Millions	Apr. 01, 2017	Dec. 31, 2016
Receivables [Abstract]
Finance receivables, net of unearned finance charges of $13.8 million and $13.0 million, respectively	$ 1,000.8	$ 967.5
Contract receivables, net of unearned finance charges of $21.9 million and $21.5 million, respectively	295.9	289.4
Total	1,296.7	1,256.9
Allowances for doubtful accounts, finance receivables	(34.5)	(33.0)
Allowances for doubtful accounts, contract receivables	(3.3)	(2.7)
Total	(37.8)	(35.7)
Total long-term finance and contract receivables - net	1,258.9	1,221.2
Finance receivables - net	966.3	934.5
Contract receivables - net	292.6	286.7
Total long-term finance and contract receivables - net	$ 1,258.9	$ 1,221.2