Annual Maturities of Financial Services Borrowings (Detail) - Financial Services $ in Millions	Dec. 31, 2015 USD ($)
Debt Instrument [Line Items]
2016	$ 4,236.6
2017	2,250.2
2018	1,402.7
2019	611.0
2020	92.1
Debt, Long-term and Short-term, Combined Amount, Total	8,592.6
Commercial Papers
Debt Instrument [Line Items]
2016	2,621.2
Debt, Long-term and Short-term, Combined Amount, Total	2,621.2
Notes Payable to Banks
Debt Instrument [Line Items]
2016	39.5
2017	20.3
2018	46.5
2019	32.0
2020	37.8
Debt, Long-term and Short-term, Combined Amount, Total	176.1
Medium-term Notes
Debt Instrument [Line Items]
2016	1,575.9
2017	2,229.9
2018	1,356.2
2019	579.0
2020	54.3
Debt, Long-term and Short-term, Combined Amount, Total	$ 5,795.3