Equipment on Operating Leases - Additional Information (Detail) $ in Millions	Dec. 31, 2019 USD ($)
Property Subject to or Available for Operating Lease [Line Items]
Minimum lease payments receivable for operating leases, in 2020	$ 14.9
Minimum lease payments receivable for operating leases, in 2021	10.3
Minimum lease payments receivable for operating leases, in 2022	7.2
Minimum lease payments receivable for operating leases, in 2023	3.0
Minimum lease payments receivable for operating leases, in 2024	1.1
Minimum lease payments receivable for operating leases, thereafter	2.5
Financial Services
Property Subject to or Available for Operating Lease [Line Items]
Minimum lease payments receivable for operating leases, in 2020	646.8
Minimum lease payments receivable for operating leases, in 2021	472.9
Minimum lease payments receivable for operating leases, in 2022	281.1
Minimum lease payments receivable for operating leases, in 2023	126.5
Minimum lease payments receivable for operating leases, in 2024	40.8
Minimum lease payments receivable for operating leases, thereafter	6.9
Truck, Parts and Other
Property Subject to or Available for Operating Lease [Line Items]
Annual amortization of deferred lease revenues, in 2020	78.6
Annual amortization of deferred lease revenues, in 2021	41.7
Annual amortization of deferred lease revenues, in 2022	17.6
Annual amortization of deferred lease revenues, in 2023	8.9
Annual amortization of deferred lease revenues, in 2024	0.8
Annual amortization of deferred lease revenues, thereafter	0.1
Annual maturities of the residual value guarantees, in 2020	187.3
Annual maturities of the residual value guarantees, in 2021	150.8
Annual maturities of the residual value guarantees, in 2022	55.9
Annual maturities of the residual value guarantees, in 2023	31.2
Annual maturities of the residual value guarantees, in 2024	8.3
Annual maturities of the residual value guarantees, thereafter	$ 6.1