Financial Instruments - Fair Values of Financial Instruments Not Approximating Carrying Values in Financial Statements (Detail) - USD ($) $ in Millions	Apr. 01, 2017	Dec. 31, 2016
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term debt, notes payable and current maturities of long-term debt	$ 1,022.6	$ 1,010.2
Carrying Value [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Finance receivables - net	1,451.0	1,407.0
Contract receivables - net	377.1	374.8
Long-term debt, notes payable and current maturities of long-term debt	1,022.6	1,010.2
Fair Value [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Finance receivables - net	1,684.3	1,631.2
Contract receivables - net	414.0	409.7
Long-term debt, notes payable and current maturities of long-term debt	$ 1,035.5	$ 1,076.7